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Song J, Huang F, Ma K, Ding R, Tan K, Lv D, Soyano K, Zhao K. Bifenthrin induces changes in clinical poisoning symptoms, oxidative stress, DNA damage, histological characteristics, and transcriptome in Chinese giant salamander (Andrias davidianus) larvae. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 927:172041. [PMID: 38554955 DOI: 10.1016/j.scitotenv.2024.172041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Revised: 03/26/2024] [Accepted: 03/26/2024] [Indexed: 04/02/2024]
Abstract
Bifenthrin (BF) is a broad-spectrum insecticide that has gained widespread use due to its high effectiveness. However, there is limited research on the potential toxic effects of bifenthrin pollution on amphibians. This study aimed to investigate the 50 % lethal concentration (LC50) and safety concentration of Chinese giant salamanders (CGS) exposed to BF (at 0, 6.25,12.5,25 and 50 μg/L BF) for 96 h. Subsequently, CGS were exposed to BF (at 0, 0.04, and 4 μg/L BF) for one week to investigate its toxic effects. Clinical poisoning symptoms, liver pathology, oxidative stress factors, DNA damage, and transcriptome differences were observed and analyzed. The results indicate that exposure to BF at 4 μg/L significantly decreased the adenosine-triphosphate (ATP), superoxide dismutase (SOD), glutathione (GSH), and catalase (CAT) contents in the brain, liver, and kidney of CGS. Additionally, the study found that the malondialdehyde (MDA), reactive oxygen species (ROS), and 8-hydroxydeoxyguanosine (8-OHdG) contents were increased. The liver tissue exhibited significant inflammatory reactions and structural malformations. RNA-seq analysis of the liver showed that BF caused abnormal antioxidant indices of CGS. This affected molecular function genes such as catalytic activity, ATP-dependent activity, metabolic processes, signaling and immune system processes, behavior, and detoxification, which were significantly upregulated, resulting in the differential genes significantly enriched in the calcium signaling pathway, PPARα signaling pathway and NF-kB signaling pathway. The results suggest that BF induces the abnormal production of free radicals, which overwhelms the body's self-defense system, leading to varying degrees of oxidative stress. This can result in oxidative damage, DNA damage, abnormal lipid metabolism, autoimmune diseases, clinical poisoning symptoms, and tissue inflammation. This work provides a theoretical basis for the rational application of bifenthrin and environmental risk assessment, as well as scientific guidance for the conservation of amphibian populations.
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Affiliation(s)
- Jing Song
- College of Life Science, Anqing Normal University, Anqing 246133, Anhui, China; The Belt and Road Model International Science and Technology Cooperation Base for Biodiversity Conservation and Utilization in Basins of Anhui Province, Anqing Normal University, Anqing 246133, Anhui, China; Institute for East China Sea Research, Organization for Marine Science and Technology, Nagasaki University, Nagasaki 851-2213, Japan
| | - Fengyun Huang
- College of Life Science, Anqing Normal University, Anqing 246133, Anhui, China; The Belt and Road Model International Science and Technology Cooperation Base for Biodiversity Conservation and Utilization in Basins of Anhui Province, Anqing Normal University, Anqing 246133, Anhui, China
| | - Kun Ma
- College of Life Science, Anqing Normal University, Anqing 246133, Anhui, China; The Belt and Road Model International Science and Technology Cooperation Base for Biodiversity Conservation and Utilization in Basins of Anhui Province, Anqing Normal University, Anqing 246133, Anhui, China
| | - Rui Ding
- College of Life Science, Anqing Normal University, Anqing 246133, Anhui, China; The Belt and Road Model International Science and Technology Cooperation Base for Biodiversity Conservation and Utilization in Basins of Anhui Province, Anqing Normal University, Anqing 246133, Anhui, China
| | - Kai Tan
- College of Life Science, Anqing Normal University, Anqing 246133, Anhui, China; The Belt and Road Model International Science and Technology Cooperation Base for Biodiversity Conservation and Utilization in Basins of Anhui Province, Anqing Normal University, Anqing 246133, Anhui, China
| | - Dan Lv
- College of Life Science, Anqing Normal University, Anqing 246133, Anhui, China
| | - Kiyoshi Soyano
- Graduate School of Fisheries and Environmental Sciences, Nagasaki University, Nagasaki 852-8521, Japan; Institute for East China Sea Research, Organization for Marine Science and Technology, Nagasaki University, Nagasaki 851-2213, Japan
| | - Kai Zhao
- College of Life Science, Anqing Normal University, Anqing 246133, Anhui, China; The Belt and Road Model International Science and Technology Cooperation Base for Biodiversity Conservation and Utilization in Basins of Anhui Province, Anqing Normal University, Anqing 246133, Anhui, China
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Rutkoski CF, Grott SC, Israel NG, Guerreiro FDC, Carneiro FE, Bitschinski D, Warsneski A, Horn PA, Lima D, Bastolla CLV, Mattos JJ, Bainy ACD, da Silva EB, de Albuquerque CAC, Alves TC, de Almeida EA. Prednisone and prednisolone effects on development, blood, biochemical and histopathological markers of Aquarana catesbeianus tadpoles. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2024; 268:106869. [PMID: 38387247 DOI: 10.1016/j.aquatox.2024.106869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Revised: 01/31/2024] [Accepted: 02/17/2024] [Indexed: 02/24/2024]
Abstract
Synthetic glucocorticoids are often found in surface waters and can cause harmful effects to aquatic organisms such as amphibians. In this work we evaluated the effects of the drugs prednisone (PD) and prednisolone (PL) on developmental, molecular, blood, biochemical and histological markers. Aquarana catesbeianus tadpoles were exposed for 16 days to environmentally relevant concentrations of 0, 0.1, 1 and 10 µg/L of both drugs. PD increased the transcript levels of the enzyme deiodinase III (Dio3), the hormones cortisol and T4 and delayed development. Changes in the thyroid gland occurred after tadpoles were exposed to both drugs, with a reduction in the diameter and number of follicles and an increase/or decrease in area. Also, both drugs caused a decrease in lymphocytes (L) and an increase in neutrophils (N), thrombocytes, the N:L ratio and lobed and notched erythrocytes. Increased activity of the enzymes superoxide dismutase, glutathione S-transferase and glucose 6-phosphate dehydrogenase was observed after exposure to PD. Furthermore, both drugs caused an increase in the activity of the enzymes catalase and glutathione peroxidase. However, only PD caused oxidative stress in exposed tadpoles, evidenced by increased levels of malondialdehyde and carbonyl proteins. Both drugs caused an increase in inflammatory infiltrates, blood cells and melanomacrophages in the liver. Our results indicate that PD was more toxic than PL, affecting development and causing oxidative stress.
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Affiliation(s)
- Camila Fatima Rutkoski
- Environmental Engineering Post-Graduation Program, University of Blumenau, Blumenau, SC, Brazil
| | - Suelen Cristina Grott
- Environmental Engineering Post-Graduation Program, University of Blumenau, Blumenau, SC, Brazil
| | - Nicole Grasmuk Israel
- Environmental Engineering Post-Graduation Program, University of Blumenau, Blumenau, SC, Brazil
| | | | | | - Daiane Bitschinski
- Biodiversity Post-Graduation Program, University of Blumenau, Blumenau, SC, Brazil
| | - Aline Warsneski
- Environmental Engineering Post-Graduation Program, University of Blumenau, Blumenau, SC, Brazil
| | - Priscila Aparecida Horn
- Environmental Engineering Post-Graduation Program, University of Blumenau, Blumenau, SC, Brazil
| | - Daína Lima
- Laboratory of Biomarkers of Aquatic Contamination and Immunochemistry, Department of Biochemistry, Federal University of Santa Catarina, UFSC, Florianópolis, SC, Brazil
| | - Camila Lisarb Velasquez Bastolla
- Laboratory of Biomarkers of Aquatic Contamination and Immunochemistry, Department of Biochemistry, Federal University of Santa Catarina, UFSC, Florianópolis, SC, Brazil
| | - Jacó Joaquim Mattos
- Laboratory of Biomarkers of Aquatic Contamination and Immunochemistry, Department of Biochemistry, Federal University of Santa Catarina, UFSC, Florianópolis, SC, Brazil
| | - Afonso Celso Dias Bainy
- Laboratory of Biomarkers of Aquatic Contamination and Immunochemistry, Department of Biochemistry, Federal University of Santa Catarina, UFSC, Florianópolis, SC, Brazil
| | | | | | - Thiago Caique Alves
- Environmental Engineering Post-Graduation Program, University of Blumenau, Blumenau, SC, Brazil
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Macagnan N, Rutkoski CF, Folador A, Skovronski VJ, Müller C, Hartmann PA, Hartmann M. Mortality and toxicity of a commercial formulation of cypermethrin in Physalaemus gracilis tadpoles. Sci Rep 2023; 13:17826. [PMID: 37857789 PMCID: PMC10587170 DOI: 10.1038/s41598-023-45090-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Accepted: 10/16/2023] [Indexed: 10/21/2023] Open
Abstract
This study evaluated the lethal, sublethal, and toxic of a commercial formulation of cypermethrin in the anuran species Physalaemus gracilis. In the acute test, concentrations of 100-800 μg L-1 were tested over 96 h. In the chronic test, cypermethrin concentrations recorded in nature (1, 3, 6, and 20 μg L-1) were tested for mortality and then used for the micronucleus test and erythrocyte nuclear abnormalities over a 7-days period. The LC50 determined for P. gracilis for the commercial cypermethrin formulation was 273.41 μg L-1. In the chronic test, a mortality of more than 50% was observed at the highest concentration (20 μg L-1), as it caused half of the tadpoles studied to die. The micronucleus test showed significant results at concentrations of 6 and 20 μg L-1 and recorded the presence of several nuclear abnormalities, indicating the genotoxic potential of the commercial cypermethrin formulation for P. gracilis. Cypermethrin presented a high risk to the species, indicating that it has the potential to cause several problems in the short and long term and to affect the dynamics of this ecosystem. Therefore, it can be concluded that the commercial formulation of cypermethrin had toxicological effects on P. gracilis.
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Affiliation(s)
- Natani Macagnan
- Ecology and Conservation Laboratory, Federal University of Fronteira Sul, Erechim, RS, 99.700-000, Brazil
| | - Camila Fatima Rutkoski
- Ecology and Conservation Laboratory, Federal University of Fronteira Sul, Erechim, RS, 99.700-000, Brazil
| | - Alexandre Folador
- Ecology and Conservation Laboratory, Federal University of Fronteira Sul, Erechim, RS, 99.700-000, Brazil
| | | | - Caroline Müller
- Ecology and Conservation Laboratory, Federal University of Fronteira Sul, Erechim, RS, 99.700-000, Brazil
| | - Paulo Afonso Hartmann
- Ecology and Conservation Laboratory, Federal University of Fronteira Sul, Erechim, RS, 99.700-000, Brazil
| | - Marilia Hartmann
- Ecology and Conservation Laboratory, Federal University of Fronteira Sul, Erechim, RS, 99.700-000, Brazil.
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Rimoldi F, Salgado Costa C, Pantucci Saralegui MJ, Bahl MF, Natale GS. Recovery of Ceratophrys ornata tadpoles exposed to environmental concentrations of chlorpyrifos: evaluation of biomarkers of exposure. ECOTOXICOLOGY (LONDON, ENGLAND) 2023:10.1007/s10646-023-02670-7. [PMID: 37277545 DOI: 10.1007/s10646-023-02670-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 05/24/2023] [Indexed: 06/07/2023]
Abstract
Chlorpyrifos (CPF) is one of the most widely used insecticides worldwide despite the fact that many authors have warned about its effects in non-target biota. The effects of CPF on anurans are well known, but the process of recovery from these effects after exposure is less explored. The aim of this study was to evaluate the duration of sublethal effects induced by environmental concentrations of CPF on Ceratophrys ornata tadpoles after exposure. The experimental design consisted of an exposure phase (96 h) in which tadpoles were individually exposed to three concentrations of CPF (0, 0.01 and 0.02 mg CPF/L) and a post-exposure phase (72 h) in which exposed tadpoles were transferred to CPF-free media. Individuals that survived the exposure phase to CPF showed neither long-term lethal effects nor long-term swimming alterations and altered prey consumption after being transferred to CPF-free media. No morphological abnormalities were observed either. However, at the end of both phases, tadpoles emitted shorter sounds with a higher dominant frequency than the tadpoles in the control group, i.e., the tadpoles did not recover their normal sounds. Thus, for the first time in this species, we have shown that effects on sounds should be prioritized as biomarkers of exposure, as they not only provide longer detection times after cessation of exposure, but also involve non-destructive methods. The following order of priority could be established for the selection of biomarkers that diagnose the health status of individuals and precede irreversible responses such as mortality: alterations in sounds > swimming alterations > prey consumption.
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Affiliation(s)
- Federico Rimoldi
- Centro de Investigaciones del Medio Ambiente (CIM), Universidad Nacional de La Plata (UNLP)-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Bv. 120 n° 1489 (1900), La Plata, Buenos Aires, Argentina
| | - Carolina Salgado Costa
- Centro de Investigaciones del Medio Ambiente (CIM), Universidad Nacional de La Plata (UNLP)-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Bv. 120 n° 1489 (1900), La Plata, Buenos Aires, Argentina
| | - Morena Johana Pantucci Saralegui
- Instituto de Limnología Dr. Raúl A. Ringuelet (ILPLA), CONICET- UNLP, Boulevard 120 y 62 (1900), La Plata, Buenos Aires, Argentina
| | - María Florencia Bahl
- Centro de Investigaciones del Medio Ambiente (CIM), Universidad Nacional de La Plata (UNLP)-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Bv. 120 n° 1489 (1900), La Plata, Buenos Aires, Argentina
| | - Guillermo Sebastián Natale
- Centro de Investigaciones del Medio Ambiente (CIM), Universidad Nacional de La Plata (UNLP)-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Bv. 120 n° 1489 (1900), La Plata, Buenos Aires, Argentina.
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5
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Qin S, Xia T, Li G, Gu L, Sun Y, Yang Z. Impact of atrazine on the dynamic response of Daphnia pulex populations to fish predation risk. Front Ecol Evol 2023. [DOI: 10.3389/fevo.2022.1068077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Herbicide pollution is persistent, which not only has a negative impact on individual organisms, but also may alter population dynamics and stability of interspecific relationships. Cladocerans, an important part of zooplankton, are often simultaneously exposed to environmental pollutants and predation risk in the aquatic environment. To evaluate the combined effects of atrazine and fish predation risk on the population traits of cladocerans, we exposed Daphnia pulex to different concentrations of atrazine (0, 0.05, 0.10, and 1.0 mg L−1) with or without fish (Rhodeus ocellatus) kairomone, recorded the key population traits, and fitted Gaussian model to population dynamics. Results showed that fish kairomone increased the population density at the end of the experiment and resting eggs production, and tended to decrease the total biomass and the average dry weight per individual of D. pulex. Atrazine reduced the total biomass, the average dry weight per individual, and resting eggs production of D. pulex populations. Atrazine also decreased the population density at the end of the experiment of D. pulex in fish kairomone treatment, and attenuated the promoting effect of fish kairomone on resting eggs production and the reduction of the total biomass. The findings highlighted the importance of considering the combined impact of environmental pollutants and predation risks on zooplankton populations.
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Cheron M, Kato A, Ropert-Coudert Y, Meyer X, MacIntosh AJJ, Raoelison L, Brischoux F. Exposure, but not timing of exposure, to a sulfonylurea herbicide alters larval development and behaviour in an amphibian species. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2023; 254:106355. [PMID: 36446167 DOI: 10.1016/j.aquatox.2022.106355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Revised: 11/10/2022] [Accepted: 11/13/2022] [Indexed: 06/16/2023]
Abstract
Environmental contamination is one of the major causes of biodiversity loss. Wetlands are particularly susceptible to contamination and species inhabiting these habitats are subjected to pollutants during sensitive phases of their development. In this study, tadpoles of a widespread amphibian, the spined toad (Bufo spinosus), were exposed to environmental concentrations of nicosulfuron (0 μg/L; 0.15 ± 0.05 μg/L and 0.83 ± 0.04 μg/L), a sulfonylurea herbicide, during different phases of development. Tadpoles were exposed during embryonic (12.98 ± 0.90 days) or larval development (93.74± 0.85 days), or throughout both phases, and we quantified development duration, morphological traits and behavioural features as responses to exposure. Developing tadpoles exposed to nicosulfuron were larger, but with smaller body, and had shorter but wider tail muscles. They were also more active and swam faster than control tadpoles and showed diverging patterns of behavioural complexity. We showed that higher concentrations had greater effects on individuals than lower concentrations, but the timing of nicosulfuron exposure did not influence the metrics studied: Exposure to nicosulfuron triggered similar effects irrespective of the developmental stages at which exposure occurred. These results further indicate that transient exposure (e.g., during embryonic development) can induce long-lasting effects throughout larval development to metamorphosis. Our study confirms that contaminants at environmental concentrations can have strong consequences on non-target organisms. Our results emphasize the need for regulation agencies and policy makers to consider sublethal concentrations of sulfonulyrea herbicides, such as nicosulfuron, as a minimum threshold in their recommendations.
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Affiliation(s)
- Marion Cheron
- Centre d'Études Biologiques de Chizé, CEBC UMR 7372, CNRS-La Rochelle Université, Villiers-en-Bois 79360, France.
| | - Akiko Kato
- Centre d'Études Biologiques de Chizé, CEBC UMR 7372, CNRS-La Rochelle Université, Villiers-en-Bois 79360, France
| | - Yan Ropert-Coudert
- Centre d'Études Biologiques de Chizé, CEBC UMR 7372, CNRS-La Rochelle Université, Villiers-en-Bois 79360, France
| | - Xavier Meyer
- European Science Foundation, 1 quai Lezay-Marnesia, Strasbourg 67080, France
| | - Andrew J J MacIntosh
- Kyoto University Primate Research Institute, 41-2 Kanrin, Inuyama 484-8506, Japan
| | - Léa Raoelison
- Centre d'Études Biologiques de Chizé, CEBC UMR 7372, CNRS-La Rochelle Université, Villiers-en-Bois 79360, France
| | - François Brischoux
- Centre d'Études Biologiques de Chizé, CEBC UMR 7372, CNRS-La Rochelle Université, Villiers-en-Bois 79360, France
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Qin S, Yang T, Yu B, Zhang L, Gu L, Sun Y, Yang Z. The stress effect of atrazine on the inducible defense traits of Daphnia pulex in response to fish predation risk: Evidences from morphology, life history traits, and expression of the defense-related genes. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 311:119965. [PMID: 35998771 DOI: 10.1016/j.envpol.2022.119965] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 08/08/2022] [Accepted: 08/09/2022] [Indexed: 06/15/2023]
Abstract
Herbicide pollution is persistent, which not only has a negative impact on individual organisms, but also may endanger the interspecific relationship between predators and prey. Cladocerans, i.e. zooplankton that plays an important role in the energy flow and material circulation in freshwater ecosystem, usually develop induced defense in response to predation risk. We used atrazine, one of the most used herbicides in the world, and Daphnia pulex, a representative cladocerans, to test the possible interference effect of herbicides on the induced defensive traits of cladocerans in response to predator fish (Rhodeus ocellatus) kairomone, including morphological defense, life history strategies, and the expression of defense-related genes. Atrazine reduced the body size, spine size, growth rate, total offspring, and the relative reproductive output of D. pulex, which further affected the response strength of the morphological and life history defenses, i.e., atrazine significantly reduced the spine size, relative spine size, and fecundity of D. pulex in response to R. ocellatus kairomone. Exposure to atrazine affected the expression of defense-related genes, and we speculated that atrazine affected the signaling process in the induced anti-predation defense of cladocerans. Specially, fish kairomone attenuated the negative effects of high concentrations of atrazine on the life history traits of D. pulex. Our results will help to accurately assess the potential risk of artificial compounds in freshwater ecosystems from the perspective of interspecific relationships, and help to understand the impact of environmental changes on the inducible anti-predator defense of prey in aquatic ecosystems.
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Affiliation(s)
- Shanshan Qin
- Jiangsu Key Laboratory for Biodiversity and Biotechnology, School of Biological Sciences, Nanjing Normal University, 1 Wenyuan Road, Nanjing, 210023, China
| | - Tingting Yang
- Jiangsu Key Laboratory for Biodiversity and Biotechnology, School of Biological Sciences, Nanjing Normal University, 1 Wenyuan Road, Nanjing, 210023, China
| | - Bo Yu
- Jiangsu Key Laboratory for Biodiversity and Biotechnology, School of Biological Sciences, Nanjing Normal University, 1 Wenyuan Road, Nanjing, 210023, China
| | - Lu Zhang
- Jiangsu Key Laboratory for Biodiversity and Biotechnology, School of Biological Sciences, Nanjing Normal University, 1 Wenyuan Road, Nanjing, 210023, China
| | - Lei Gu
- Jiangsu Key Laboratory for Biodiversity and Biotechnology, School of Biological Sciences, Nanjing Normal University, 1 Wenyuan Road, Nanjing, 210023, China
| | - Yunfei Sun
- Jiangsu Key Laboratory for Biodiversity and Biotechnology, School of Biological Sciences, Nanjing Normal University, 1 Wenyuan Road, Nanjing, 210023, China
| | - Zhou Yang
- Jiangsu Key Laboratory for Biodiversity and Biotechnology, School of Biological Sciences, Nanjing Normal University, 1 Wenyuan Road, Nanjing, 210023, China.
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Bassó A, Devin S, Peltzer PM, Attademo AM, Lajmanovich RC. The integrated biomarker response in three anuran species larvae at sublethal concentrations of cypermethrin, chlorpyrifos, glyphosate, and glufosinate-ammonium. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART. B, PESTICIDES, FOOD CONTAMINANTS, AND AGRICULTURAL WASTES 2022; 57:687-696. [PMID: 35852372 DOI: 10.1080/03601234.2022.2099197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The aim of the present study was to evaluate the response in larvae of the anuran species Rhinella arenarum, Rhinella dorbignyi and Odontophrynus americanus exposed to glyphosate (GLY, 2.5 mg L-1), cypermethrin (CYP, 0.013 mg L-1), chlorpyrifos (CP, 0.1 mg L-1) and glufosinate-ammonium (GLU, 15 mg L-1) using two behavioral endpoints: mean speed (MS) and total distance moved (TD); and two enzymatic biomarkers: acetylcholinesterase (AChE) and butyrylcholinesterase (BChE). In order to assess a global response and to determine the most sensitive species, an integrated biomarker response (IBR) index was calculated. Behavioral biomarkers were tested at 1 and 60 min, and the enzymes at 60 min after exposure. The results showed that: (1) there were statistical differences between species in a series of responses in swimming behavior, and cholinesterase activities within the first-hour of exposure to CYP, GLY, and CP at environmentally relevant concentrations (ERC); (2) IBR determined that Rhinella species were the most sensitive of the species tested and (3) IBR provided a comprehensive assessment of the health status of species exposed to ERC of a wide variety of agrochemicals globally and frequently used.
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Affiliation(s)
- Agustín Bassó
- School of Biochemistry and Biological Sciences, National University of Littoral (FBCB UNL), Santa Fe, Argentina
| | - Simon Devin
- CNRS, LIEC, Université de Lorraine, Metz, France
| | - Paola M Peltzer
- School of Biochemistry and Biological Sciences, National University of Littoral (FBCB UNL), Santa Fe, Argentina
- National Council for Scientific and Technical Research (CONICET), Buenos Aires, Argentina
| | - Andrés M Attademo
- School of Biochemistry and Biological Sciences, National University of Littoral (FBCB UNL), Santa Fe, Argentina
- National Council for Scientific and Technical Research (CONICET), Buenos Aires, Argentina
| | - Rafael C Lajmanovich
- School of Biochemistry and Biological Sciences, National University of Littoral (FBCB UNL), Santa Fe, Argentina
- National Council for Scientific and Technical Research (CONICET), Buenos Aires, Argentina
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9
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Silberschmidt Freitas J, da Silva Pinto TJ, Cardoso Yoshii MP, Conceição Menezes da Silva L, de Palma Lopes LF, Pretti Ogura A, Girotto L, Montagner CC, de Oliveira Gonçalves Alho L, Castelhano Gebara R, Schiesari L, Gaeta Espíndola EL. Realistic exposure to fipronil, 2,4-D, vinasse and their mixtures impair larval amphibian physiology. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 299:118894. [PMID: 35085654 DOI: 10.1016/j.envpol.2022.118894] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2021] [Revised: 12/31/2021] [Accepted: 01/21/2022] [Indexed: 06/14/2023]
Abstract
Expansion of sugarcane crops may have contributed to the increased contamination of native habitats in Brazil. Several species of amphibians inhabit ponds formed in flooded farmlands, where pesticide concentrations are usually high. This study evaluated the ecotoxicological effects of the sugarcane pesticides fipronil and 2,4-D, as well as the fertilizer vinasse (isolated and mixed), on physiological responses of Leptodactylus fuscus and Lithobates catesbeianus tadpoles. In situ assays were conducted in mesocosms with concentrations based on the doses recommended by the manufacturer. Vinasse (1.3% dilution) caused 100% tadpoles' mortality immediately after its application. Fipronil and/or 2,4-D altered antioxidant and biotransformation responses, induced neurotoxicity and changed lipid contents in tadpoles. A multivariate approach indicated that the mixture of pesticides induced most of the sublethal effects in both tadpole species, in addition to the isolated fipronil in L. fuscus. Fipronil alone increased glucose-6-phosphate dehydrogenase (G6PDH) activity, decreased acetylcholinesterase (AChE) and total lipid contents, and altered some individual lipid classes (e.g., free fatty acids and acetone-mobile polar lipids) in L. fuscus. The interaction between fipronil and 2,4-D in this species were more evident for lipid contents, although enzymatic alterations in G6PDH, AChE and glutathione-S-transferase (GST) were also observed. In L. catesbeianus, the mixture of pesticides reduced triglycerides and total lipids, as well as increased GST and decreased AChE activities. The detoxifying enzyme carboxylesterase was reduced by 2,4-D (alone or in mixture) in both species. Isolated pesticides also modulated specific lipid classes, suggesting their disruptive action on energy metabolism of tadpoles. Our study showed that fipronil, 2,4-D, and vinasse, individually or mixed, can be harmful to amphibians during their larval phase, causing mortality or impairing their functional responses.
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Affiliation(s)
- Juliane Silberschmidt Freitas
- NEEA/UEMG, Department of Agrarian and Natural Sciences, Minas Gerais State University (UEMG), R. Ver. Geraldo Moisés da Silva, s/n - Universitário, 38302-192, Ituiutaba, MG, Brazil.
| | - Thandy Junio da Silva Pinto
- NEEA/CRHEA/SHS, São Carlos Engineering School, University of São Paulo, Av. Trabalhador São Carlense, 400, 13.560-970, São Carlos, Brazil
| | - Maria Paula Cardoso Yoshii
- NEEA/CRHEA/SHS, São Carlos Engineering School, University of São Paulo, Av. Trabalhador São Carlense, 400, 13.560-970, São Carlos, Brazil
| | - Laís Conceição Menezes da Silva
- NEEA/CRHEA/SHS, São Carlos Engineering School, University of São Paulo, Av. Trabalhador São Carlense, 400, 13.560-970, São Carlos, Brazil
| | - Laís Fernanda de Palma Lopes
- NEEA/CRHEA/SHS, São Carlos Engineering School, University of São Paulo, Av. Trabalhador São Carlense, 400, 13.560-970, São Carlos, Brazil
| | - Allan Pretti Ogura
- NEEA/CRHEA/SHS, São Carlos Engineering School, University of São Paulo, Av. Trabalhador São Carlense, 400, 13.560-970, São Carlos, Brazil
| | - Laís Girotto
- NEEA/CRHEA/SHS, São Carlos Engineering School, University of São Paulo, Av. Trabalhador São Carlense, 400, 13.560-970, São Carlos, Brazil
| | - Cassiana Carolina Montagner
- Analytical Chemistry Department, Institute of Chemistry, University of Campinas, Campinas, São Paulo, Brazil
| | | | | | - Luís Schiesari
- EACH, USP - School of Arts, Sciences and Humanities, University of São Paulo, Av. Arlindo Bétio 1000, São Paulo, SP, 03828-000, Brazil
| | - Evaldo Luiz Gaeta Espíndola
- NEEA/CRHEA/SHS, São Carlos Engineering School, University of São Paulo, Av. Trabalhador São Carlense, 400, 13.560-970, São Carlos, Brazil
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10
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Zambrano-Fernández S, Zamora-Camacho FJ, Aragón P. Direct and indirect effects of chronic exposure to ammonium on anuran larvae survivorship, morphology, and swimming speed. CHEMOSPHERE 2022; 287:132349. [PMID: 34826957 DOI: 10.1016/j.chemosphere.2021.132349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2021] [Revised: 09/06/2021] [Accepted: 09/22/2021] [Indexed: 06/13/2023]
Abstract
Several constituents of the current global change are usually deemed accountable for the worldwide declines of amphibian populations. Among these, water contamination poses a major threat, especially to larval stages, which are unable to escape a polluted water body. This problem is remarkable in agrosystems, one of the main sources of water pollution and whose area is forecasted to increase in the forthcoming decades. However, pollutants represent a selective pressure that may result in tolerance in affected areas. In this work, we tested whether chronic exposure to a sublethal concentration of ammonium (10 mg/L), one of the most frequent agrochemicals, affects differently hatching success, survivorship, morphology and swimming performance of Pelophylax perezi tadpoles from agrosystem and pine grove habitats. Ammonium diminished survivorship at the earliest stages after hatching. Thus, lower density was a by-product of exposure to ammonium. Higher density slowed down development, reduced snout-vent length, and had a sharper negative effect on body mass and tail length and depth of ammonium treated individuals with respect to the control. In turn, ammonium accelerated development and increased body mass, SVL, and tail length and depth. These effects did not depend on provenance habitat. However, only pine grove tadpoles' swimming speed was negatively affected by ammonium, which supports the hypothesis that agrosystem tadpoles are more tolerant to ammonium. Finally, corroborating previous findings, tadpoles with larger bodies and tails were faster swimmers, whereas proportionally more massive individuals were slower, and tail depth was unrelated to swimming speed.
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Affiliation(s)
| | - Francisco Javier Zamora-Camacho
- Museo Nacional de Ciencias Naturales, (MNCN-CSIC), C/ José Gutiérrez Abascal 2, 28006, Madrid, Spain; Universidad Complutense de Madrid, C/José Antonio Novais 2, 2804, Madrid, Spain.
| | - Pedro Aragón
- Museo Nacional de Ciencias Naturales, (MNCN-CSIC), C/ José Gutiérrez Abascal 2, 28006, Madrid, Spain; Universidad Complutense de Madrid, C/José Antonio Novais 2, 2804, Madrid, Spain
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11
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Laino A, Romero S, Cunningham M, Molina G, Gabellone C, Trabalon M, Garcia CF. Can Wolf Spider Mothers Detect Insecticides in the Environment? Does the Silk of the Egg-Sac Protect Juveniles from Insecticides? ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2021; 40:2861-2873. [PMID: 34314524 DOI: 10.1002/etc.5157] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 04/19/2021] [Accepted: 07/08/2021] [Indexed: 06/13/2023]
Abstract
The use of pesticides for plague control in agroecosystems generates a threat to wildlife and a major problem for human health. Pesticide compounds are also an important source of water and atmosphere contamination. Although insecticides are effective on their target organisms, they often affect organisms that are not their target. The aim of the present study was to research the effects of 3 types of neurotoxic insecticides-a pyrethroid (cypermethrin), a neonicotinoid (imidacloprid), and an organophosphate (chlorpyrifos)-on behavioral and physiological parameters of Pardosa saltans spider (Lycosidae). Our study analyzed for the first time the exploratory behavior of the spider mothers in the presence of these 3 insecticides on their egg-sacs and also on the ground. We also evaluated the oxidative stress effects on the juveniles hatched in the egg-sac protected by silk in relation to variations in detoxification enzymes (catalase, glutathione reductase, superoxide dismutase, glutathione-S-transferase, and glutathione peroxidase) and lipid peroxidation (reactive oxygen species [ROS]). The results show that these insecticides are repellents for mothers (cypermethrin is the most repellent), and maternal behavior is modified after detection of an insecticide on their egg-sac but mothers do not abandon their egg-sacs. These neurotoxic insecticides affect the juveniles inside their egg-sac. Cypermethrin and chlorpyrifos caused more oxidative stress in juveniles than did imidacloprid. The ROS generated by these insecticides seemed to be adequately eliminated by the juveniles' antioxidant systems. Environ Toxicol Chem 2021;40:2861-2873. © 2021 SETAC.
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Affiliation(s)
- A Laino
- Instituto de Investigaciones Bioquímicas de La Plata "Prof. Dr. Rodolfo R. Brenner,", La Plata, Argentina
| | - S Romero
- Instituto de Investigaciones Bioquímicas de La Plata "Prof. Dr. Rodolfo R. Brenner,", La Plata, Argentina
| | - M Cunningham
- Instituto de Investigaciones Bioquímicas de La Plata "Prof. Dr. Rodolfo R. Brenner,", La Plata, Argentina
| | - G Molina
- Instituto de Investigaciones Bioquímicas de La Plata "Prof. Dr. Rodolfo R. Brenner,", La Plata, Argentina
| | - C Gabellone
- Centro de Estudios Parasitológicos y Vectores, La Plata, Argentina
| | - M Trabalon
- Université de Rennes 1, CNRS, EthoS-UMR 6552, Rennes, France
| | - C F Garcia
- Instituto de Investigaciones Bioquímicas de La Plata "Prof. Dr. Rodolfo R. Brenner,", La Plata, Argentina
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12
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Shojaei N, Naderi S, Yasari E, Moradi N. Exposure to common pesticides utilized in northern rice fields of Iran affects survival of non-target species, Pelophylax ridibundus (Amphibia: Ranidae). ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:10.1007/s11356-021-13168-2. [PMID: 33641106 DOI: 10.1007/s11356-021-13168-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Accepted: 02/22/2021] [Indexed: 06/12/2023]
Abstract
Amphibians are the most important vulnerable non-target vertebrate group that are affected by pesticides. Most previous studies have confirmed the destructive effects of pesticides. But, so far, no comprehensive studies have been carried out in Iran. Therefore, to estimate the mortality rate of frogs during the growing season in different cultivating systems, we examined the presence of pesticides in water and substrate as indicators of habitat quality and in the liver tissue of Marsh frog Pelophylax ridibundus (Pallas, 1771), enclosed in the prepared cages at five rice paddy fields in Mazandaran province, Iran. The measurement of pollution was done using mass gas chromatography method and statistical analyses by Minitab software. Furthermore, the probable movement pattern of free frogs was analyzed using capture-mark-recapture method. Thirteen pesticides were detected both in the habitat and in frogs' liver tissue. Among them ß-Mevinphos, Fenitrothion, Bromofos, and Trifluralin had the most frequent occurrence in liver tissue, and Diazinon with concentrations up to 517.8 μg/Kg had the highest concentration. Furthermore, there is a significant correlation (R2 > 0.96) between water quality and frogs' contamination, whereas, no correlation was observed between substrate pollution and frogs' contamination. Pesticide concentrations were higher in two stations but lower than lethal doses to frogs, so that no mortality was observed at any of the stations. However, some specimens had a considerable muscle atrophy. Despite no significant movement pattern was detected, we can expect that if this trend continues, in a long term, they will face a reduction in the survival rate.
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Affiliation(s)
- Nadimeh Shojaei
- Department of Environmental Sciences, Faculty of Natural Resources, University of Guilan, Rasht, Iran
| | - Saeid Naderi
- Department of Environmental Sciences, Faculty of Natural Resources, University of Guilan, Rasht, Iran.
| | - Esmaeil Yasari
- Department of Agricultural Science, Payame Noor University, Tehran, Iran
- Agricultural Agri-Food Canada, Summerland Research and Development, Summerland, BC, Canada
| | - Naeim Moradi
- Iranian Plateau Herpetology Research Group (IPHRG), Faculty of Sciences, Razi University, Kermanshah, Iran
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13
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Torquetti CG, Guimarães ATB, Soto-Blanco B. Exposure to pesticides in bats. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 755:142509. [PMID: 33032135 DOI: 10.1016/j.scitotenv.2020.142509] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 09/15/2020] [Accepted: 09/16/2020] [Indexed: 06/11/2023]
Abstract
Bats provide a variety of ecological services that are essential to the integrity of ecosystems. Indiscriminate use of pesticides has been a threat to biodiversity, and the exposure of bats to these xenobiotics is a threat to their populations. This study presents a review of articles regarding the exposure of bats to pesticides published in the period from January 1951 to July 2020, addressing the temporal and geographical distribution of research, the studied species, and the most studied classes of pesticides. The research was concentrated in the 1970s and 1980s, mostly in the Northern Hemisphere, mainly in the USA. Of the total species in the world, only 5% of them have been studied, evaluating predominantly insectivorous species of the Family Vespertilionidae. Insecticides, mainly organochlorines, were the most studied pesticides. Most research was observational, with little information available on the effects of pesticides on natural bat populations. Despite the advances in analytical techniques for detecting contaminants, the number of studies is still insufficient compared to the number of active ingredients used. The effects of pesticides on other guilds and tropical species remain poorly studied. Future research should investigate the effects of pesticides, especially in sublethal doses causing chronic exposure. It is crucial to assess the impact of these substances on other food guilds and investigate how natural populations respond to the exposure to mixtures of pesticides found in the environment.
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Affiliation(s)
- Camila Guimarães Torquetti
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais (UFMG), Avenida Antônio Carlos 6627, Belo Horizonte, MG 30123-970, Brazil
| | - Ana Tereza Bittencourt Guimarães
- Laboratório de Investigações Biológicas, Centro de Ciências Biológicas e da Saúde, Universidade Estadual do Oeste do Paraná, Rua Universitária 2069, Cascavel, PR 85819-110, Brazil
| | - Benito Soto-Blanco
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais (UFMG), Avenida Antônio Carlos 6627, Belo Horizonte, MG 30123-970, Brazil.
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14
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Smalling KL, Rowe JC, Pearl CA, Iwanowicz LR, Givens CE, Anderson CW, McCreary B, Adams MJ. Monitoring wetland water quality related to livestock grazing in amphibian habitats. ENVIRONMENTAL MONITORING AND ASSESSMENT 2021; 193:58. [PMID: 33439357 PMCID: PMC7806560 DOI: 10.1007/s10661-020-08838-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Accepted: 12/29/2020] [Indexed: 06/12/2023]
Abstract
Land use alteration such as livestock grazing can affect water quality in habitats of at-risk wildlife species. Data from managed wetlands are needed to understand levels of exposure for aquatic life stages and monitor grazing-related changes afield. We quantified spatial and temporal variation in water quality in wetlands occupied by threatened Oregon spotted frog (Rana pretiosa) at Klamath Marsh National Wildlife Refuge in Oregon, United States (US). We used analyses for censored data to evaluate the importance of habitat type and grazing history in predicting concentrations of nutrients, turbidity, fecal indicator bacteria (FIB; total coliforms, Escherichia coli (E. coli), and enterococci), and estrogenicity, an indicator of estrogenic activity. Nutrients (orthophosphate and ammonia) and enterococci varied over time and space, while E. coli, total coliforms, turbidity, and estrogenicity were more strongly associated with local livestock grazing metrics. Turbidity was correlated with several grazing-related constituents and may be particularly useful for monitoring water quality in landscapes with livestock use. Concentrations of orthophosphate and estrogenicity were elevated at several sites relative to published health benchmarks, and their potential effects on Rana pretiosa warrant further investigation. Our data provided an initial assessment of potential exposure of amphibians to grazing-related constituents in western US wetlands. Increased monitoring of surface water quality and amphibian population status in combination with controlled laboratory toxicity studies could help inform future research and targeted management strategies for wetlands with both grazing and amphibians of conservation concern.
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Affiliation(s)
- Kelly L Smalling
- U.S. Geological Survey, New Jersey Water Science Center, Lawrenceville, NJ, 08648, USA.
| | - Jennifer C Rowe
- U.S. Geological Survey, Forest and Rangeland Ecosystem Science Center, Corvallis, OR, 97331, USA
| | - Christopher A Pearl
- U.S. Geological Survey, Forest and Rangeland Ecosystem Science Center, Corvallis, OR, 97331, USA
| | - Luke R Iwanowicz
- U.S. Geological Survey, Leetown Science Center, Kearneysville, WV, 25430, USA
| | - Carrie E Givens
- U.S. Geological Survey, Upper Midwest Water Science Center, Lansing, MI, 48911, USA
| | - Chauncey W Anderson
- U.S. Geological Survey, Oregon Water Science Center, Portland, OR, 97201, USA
| | - Brome McCreary
- U.S. Geological Survey, Forest and Rangeland Ecosystem Science Center, Corvallis, OR, 97331, USA
| | - Michael J Adams
- U.S. Geological Survey, Forest and Rangeland Ecosystem Science Center, Corvallis, OR, 97331, USA
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15
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Rutkoski CF, Macagnan N, Folador A, Skovronski VJ, do Amaral AMB, Leitemperger JW, Costa MD, Hartmann PA, Müller C, Loro VL, Hartmann MT. Cypermethrin- and fipronil-based insecticides cause biochemical changes in Physalaemus gracilis tadpoles. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:4377-4387. [PMID: 32940837 DOI: 10.1007/s11356-020-10798-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Accepted: 09/09/2020] [Indexed: 06/11/2023]
Abstract
Insecticides used for agricultural pest control, as cypermethrin-based insecticide (CBI) and fipronil-based insecticide (FBI), are constant threats to non-target aquatic organisms. This study aimed to investigate the effect of different concentrations of cypermethrin and fipronil on neurotoxicity and oxidative stress in Physalaemus gracilis. Physalaemus gracilis tadpoles were exposed to five insecticide concentrations and a control treatment, with six replicates. During the experimental period, the tadpole mortality rate was evaluated and after 168 h, the neurotoxic enzyme activity and metabolite quantification related to the antioxidant system were measured. Tadpoles reduced acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) activities when exposed to 20 μg L-1 CBI and at all FBI concentrations, respectively. Glutathione S-transferase (GST) and superoxide dismutase (SOD) activities showed an increase from concentrations of 6 μg L-1 and 20 μg L-1 of CBI, respectively. After exposure of P. gracilis tadpoles to FBI, inhibitions of AChE and BChE were observed at the highest concentrations evaluated (500 and 1500 μg L-1). SOD activity decreased from 50 μg L-1 of FBI; however, catalase (CAT) and GST activities and carbonyl protein levels increased, regardless of the evaluated dose. We observed that both insecticides promoted oxidative stress and neurotoxic effects in P. gracilis tadpoles. These results suggest that biochemical biomarkers can be used for monitoring toxicity insecticides for the purpose of preservation of P. gracilis.
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Affiliation(s)
- Camila F Rutkoski
- Ecology and Conservation Laboratory, Federal University of Fronteira Sul, Erechim Campus, RS 135 - Km 72, no 200, Erechim, RS, 99.700-000, Brazil.
| | - Natani Macagnan
- Ecology and Conservation Laboratory, Federal University of Fronteira Sul, Erechim Campus, RS 135 - Km 72, no 200, Erechim, RS, 99.700-000, Brazil
| | - Alexandre Folador
- Ecology and Conservation Laboratory, Federal University of Fronteira Sul, Erechim Campus, RS 135 - Km 72, no 200, Erechim, RS, 99.700-000, Brazil
| | - Vrandrieli J Skovronski
- Ecology and Conservation Laboratory, Federal University of Fronteira Sul, Erechim Campus, RS 135 - Km 72, no 200, Erechim, RS, 99.700-000, Brazil
| | - Aline M B do Amaral
- Biochemistry and Molecular Biology Department, Federal University of Santa Maria, Camobi Campus, Av Roraima, no 1423, Camobi, RS, 97.105-340, Brazil
| | - Jossiele Wesz Leitemperger
- Biochemistry and Molecular Biology Department, Federal University of Santa Maria, Camobi Campus, Av Roraima, no 1423, Camobi, RS, 97.105-340, Brazil
| | - Maiara Dorneles Costa
- Biochemistry and Molecular Biology Department, Federal University of Santa Maria, Camobi Campus, Av Roraima, no 1423, Camobi, RS, 97.105-340, Brazil
| | - Paulo A Hartmann
- Ecology and Conservation Laboratory, Federal University of Fronteira Sul, Erechim Campus, RS 135 - Km 72, no 200, Erechim, RS, 99.700-000, Brazil
| | - Caroline Müller
- Ecology and Conservation Laboratory, Federal University of Fronteira Sul, Erechim Campus, RS 135 - Km 72, no 200, Erechim, RS, 99.700-000, Brazil
| | - Vania L Loro
- Biochemistry and Molecular Biology Department, Federal University of Santa Maria, Camobi Campus, Av Roraima, no 1423, Camobi, RS, 97.105-340, Brazil
| | - Marilia T Hartmann
- Ecology and Conservation Laboratory, Federal University of Fronteira Sul, Erechim Campus, RS 135 - Km 72, no 200, Erechim, RS, 99.700-000, Brazil
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16
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Stark JD, McIntyre JK, Banks JE. Population viability in a host-parasitoid system is mediated by interactions between population stage structure and life stage differential susceptibility to toxicants. Sci Rep 2020; 10:20746. [PMID: 33247223 PMCID: PMC7699617 DOI: 10.1038/s41598-020-77496-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Accepted: 11/06/2020] [Indexed: 11/24/2022] Open
Abstract
The effects of toxicants, such as pesticides, may be more severe for some life stages of an organism than others. However, in most toxicity studies, data is developed for only one life stage, which may lead to misleading interpretations. Furthermore, population stage-structure may interact with differential susceptibility, especially when populations consist of higher proportions of individuals in more susceptible stages at the time of toxicant exposure. We explore the interaction of differential stage susceptibility and stage distribution using a stage-structured Lefkovitch matrix model. We incorporate lab-derived toxicity data for a common parasitoid, the braconid Diaeretiella rapae (M’Intosh), a common natural enemy of the cabbage aphid (Brevicoryne brassicae L.), exposed to the pesticide imidacloprid. We compare population outcomes of simulations in which we vary both the population stage structure along with the susceptibility of each stage to toxicants. Our results illustrate an interaction between differential susceptibility and initial stage distribution, highlighting the fact that both of these demographic features should be considered in interpreting toxicity data and the development of ecological risk assessments.
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Affiliation(s)
- John D Stark
- Ecotoxicology Program, Department of Entomology, Research and Extension Center, Washington State University, Puyallup, WA, 98371, USA.
| | - Jenifer K McIntyre
- Research and Extension Center, School of the Environment, Washington State University, Puyallup, WA, 98371, USA
| | - John E Banks
- Undergraduate Research Opportunities Center, California State University, 100 Campus Center Seaside, Monterey Bay, CA, 93955, USA
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17
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Fungicide Exposure Induces Sensitivity Differences in Aquatic Life Stages of European Common Frogs (Rana temporaria). J HERPETOL 2020. [DOI: 10.1670/19-004] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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18
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Ruiz de Arcaute C, Brodeur JC, Soloneski S, Larramendy ML. Toxicity to Rhinella arenarum tadpoles (Anura, Bufonidae) of herbicide mixtures commonly used to treat fallow containing resistant weeds: glyphosate-dicamba and glyphosate-flurochloridone. CHEMOSPHERE 2020; 245:125623. [PMID: 31855759 DOI: 10.1016/j.chemosphere.2019.125623] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Revised: 12/06/2019] [Accepted: 12/09/2019] [Indexed: 06/10/2023]
Abstract
Glyphosate (GLY)-dicamba (DIC) and GLY-flurochloridone (FLC) are herbicide mixtures which are widely used for treating fallow containing glyphosate resistant weeds. The aim of this study was to evaluate the acute toxic effects and the prevailing interactions on stage 36 tadpoles of the anuran species Rhinella arenarum when exposed to equitoxic and non-equitoxic combinations of these herbicide combinations. Experiments were realized using the following combinations of commercial formulations: 48% GLY-based Credit® + 57.71% DIC-based Banvel® and 48% GLY-based Credit® + 25% FLC-based Twin Pack Gold®. GLY-DIC and GLY-FLC equitoxic mixtures were assayed mixing each constituent with an equivalent individual toxicity able to induce the same lethality effect. After 96 h of exposure, GLY-DIC and GLY-FLC equitoxic mixtures presented toxic unit 50 values (TU50 96h) of 1.74 (confidence interval: 1.58-1.92) and 1.54 (confidence interval: 1.46-1.62) respectively, indicating the presence of a weak antagonistic interaction as TU values were greater than 1. For their part, most non-equitoxic combinations of GLY-DIC and GLY-FLC tested did not significantly differ from additivity, the only exception being when DIC and FLC were fixed at 0.33 TUs, where a weak antagonism was observed. Overall, results indicate that the toxicity of both GLY-DIC and GLY-FLC mixtures to R. arenarum tadpoles vary from additive to slightly antagonistic, depending on the proportion of constituting herbicide formulations present in the mixture.
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Affiliation(s)
- Celeste Ruiz de Arcaute
- Cátedra de Citología, Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata, Calle 64 Nº 3, B1904AMA, La Plata, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Julie C Brodeur
- Instituto de Recursos Biológicos, Centro de Investigaciones de Recursos Naturales (CIRN), Instituto Nacional de Tecnología Agropecuaria (INTA), Hurlingham, Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Sonia Soloneski
- Cátedra de Citología, Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata, Calle 64 Nº 3, B1904AMA, La Plata, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Marcelo L Larramendy
- Cátedra de Citología, Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata, Calle 64 Nº 3, B1904AMA, La Plata, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina.
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19
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Pedersen KE, Pedersen NN, Meyling NV, Fredensborg BL, Cedergreen N. Differences in life stage sensitivity of the beetle Tenebrio molitor towards a pyrethroid insecticide explained by stage-specific variations in uptake, elimination and activity of detoxifying enzymes. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2020; 162:113-121. [PMID: 31836046 DOI: 10.1016/j.pestbp.2019.09.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Revised: 08/28/2019] [Accepted: 09/25/2019] [Indexed: 06/10/2023]
Abstract
It is widely accepted that sensitivity towards pesticides varies significantly between species. Much less is known about the potential differences in pesticide sensitivity and its biological mechanism throughout the lifecycle of a single species. In the present study we used three life-stages (larvae, pupae and adult) of the holometabolous insect Tenebrio molitor to investigate: i) Life-stage specific differences in sensitivity towards the pyrethroid insecticide α-cypermethrin after topical exposure, and ii) whether these differences can be explained by the degree of uptake and/or excretion. Finally, we investigated if an efficient excretion coincided with higher activities of the detoxifying enzymes cytochrome P450 (P450), esterases (EST) and glutathione-S-transferease (GST). We found that mobility of adults of T. molitor was more affected by α-cypermethrin treatment than larvae and pupae. Mortality was relatively low for all life stages and did not vary significantly with dose within the duration of the experiment, which indicated that death was (at least partly) due to starvation (indirect effect of paralysis) rather that direct effects of the insecticide. Insecticide treatment during the pupal stage further impaired normal development from pupa to adult. Toxicokinetic measurements showed that cuticle penetration of α-cypermethrin differed significantly between life-stages. Approximately 50% of the applied insecticide had penetrated the adult cuticle after 1 h, whereas a maximum of 30% and 16% had penetrated the waxier cuticle of larvae and pupae. Further, the pupal stage lacked the ability to excrete compounds, and hence internal insecticide concentrations in pupae increased or stagnated until emergence of the adult. Finally, quantification of detoxification enzymes showed a markedly higher activity of P450 in adults and larvae compared to pupae. These findings suggest that assessing toxicity and/or risk of pesticides collectively for a species may not be adequate without taking into account the potential sensitivity differences between life stages.
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Affiliation(s)
- Kathrine Eggers Pedersen
- Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, 1871 Frederiksberg, Denmark.
| | - Nanna Natacha Pedersen
- Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, 1871 Frederiksberg, Denmark
| | - Nicolai Vitt Meyling
- Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, 1871 Frederiksberg, Denmark
| | - Brian Lund Fredensborg
- Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, 1871 Frederiksberg, Denmark
| | - Nina Cedergreen
- Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, 1871 Frederiksberg, Denmark
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20
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Vanzetto GV, Slaviero JG, Sturza PF, Rutkoski CF, Macagnan N, Kolcenti C, Hartmann PA, Ferreira CM, Hartmann MT. Toxic effects of pyrethroids in tadpoles of Physalaemus gracilis (Anura: Leptodactylidae). ECOTOXICOLOGY (LONDON, ENGLAND) 2019; 28:1105-1114. [PMID: 31587130 DOI: 10.1007/s10646-019-02115-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 09/20/2019] [Indexed: 06/10/2023]
Abstract
Pyrethroid insecticides are one of the most commonly used pesticide groups, but these compounds have brought risks to non-target species, such as amphibians. This study evaluated the toxicological effects (mortality, swimming activity and oral morphology) caused to a South American species of anuran amphibian, Physalaemus gracilis, exposed to the pyrethroids cypermethrin and deltamethrin. Total spawnings of this anuran were collected in the natural environment and transported to the laboratory where they were kept under controlled conditions. Chronic assays were defined between 0.1 and 0.01 mg L-1 of cypermethrin, and 0.009 and 0.001 mg L-1 of deltamethrin. For cypermethrin, a further chronic toxicity test was performed at 0.05 and 2.0 mg L-1, with hatchlings at stages S.20-S.25. Cypermethrin and deltamethrin were lethal enough to kill over 70% of exposed tadpoles in 1 week at concentrations that can be found in nature (0.01-0.1 mg L-1). The exposure effects also influenced swimming activity and caused changes in oral morphology, which would make it difficult for the animals to survive in their natural habitat. Both pyrethroids presented a risk for P. gracilis, so they should be re-evaluated for non-target wild species.
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Affiliation(s)
- Guilherme V Vanzetto
- Laboratory of Ecology and Conservation, Federal University of Fronteira Sul, Erechim Campus, Brazil
| | - Jéssica G Slaviero
- Laboratory of Ecology and Conservation, Federal University of Fronteira Sul, Erechim Campus, Brazil
| | - Paola F Sturza
- Laboratory of Ecology and Conservation, Federal University of Fronteira Sul, Erechim Campus, Brazil
| | - Camila F Rutkoski
- Laboratory of Ecology and Conservation, Federal University of Fronteira Sul, Erechim Campus, Brazil
| | - Natani Macagnan
- Laboratory of Ecology and Conservation, Federal University of Fronteira Sul, Erechim Campus, Brazil
| | - Cassiane Kolcenti
- Laboratory of Ecology and Conservation, Federal University of Fronteira Sul, Erechim Campus, Brazil
| | - Paulo A Hartmann
- Laboratory of Ecology and Conservation, Federal University of Fronteira Sul, Erechim Campus, Brazil
| | | | - Marilia T Hartmann
- Laboratory of Ecology and Conservation, Federal University of Fronteira Sul, Erechim Campus, Brazil.
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Freitas JS, Girotto L, Goulart BV, Alho LDOG, Gebara RC, Montagner CC, Schiesari L, Espíndola ELG. Effects of 2,4-D-based herbicide (DMA ® 806) on sensitivity, respiration rates, energy reserves and behavior of tadpoles. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 182:109446. [PMID: 31323523 DOI: 10.1016/j.ecoenv.2019.109446] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Revised: 06/22/2019] [Accepted: 07/11/2019] [Indexed: 06/10/2023]
Abstract
Increased use of sugarcane pesticides and their destination to non-target environments in Brazil has generated concerns related to the conservation of more vulnerable groups, such as amphibians. Besides the high skin permeability, tadpoles are constantly restricted to small and ephemeral ponds, where exposure to high concentrations of pesticides in agricultural areas is inevitable. This study evaluated chronic effects caused by sub-lethal concentrations of 2,4-dichlorophenoxyacetic acid herbicide on energy storage, development, respiration rates, swimming performance and avoidance behavior of bullfrog tadpoles (Lithobates catesbeianus). Firstly, we conducted acute toxicity test (96 h) to estipulate sub-lethal concentrations of 2,4-D and evaluate the sensitivity of three tadpoles' species to this herbicide. Results showed that Leptodactylus fuscus presented the lowest LC50 96 h, 28.81 mg/L, followed by Physalaemus nattereri (143.08 mg/L) and L. catesbeianus (574.52 mg/L). Chronic exposure to 2,4-D (125, 250 and 500 μg/L) delayed metamorphosis and inhibited the growth of tadpoles at concentrations of 125 μg/L. Effects on biochemical reserves showed that 2,4-D increased total hepatic lipids in tadpoles, although some individual lipid classes (e.g. free fatty acids and triglycerides) were reduced. Protein and carbohydrates contents were also impaired by 2,4-D, suggesting a disruption on energy metabolism of amphibians by the herbicide. In addition to biochemical changes, respiration rates and swimming speed were also decreased after chronic exposure to 2,4-D, and these responses appeared to be correlated with the changes detected in the basic energy content. Avoidance test indicated that tadpoles of L. catesbeinus avoided the presence of 2,4-D, however they were unable to detect increasing gradients of the contaminant. Our data showed that chronic exposure to 2,4-D impaired biochemical, physiological and behavioral aspects of tadpoles, which may compromise their health and make them more vulnerable to environmental stressors in natural systems.
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Affiliation(s)
| | - Laís Girotto
- NEEA/CRHEA/SHS, São Carlos Engineering School, University of São Paulo, São Carlos, SP, Brazil
| | - Bianca Veloso Goulart
- Analytical Chemistry Department, Institute of Chemistry, University of Campinas, Campinas, SP, Brazil
| | | | | | | | - Luis Schiesari
- EACH, USP - School of Arts, Sciences and Humanities, São Paulo, SP, Brazil
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Good Governance: A Framework for Implementing Sustainable Land Management, Applied to an Agricultural Case in Northeast-Brazil. SUSTAINABILITY 2019. [DOI: 10.3390/su11164303] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Land management needs to cope with persistent environmental and societal changes. This requires functional governance systems. The purpose of this research is to develop a good governance framework for the implementation of sustainable land management. Good governance theory is extensive, although its operationalization remains difficult. We derived a set of good governance attributes from the literature: (i) the functionality of the regulatory framework, (ii) the legitimacy and accountability of the actors, (iii) the fairness and transparency of the decision-making processes, and (iv) quality control and adaptiveness. These constitute a framework which, supported by guiding questions, facilitates the evaluation of governance attributes to assess sustainable land management practices. We applied the scheme to a case study in Northeast Brazil regarding sustainable land management where biological pest control is considered to be a biodiversity-related ecosystem service. Since its adoption often falls short of expectations, we scrutinized its governance system. First, experts answered our guiding questions, and second, we involved local stakeholders in the discussion of good governance attributes through the participatory approach of constellation analysis. Trust in agricultural consultants and issues of the practical application of pest control turned out to be crucial. The workshop participants requested a model farm to build more trust and experience. There was considerable demand for policy at the national planning level to formulate and monitor the content of the agricultural advisory program. Our conceptualized framework of good governance questions provides systematization for planning and steering the implementation of sustainable land management practices.
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McCann S, Crossland M, Greenlees M, Shine R. Invader control: factors influencing the attraction of cane toad (Rhinella marina) larvae to adult parotoid exudate. Biol Invasions 2019. [DOI: 10.1007/s10530-019-01969-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Seleem AA. Teratogenicity and neurotoxicity effects induced by methomyl insecticide on the developmental stages of Bufo arabicus. Neurotoxicol Teratol 2019; 72:1-9. [DOI: 10.1016/j.ntt.2018.12.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2018] [Revised: 12/22/2018] [Accepted: 12/30/2018] [Indexed: 01/01/2023]
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Quiroga LB, Sanabria EA, Fornés MW, Bustos DA, Tejedo M. Sublethal concentrations of chlorpyrifos induce changes in the thermal sensitivity and tolerance of anuran tadpoles in the toad Rhinella arenarum? CHEMOSPHERE 2019; 219:671-677. [PMID: 30557723 DOI: 10.1016/j.chemosphere.2018.12.059] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Revised: 12/06/2018] [Accepted: 12/07/2018] [Indexed: 06/09/2023]
Abstract
Amphibians are considered one of the groups most susceptible to chemical contamination, therefore are good bio-indicators of aquatic pollution. Synergistic effects of temperature and pesticides have been found in amphibians determining amplified toxicity effect on survival and malformations with increasing temperatures. We studied the sensitivity of sublethal concentrations of chlorpyrifos in Rhinella arenarum tadpoles over on two fitness related thermal traits: locomotor swimming performance and thermal tolerance limits (CTmax = critical thermal maximum and CTmin = critical thermal minimum). Our result shows a decrease in the locomotor performance of R. arenarum tadpoles with increasing sublethal chlorpyrifos concentrations. The experimental temperature increased locomotor performance but this being only significant for the control whereas tadpoles raised at any sublethal chlorpyrifos concentration did not increase their total swimming distance with temperature (Concentration × Temperature interaction, P < 0.019). Chlorpyrifos toxicity decreases maximum swimming distance but this reduction not compensated at high temperatures that do enhance swimming performance in the control treatment. On the other hand, higher chlorpyrifos sensitivity in CTmax than CTmin since tadpoles exposed to all polluted treatments exhibits a significant decline in CTmax but not in CTmin. Current global warming and the increase of atypical climatic events, such as heat waves may put at risk the larval chlorpyrifos polluted populations of R. arenarum. Our results show that the sublethal concentrations of the chlorpyrifos pesticide may affect the fitness and survival of the larvae of R. arenarum.
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Affiliation(s)
- Lorena B Quiroga
- Instituto de Ciencias Básicas (ICB), Facultad de Filosofía Humanidades y Artes, Universidad Nacional de San Juan, Av. José Ignacio de la Roza 230 (O), Capital, CP 5400, San Juan, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Avenida Rivadavia 1917, CP C1083ACA, Ciudad Autónoma de Buenos Aires, Argentina.
| | - Eduardo A Sanabria
- Instituto de Ciencias Básicas (ICB), Facultad de Filosofía Humanidades y Artes, Universidad Nacional de San Juan, Av. José Ignacio de la Roza 230 (O), Capital, CP 5400, San Juan, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Avenida Rivadavia 1917, CP C1083ACA, Ciudad Autónoma de Buenos Aires, Argentina.
| | - Miguel W Fornés
- Laboratorio de Investigaciones Andrológicas de Mendoza (LIAM), Instituto de Histología y Embriología de Mendoza (IHEM), Facultad de Ciencias Médicas, Universidad Nacional de Cuyo, CP 5500, Mendoza, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Avenida Rivadavia 1917, CP C1083ACA, Ciudad Autónoma de Buenos Aires, Argentina.
| | - Daniel A Bustos
- Instituto de Ciencias Básicas (ICB), Facultad de Filosofía Humanidades y Artes, Universidad Nacional de San Juan, Av. José Ignacio de la Roza 230 (O), Capital, CP 5400, San Juan, Argentina.
| | - Miguel Tejedo
- Departamento de Ecología Evolutiva, Estación Biológica de Doñana, CSIC, Avda. Américo Vespucio s/n, 41092, Sevilla, Spain.
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27
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Zhang W, Cheng C, Chen L, Deng Y, Zhang L, Li Y, Qin Y, Diao J, Zhou Z. Enantioselective toxic effects of cyproconazole enantiomers against Rana nigromaculata. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2018; 243:1825-1832. [PMID: 30408870 DOI: 10.1016/j.envpol.2018.09.060] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Revised: 09/06/2018] [Accepted: 09/11/2018] [Indexed: 06/08/2023]
Abstract
The environmental contaminant, especially pesticides, threatened the amphibian population. In this assay, the enantioselective behavior of cyproconazole on Rana nigromaculata was studied. We found LC50 (lethal concentration causing 50% mortality) of 4-enantiomers was nearly twice as 3-enantiomers in 96 h acute toxicity test. Besides, the significant considerable variation of oxidative stress and LDH (lactic dehydrogenase) induced by the four enantiomers indicated that cyproconazole could enantioselectively affect enzymes in tadpoles. Bioaccumulation experiments showed the order of cyproconazole in the tadpoles was 4-enantiomers>3- enantiomers>2- enantiomers>1- enantiomers during the exposure for 28d. In tissue distribution test, cyproconazole was formed and accumulated in order of 4-enantiomers>2-enantiomers>3- enantiomers>1- enantiomers, except that in the gut. During the elimination experiment, cyproconazole was rapidly eliminated by 95% within the only 24 h. These results suggested that the influence of enantioselective behavior should consider when assessing ecological risk of chiral pesticides to amphibians.
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Affiliation(s)
- Wenjun Zhang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Yuanmingyuan West Road 2, Beijing 100193, China; Department of Applied Chemistry, China Agricultural University, Yuanmingyuan West Road 2, Beijing, 100193, China
| | - Cheng Cheng
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Yuanmingyuan West Road 2, Beijing 100193, China; Department of Applied Chemistry, China Agricultural University, Yuanmingyuan West Road 2, Beijing, 100193, China
| | - Li Chen
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Yuanmingyuan West Road 2, Beijing 100193, China; Department of Applied Chemistry, China Agricultural University, Yuanmingyuan West Road 2, Beijing, 100193, China
| | - Yue Deng
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Yuanmingyuan West Road 2, Beijing 100193, China; Department of Applied Chemistry, China Agricultural University, Yuanmingyuan West Road 2, Beijing, 100193, China
| | - Luyao Zhang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Yuanmingyuan West Road 2, Beijing 100193, China; Department of Applied Chemistry, China Agricultural University, Yuanmingyuan West Road 2, Beijing, 100193, China
| | - Yao Li
- College of Resources and Environment, Henan Agricultural University, Wenhua Road 95, ZhengZhou, Henan, 450002, China
| | - Yinan Qin
- Department of Applied Chemistry, China Agricultural University, Yuanmingyuan West Road 2, Beijing, 100193, China
| | - Jinling Diao
- Department of Applied Chemistry, China Agricultural University, Yuanmingyuan West Road 2, Beijing, 100193, China
| | - Zhiqiang Zhou
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Yuanmingyuan West Road 2, Beijing 100193, China; Department of Applied Chemistry, China Agricultural University, Yuanmingyuan West Road 2, Beijing, 100193, China.
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Jones DK, Yates EK, Mattes BM, Hintz WD, Schuler MS, Relyea RA. Timing and frequency of sublethal exposure modifies the induction and retention of increased insecticide tolerance in wood frogs (Lithobates sylvaticus). ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2018; 37:2188-2197. [PMID: 29786147 DOI: 10.1002/etc.4177] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Revised: 04/16/2018] [Accepted: 05/21/2018] [Indexed: 06/08/2023]
Abstract
Although the paradigm for increased tolerance to pesticides has been by selection on constitutive (naïve) traits, recent research has shown it can also occur through phenotypic plasticity. However, the time period in which induction can occur, the duration of induced tolerance, and the influence of multiple induction events remain unknown. We hypothesized that the induction of increased pesticide tolerance is limited to early sensitive periods, the magnitude of induced tolerance depends on the number of exposures, and the retention of induced tolerance depends on the time elapsed after an exposure and the number of exposures. To test these hypotheses, we exposed wood frog tadpoles to either a no-carbaryl control (water) or 0.5 mg/L carbaryl at 4 time periods, and later tested their tolerance to carbaryl using time-to-death assays. We discovered that tadpoles induced increased tolerance early and midway but not late in our experiment and their constitutive tolerance increased with age. We found no difference in the magnitude of induced tolerance after a single or 2 exposures. Finally, induced pesticide tolerance was reversed within 6 d but was retained only when tadpoles experienced all 4 consecutive exposures. Phenotypic plasticity provides an immediate response for sensitive amphibian larvae to early pesticide exposures and reduces phenotypic mismatches in aquatic environments contaminated by agrochemicals. Environ Toxicol Chem 2018;37:2188-2197. © 2018 SETAC.
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Affiliation(s)
- Devin K Jones
- Darrin Fresh Water Institute, Department of Biological Sciences, Rensselaer Polytechnic Institute, Troy, New York, USA
| | - Erika K Yates
- Darrin Fresh Water Institute, Department of Biological Sciences, Rensselaer Polytechnic Institute, Troy, New York, USA
| | - Brian M Mattes
- Darrin Fresh Water Institute, Department of Biological Sciences, Rensselaer Polytechnic Institute, Troy, New York, USA
| | - William D Hintz
- Darrin Fresh Water Institute, Department of Biological Sciences, Rensselaer Polytechnic Institute, Troy, New York, USA
| | - Matthew S Schuler
- Darrin Fresh Water Institute, Department of Biological Sciences, Rensselaer Polytechnic Institute, Troy, New York, USA
| | - Rick A Relyea
- Darrin Fresh Water Institute, Department of Biological Sciences, Rensselaer Polytechnic Institute, Troy, New York, USA
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Wrubleswski J, Reichert FW, Galon L, Hartmann PA, Hartmann MT. Acute and chronic toxicity of pesticides on tadpoles of Physalaemus cuvieri (Anura, Leptodactylidae). ECOTOXICOLOGY (LONDON, ENGLAND) 2018; 27:360-368. [PMID: 29397473 DOI: 10.1007/s10646-018-1900-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 01/12/2018] [Indexed: 06/07/2023]
Abstract
Brazil is the largest consumer of pesticides in the world. However, knowledge on how these pesticides affect wildlife is scarce. Among the vertebrates, amphibians are particularly important in research to assess the impact of pesticides because of the correlation between pesticide and the decline of these species. This study aimed to evaluate the acute and chronic toxicity of commercial formulations of pesticides, i.e., atrazine (herbicide), cypermethrin (insecticide), and tebuconazole (fungicide) in Physalaemus cuvieri tadpoles. Eggs were collected in nature and cultivated under controlled conditions in the laboratory. Toxicity tests were carried out under standard conditions to determine the lethal concentration (LC50) after 96 h of exposure and to determine the effect of sublethal concentrations after 7 days. In addition, we performed swimming activity tests on tadpoles exposed to sublethal concentrations. The lethal concentration (LC50) was 19.69 mg/L for atrazine, 0.24 mg/L for cypermethrin and 0.98 mg/L for tebuconazole. In the acute test, atrazine showed lower toxicity than cypermethrin and tebuconazole for P. cuvieri. Swimming activity was affected at sublethal doses of atrazine and cypermethrin, but was not after exposure to tebuconazole. Cypermethrin was the insecticide that most altered the swimming activity of the individuals tested. The risk evaluation analysis indicated risks for tadpoles exposed to three tested pesticides, specially cypermethrin.
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Affiliation(s)
| | | | - Leandro Galon
- Universidade Federal da Fronteira Sul, Campus Erechim, Brazil. ERS 135 - Km 72, nº 200, Erechim, RS, Brazil
| | - Paulo Afonso Hartmann
- Universidade Federal da Fronteira Sul, Campus Erechim, Brazil. ERS 135 - Km 72, nº 200, Erechim, RS, Brazil
| | - Marilia Teresinha Hartmann
- Universidade Federal da Fronteira Sul, Campus Erechim, Brazil. ERS 135 - Km 72, nº 200, Erechim, RS, Brazil.
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Ockleford C, Adriaanse P, Berny P, Brock T, Duquesne S, Grilli S, Hernandez-Jerez AF, Bennekou SH, Klein M, Kuhl T, Laskowski R, Machera K, Pelkonen O, Pieper S, Stemmer M, Sundh I, Teodorovic I, Tiktak A, Topping CJ, Wolterink G, Aldrich A, Berg C, Ortiz-Santaliestra M, Weir S, Streissl F, Smith RH. Scientific Opinion on the state of the science on pesticide risk assessment for amphibians and reptiles. EFSA J 2018; 16:e05125. [PMID: 32625798 PMCID: PMC7009658 DOI: 10.2903/j.efsa.2018.5125] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Following a request from EFSA, the Panel on Plant Protection Products and their Residues developed an opinion on the science to support the potential development of a risk assessment scheme of plant protection products for amphibians and reptiles. The coverage of the risk to amphibians and reptiles by current risk assessments for other vertebrate groups was investigated. Available test methods and exposure models were reviewed with regard to their applicability to amphibians and reptiles. Proposals were made for specific protection goals aiming to protect important ecosystem services and taking into consideration the regulatory framework and existing protection goals for other vertebrates. Uncertainties, knowledge gaps and research needs were highlighted.
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Exposure to a cyanobacterial toxin increases larval amphibian susceptibility to parasitism. Parasitol Res 2017; 117:513-520. [PMID: 29270769 DOI: 10.1007/s00436-017-5727-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Accepted: 12/15/2017] [Indexed: 10/18/2022]
Abstract
Anthropogenic activities are promoting the proliferation of aquatic primary producers in freshwater habitats, including cyanobacteria. Among various problems stemming from eutrophication, cyanobacterial blooms can be toxic due to the production of secondary compounds, including microcystins such as microcystin-LR (MC-LR); however, it is unknown whether cyanotoxins can affect the susceptibility of aquatic vertebrates such as fish and larval amphibians to parasites or pathogens even though infectious diseases can significantly affect natural populations. Here, we examined how exposure to environmentally relevant concentrations of MC-LRs affected the resistance of larval amphibians (northern leopard frog, Rana pipiens) to infection by a helminth parasite (the trematode Echinostoma sp.), and whether this was manifested by reductions in host anti-parasite behavior. Exposure to a relatively high (82 μg L-1) concentration of MC-LR caused over 70% mortality, and tadpoles that survived exposure to the low MC-LR (11 μg L-1) treatment had significantly higher infection intensities than those in the control; however, anti-parasite behavior was not affected by treatment. Our results indicate that MC-LR can have both direct and indirect negative effects on larval amphibians by increasing their mortality and susceptibility to parasitism, which may have implications for other aquatic vertebrates in eutrophic habitats dominated by cyanobacteria as well.
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Thompson SJ, Pearce JM, Ramey AM. Vectors, Hosts, and Control Measures for Zika Virus in the Americas. ECOHEALTH 2017; 14:821-839. [PMID: 29150828 DOI: 10.1007/s10393-017-1277-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2017] [Revised: 08/11/2017] [Accepted: 08/14/2017] [Indexed: 06/07/2023]
Abstract
We examine Zika virus (ZIKV) from an ecological perspective and with a focus on the Americas. We assess (1) the role of wildlife in ZIKV disease ecology, (2) how mosquito behavior and biology influence disease dynamics, and (3) how nontarget species and ecosystems may be impacted by vector control programs. Our review suggests that free-ranging, non-human primates may be involved in ZIKV transmission in the Old World; however, other wildlife species likely play a limited role in maintaining or transmitting ZIKV. In the Americas, a zoonotic cycle has not yet been definitively established. Understanding behaviors and habitat tolerances of Aedes aegypti and Aedes albopictus, two ZIKV competent vectors in the Americas, will allow more accurate modeling of disease spread and facilitate targeted and effective control efforts. Vector control efforts may have direct and indirect impacts to wildlife, particularly invertebrate feeding species; however, strategies could be implemented to limit detrimental ecological effects.
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Affiliation(s)
- Sarah J Thompson
- U.S. Geological Survey, Alaska Science Center, 4210 University Drive, Anchorage, AK, USA.
| | - John M Pearce
- U.S. Geological Survey, Alaska Science Center, 4210 University Drive, Anchorage, AK, USA
| | - Andrew M Ramey
- U.S. Geological Survey, Alaska Science Center, 4210 University Drive, Anchorage, AK, USA
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Sievers M, Hale R, Parris KM, Swearer SE. Impacts of human‐induced environmental change in wetlands on aquatic animals. Biol Rev Camb Philos Soc 2017; 93:529-554. [DOI: 10.1111/brv.12358] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2017] [Revised: 06/30/2017] [Accepted: 07/05/2017] [Indexed: 01/05/2023]
Affiliation(s)
- Michael Sievers
- School of BioSciences The University of Melbourne Parkville Victoria 3010 Australia
- School of Ecosystem and Forest Sciences The University of Melbourne Parkville Victoria 3010 Australia
| | - Robin Hale
- School of BioSciences The University of Melbourne Parkville Victoria 3010 Australia
| | - Kirsten M. Parris
- School of Ecosystem and Forest Sciences The University of Melbourne Parkville Victoria 3010 Australia
| | - Stephen E. Swearer
- School of BioSciences The University of Melbourne Parkville Victoria 3010 Australia
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Triana Velásquez TM, Henao Muñoz LM, Bernal Bautista MH. TOXICIDAD AGUDA DEL INSECTICIDA CIPERMETRINA (CYPERMON® 20 EC) EN CUATRO ESPECIES DE ANUROS COLOMBIANOS. ACTA BIOLÓGICA COLOMBIANA 2017. [DOI: 10.15446/abc.v22n3.62631] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
El insecticida cipermetrina (CY) es usado en la agricultura para el control de plagas; sin embargo, por su acción neurotóxica puede afectar organismos no blanco como los anuros. El objetivo del trabajo fue determinar la toxicidad (concentración letal media: CL50, y algunos efectos subletales: retrasos en el desarrollo, capacidad de natación y longitud total de las larvas) del insecticida CY (Cypermon® 20EC) expuesto durante 96 horas en embriones y renacuajos de cuatro especies de anuros bajo pruebas de laboratorio y microcosmos. Los embriones de Rhinella humboldti fueron los más sensibles en condiciones de laboratorio (CL50= 6,27 mg/L) y Boana xerophylla en microcosmos (CL50= 88,32 mg/ha), mientras que los de Engystomops pustulosus fueron los más resistentes (laboratorio: CL50= 11,80 mg/L; microcosmos: CL50= 112,37 mg/ha). Rhinella marina mostró una sensibilidad intermedia. En los renacuajos no fue posible calcular los valores CL50 debido a la alta mortalidad registrada en las concentraciones experimentales en laboratorio y microcosmos, las cuales fueron 40 y 122 veces menores al valor de aplicación del insecticida (500 mg/L y 1,52 mg/ha, respectivamente). Por otra parte, se encontró una reducción significante en la longitud total y la capacidad de natación de las larvas obtenidas de los embriones expuestos a la CY, pero no en el tiempo de desarrollo. En conclusión, la exposición a la cipermetrina provocó una letalidad alta en los renacuajos y efectos subletales en estadíos tempranos del desarrollo, por lo que a las concentraciones recomendadas de aplicación, este insecticida es tóxico para las especies de estudio.
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Yahnke AE, Grue CE, Hayes MP, Pearman-Gillman S. Effects of the herbicide triclopyr on metamorphic northern red-legged frogs. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2017; 36:2316-2326. [PMID: 28186362 DOI: 10.1002/etc.3767] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Revised: 09/14/2016] [Accepted: 02/09/2017] [Indexed: 05/25/2023]
Abstract
Aquatic herbicides are used to manage invasive emergent plants in and around wetlands. Metamorphic frogs that emerge during the aquatic weed management season may be at risk of herbicide exposure. Metamorphic northern red-legged frogs (Rana aurora) were exposed to a triclopyr tank mix labeled for control of broadleaf emergent aquatic weeds such as invasive purple loosestrife (Lythrum salicaria). The tank mix consisted of Renovate® 3 (triclopyr triethylamine salt 44.4%), the modified vegetable oil surfactant Competitor®, and the marker dye Hi-Light® . Metamorphs were exposed to the tank mix and a clean-water control for 96 h, and then reared in clean water for 60 d. Exposure to the tank mix resulted in no treatment-related mortalities, no effects on behavior immediately post exposure, and no effects on body or liver condition indices. Exposure to the tank mix resulted in lethargy during exposure and a 1-d delay in completion of metamorphosis. Deformities present in the rearing population confounded results for some endpoints. Observed effects were minimal, especially compared with the potential for ecological impacts from unmanaged invasive plants. Environ Toxicol Chem 2017;36:2316-2326. © 2017 SETAC.
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Affiliation(s)
- Amy E Yahnke
- Washington Cooperative Fish and Wildlife Research Unit, School of Aquatic and Fishery Sciences, University of Washington, Seattle, Washington, USA
| | - Christian E Grue
- Washington Cooperative Fish and Wildlife Research Unit, School of Aquatic and Fishery Sciences, University of Washington, United States Geological Survey, Seattle, Washington, USA
| | - Marc P Hayes
- Habitat Program, Washington Department of Fish and Wildlife, Olympia, Washington, USA
| | - Schuyler Pearman-Gillman
- Washington Cooperative Fish and Wildlife Research Unit, School of Aquatic and Fishery Sciences, University of Washington, Seattle, Washington, USA
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36
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Freitas JS, Teresa FB, de Almeida EA. Influence of temperature on the antioxidant responses and lipid peroxidation of two species of tadpoles (Rhinella schneideri and Physalaemus nattereri) exposed to the herbicide sulfentrazone (Boral 500SC®). Comp Biochem Physiol C Toxicol Pharmacol 2017; 197:32-44. [PMID: 28457947 DOI: 10.1016/j.cbpc.2017.04.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Revised: 04/20/2017] [Accepted: 04/25/2017] [Indexed: 11/19/2022]
Abstract
Amphibians can experience large temperature fluctuations in their habitats, especially during the larval stage, when tadpoles are restricted to small and ephemeral ponds. Changes in water temperature can alter development, metabolism and behaviour of cold-blooded animals but also the toxicokinetics of chemicals in the environment. In Brazil, pesticides application is intensified during the rainy season, which is the period of reproduction for many amphibian species. We evaluated here the influence of temperature (28, 32, and 36°C) on the toxicity of the herbicide sulfentrazone (Boral®SC) in tadpoles of Physalaemus nattereri and Rhinella schneideri, by analysis of oxidative stress biomarkers. Exposure of tadpoles to sulfentrazone altered the antioxidant enzymes activities and induced lipid peroxidation with temperature-associated responses. Catalase, superoxide dismutase and glucose-6-phosphate dehydrogenase (G6PDH) were impaired by combined effect of temperature and sulfentrazone in both species. G6PDH was increased in most groups exposed to 36°C. Biotransformation enzyme glutathione-S-transferase had more evident alterations in P. nattereri at higher temperatures and changes in tGSH contents presented different patterns between the species. Lipid peroxidation was particularly induced in tadpoles of P. nattereri. Integrated biomarker response (IBR) index indicated a synergic effect of temperature and sulfentrazone for tadpoles of P. nattereri, while the IBR was mainly influenced by temperature in R. schneideri. Our study showed that temperature modulates biochemical responses in tadpoles exposed to sulfentrazone with a species-specific pattern. These findings imply that the effects of abiotic factors should be taken into account to evaluate the real risks of exposure of amphibians to commonly used pesticides.
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Affiliation(s)
- Juliane Silberschmidt Freitas
- Graduate Program in Animal Biology, Department of Chemistry and Environmental Sciences, Universidade Estadual Paulista "Júlio de Mesquita Filho", Cristóvão Colombo, 2265, 15054-000 São José do Rio Preto, SP, Brazil
| | - Fabrício Barreto Teresa
- Universidade Estadual de Goiás, Campus de Ciências Exatas e Tecnológicas, BR 153 n° 3105 - Fazenda Barreiro do Meio, CEP: 75132-903 Anápolis, GO, Brazil
| | - Eduardo Alves de Almeida
- Department of Natural Sciences, Fundação Universidade Regional de Blumenau, Av. Antonio da Veiga 140, Itoupava Seca, 89030-903 Blumenau, Santa Catarina, Brazil.
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Mikó Z, Ujszegi J, Hettyey A. Age-dependent changes in sensitivity to a pesticide in tadpoles of the common toad (Bufo bufo). AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2017; 187:48-54. [PMID: 28365461 DOI: 10.1016/j.aquatox.2017.03.016] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Revised: 03/17/2017] [Accepted: 03/19/2017] [Indexed: 06/07/2023]
Abstract
The worldwide en masse application of pesticides and the frequently reported malign effects on several non-target organisms underpin the importance of ecotoxicological research on these anthropogenic pollutants. Previous studies showed that sensitivity to herbicides can vary widely depending on additional stress factors, on the species and even on the population investigated. However, there is little information about how sensitivity changes during ontogeny, and how the duration of exposure is linked to the magnitude of malign effects, even though this knowledge would be important for the interpretation of toxicity test results and for formulating recommendations regarding the timing of pesticide application. We exposed tadpoles of the common toad (Bufo bufo) to three concentrations (0, 2 and 4mg a.e./L) of a glyphosate-based herbicide during the 1st, 2nd, 3rd, 4th, or 5th period of larval development or during the entire experiment, and measured survival, time until metamorphosis and body mass at metamorphosis to estimate fitness-consequences. Younger tadpoles were more sensitive to the herbicide in all measured traits than older ones, and this age-dependence was especially pronounced at the high herbicide concentration. Furthermore, tadpoles exposed to the herbicide during the entire experiment developed slower than tadpoles exposed only early on, but we did not observe a similar effect either on body mass or survival. The observed age-dependence of sensitivity to herbicides draws attention to the fact that results of toxicity tests obtained for one age-class are not necessarily generalizable across ontogeny. Also, the age of test animals has to be considered when planning ecotoxicological studies and interpreting their results. Finally, taking into account the temporal breeding habits of local amphibians when planning pesticide application would be highly favourable: if tadpoles would not get exposed to the herbicide during their most sensitive early development, they would sustain less anthropogenic damage from our efforts of controlling weeds.
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Affiliation(s)
- Zsanett Mikó
- Lendület Evolutionary Ecology Research Group, Plant Protection Institute, Centre for Agricultural Research, Hungarian Academy of Sciences, Herman Ottó út 15, Budapest 1022, Hungary.
| | - János Ujszegi
- Lendület Evolutionary Ecology Research Group, Plant Protection Institute, Centre for Agricultural Research, Hungarian Academy of Sciences, Herman Ottó út 15, Budapest 1022, Hungary; Department of Systematic Zoology and Ecology, Eötvös Loránd University, Pázmány Péter sétány 1/C, Budapest 1117, Hungary
| | - Attila Hettyey
- Lendület Evolutionary Ecology Research Group, Plant Protection Institute, Centre for Agricultural Research, Hungarian Academy of Sciences, Herman Ottó út 15, Budapest 1022, Hungary
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38
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Xu P, Huang L. Effects of α-cypermethrin enantiomers on the growth, biochemical parameters and bioaccumulation in Rana nigromaculata tadpoles of the anuran amphibians. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2017; 139:431-438. [PMID: 28208115 DOI: 10.1016/j.ecoenv.2017.02.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Revised: 02/09/2017] [Accepted: 02/09/2017] [Indexed: 06/06/2023]
Abstract
Populations of many amphibian species are declining worldwide in part because of pesticide contamination. As a surface water contaminant, α-cypermethrin may have severe ecological impacts on amphibians. Here, we examined the acute toxicity of α-cypermethrin enantiomers to dark-spotted frog Rana nigromaculata tadpoles at 24, 48, 72 and 96h, finding that the tadpoles were indeed sensitive to α-cypermethrin. The (S)-(1R, 3R)-enantiomer was approximately 29 times more toxic than the (R)-(1S, 3S)-enantiomer at 96h. A significant delayed growth in R. nigromaculata tadpoles after exposure to 0.5µgL-1 of S-(1R, 3R)-cypermethrin was observed. Additionally, increased superoxide dismutase (SOD), catalase (CAT), glutathione-S-transferase (GST) and malondialdehyde (MDA) levels indicate the presence of oxidative stress in the tadpoles. Further, tadpoles exposed to sublethal concentrations of α-cypermethrin enantiomers exhibited enantioselective growth and oxidative damage. Bioaccumulation experiments showed that the tadpoles could rapidly accumulate α-cypermethrin. The (R)-(1S, 3S)-enantiomer was preferentially accumulated over the (S)-(1R, 3R)-enantiomer, and it was also eliminated more quickly, as evidenced in the subsequent depuration experiments.
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Affiliation(s)
- Peng Xu
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing RD 18, Beijing 100085, China
| | - Ledan Huang
- School of Materials Science and Engineering, Beijing Institute of Fashion Technology, Yinghua RD 2, Beijing 100029, China.
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Strong R, Martin FL, Jones KC, Shore RF, Halsall CJ. Subtle effects of environmental stress observed in the early life stages of the Common frog, Rana temporaria. Sci Rep 2017; 7:44438. [PMID: 28317844 PMCID: PMC5357840 DOI: 10.1038/srep44438] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Accepted: 02/08/2017] [Indexed: 01/01/2023] Open
Abstract
Worldwide amphibian populations are declining due to habitat loss, disease and pollution. Vulnerability to environmental contaminants such as pesticides will be dependent on the species, the sensitivity of the ontogenic life stage and hence the timing of exposure and the exposure pathway. Herein we investigated the biochemical tissue 'fingerprint' in spawn and early-stage tadpoles of the Common frog, Rana temporaria, using attenuated total reflection-Fourier-transform infrared (ATR-FTIR) spectroscopy with the objective of observing differences in the biochemical constituents of the respective amphibian tissues due to varying water quality in urban and agricultural ponds. Our results demonstrate that levels of stress (marked by biochemical constituents such as glycogen that are involved in compensatory metabolic mechanisms) can be observed in tadpoles present in the pond most impacted by pollution (nutrients and pesticides), but large annual variability masked any inter-site differences in the frog spawn. ATR-FTIR spectroscopy is capable of detecting differences in tadpoles that are present in selected ponds with different levels of environmental perturbation and thus serves as a rapid and cost effective tool in assessing stress-related effects of pollution in a vulnerable class of organism.
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Affiliation(s)
- Rebecca Strong
- Lancaster Environment Centre, Lancaster University, Bailrigg, Lancaster LA1 4YQ, UK
| | - Francis L Martin
- School of Pharmacy and Biomedical Sciences, University of Central Lancashire (UCLan), Preston PR1 2HE, UK
| | - Kevin C Jones
- Lancaster Environment Centre, Lancaster University, Bailrigg, Lancaster LA1 4YQ, UK
| | - Richard F Shore
- Centre for Ecology and Hydrology, Lancaster University, Bailrigg, Lancaster LA1 4YQ, UK
| | - Crispin J Halsall
- Lancaster Environment Centre, Lancaster University, Bailrigg, Lancaster LA1 4YQ, UK
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40
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Jones DK, Dang TD, Urbina J, Bendis RJ, Buck JC, Cothran RD, Blaustein AR, Relyea RA. Effect of Simultaneous Amphibian Exposure to Pesticides and an Emerging Fungal Pathogen, Batrachochytrium dendrobatidis. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:671-679. [PMID: 28001054 DOI: 10.1021/acs.est.6b06055] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Amphibian declines have been linked to numerous factors, including pesticide use and the fungal pathogen Batrachochytrium dendrobatidis (Bd). Moreover, research has suggested a link between amphibian sensitivity to Bd and pesticide exposure. We simultaneously exposed postmetamorphic American toads (Anaxyrus americanus), western toads (A. boreas), spring peepers (Pseudacris crucifer), Pacific treefrogs (P. regilla), leopard frogs (Lithobates pipiens), and Cascades frogs (Rana cascadae) to a factorial combination of two pathogen treatments (Bd+, Bd-) and four pesticide treatments (control, ethanol vehicle, herbicide mixture, and insecticide mixture) for 14 d to quantify survival and infection load. We found no interactive effects of pesticides and Bd on anuran survival and no effects of pesticides on infection load. Mortality following Bd exposure increased in spring peepers and American toads and was dependent upon snout-vent length in western toads, American toads, and Pacific treefrogs. Previous studies reported effects of early sublethal pesticide exposure on amphibian Bd sensitivity and infection load at later life stages, but we found simultaneous exposure to sublethal pesticide concentrations and Bd had no such effect on postmetamorphic juvenile anurans. Future research investigating complex interactions between pesticides and Bd should employ a variety of pesticide formulations and Bd strains and follow the effects of exposure throughout ontogeny.
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Affiliation(s)
- Devin K Jones
- Department of Biological Sciences, Rensselaer Polytechnic Institute , Troy, New York 12180, United States
| | | | | | - Randall J Bendis
- Department of Biological Sciences, University of Pittsburgh , Pittsburgh, Pennsylvania 15260, United States
| | - Julia C Buck
- Marine Science Institute, University of California Santa Barbara , Santa Barbara, California 93106, United States
| | - Rickey D Cothran
- Department of Biological Sciences, Southwestern Oklahoma State University , Weatherford, Oklahoma 73096, United States
| | | | - Rick A Relyea
- Department of Biological Sciences, Rensselaer Polytechnic Institute , Troy, New York 12180, United States
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41
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Wagner N, Veith M, Lötters S, Viertel B. Population and life-stage-specific effects of two herbicide formulations on the aquatic development of European common frogs (Rana temporaria). ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2017; 36:190-200. [PMID: 27291460 DOI: 10.1002/etc.3525] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2015] [Revised: 01/15/2016] [Accepted: 06/09/2016] [Indexed: 05/02/2023]
Abstract
Environmental contamination is suggested to contribute to amphibian population declines. However, the effects of a contaminant on a particular amphibian species can differ among populations. The authors investigated the toxic effects of 2 herbicide formulations on different populations and on representative developmental stages of the European common frog (Rana temporaria). Larvae from forest populations were more sensitive to a commonly used glyphosate-based herbicide compared with individuals from agrarian land. Median lethal concentrations correlated with measured glyphosate levels in the breeding ponds, which may be a sign of evolved tolerances. The reverse result was observed for a less commonly used cycloxydim-based herbicide. Effects of the glyphosate-based herbicide were stronger for earlier larval stages compared with later larval stages. Hence, applications in early spring (when early larvae are present in breeding ponds) pose greater risk concerning acute toxic effects on R. temporaria. With regard to late larval stages, short exposure (96 h) of prometamorphic larvae prolonged time to metamorphosis, but only at the highest test concentration that did not significantly induce mortality. This could be due to impairment of the thyroid axis. Notably, nearly all test concentrations of the 2 herbicides provoked growth retardation. Further research on how evolved or induced tolerances are acquired, actual contamination levels of amphibian habitats, and potential endocrine effects of glyphosate-based herbicides is necessary. Environ Toxicol Chem 2017;36:190-200. © 2016 SETAC.
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Affiliation(s)
- Norman Wagner
- Trier University, Department of Biogeography, Trier, Germany
| | - Michael Veith
- Trier University, Department of Biogeography, Trier, Germany
| | - Stefan Lötters
- Trier University, Department of Biogeography, Trier, Germany
| | - Bruno Viertel
- Trier University, Department of Biogeography, Trier, Germany
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42
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Wagner N, Müller H, Viertel B. Effects of a commonly used glyphosate-based herbicide formulation on early developmental stages of two anuran species. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:1495-1508. [PMID: 27785717 DOI: 10.1007/s11356-016-7927-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2016] [Accepted: 10/16/2016] [Indexed: 05/02/2023]
Abstract
Environmental contamination, especially due to the increasing use of pesticides, is suggested to be one out of six main reasons for the global amphibian decline. Adverse effects of glyphosate-based herbicides on amphibians have been already discussed in several studies with different conclusions, especially regarding sublethal effects at environmentally relevant concentrations. Therefore, we studied the acute toxic effects (mortality, growth, and morphological changes) of the commonly used glyphosate-based herbicide formulation Roundup® UltraMax on early aquatic developmental stages of two anuran species with different larval types (obligate vs. facultative filtrating suspension feeders), the African clawed frog (Xenopus laevis) and the Mediterranean painted frog (Discoglossus pictus). While X. laevis is an established anuran model organism in amphibian toxicological studies, we aim to establish D. pictus as another model for species with facultative filtrating larvae. A special focus of the present study lies on malformations in X. laevis embryos, which were investigated using histological preparations. In general, embryos and larvae of X. laevis reacted more sensitive concerning lethal effects compared to early developmental stages of D. pictus. It was suggested, that especially the different morphology of their filter apparatus and the higher volume of water pumped through the buccopharynx of X. laevis larvae lead to higher exposure to the formulation. The test substance induced similar lethal effects in D. pictus larvae as it does in the teleost standard test organism used in pesticide approval, the rainbow trout (Oncorhynchus mykiss), whereas embryos of both species are apparently more tolerant and, conversely, X. laevis larvae about two times more sensitive. In both species, early larvae always reacted significantly more sensitive than embryos. Exposure to the test substance increased malformation rates in embryos of both species in a concentration-dependent manner, but not at environmentally relevant concentrations. However, the assumed field safety, based on calculated surface water concentrations of the active ingredient (glyphosate), should be validated with realistic field data and buffer strips have to be urgently regarded to any aquatic amphibian habitat.
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Affiliation(s)
- Norman Wagner
- Department of Biogeography, Trier University, Universitätsring 15, 54296, Trier, Germany.
| | - Hendrik Müller
- Department of Systematic Zoology and Evolutionary Biology with Phyletic Museum, Friedrich-Schiller-University Jena, Erbertstr. 1, 07743, Jena, Germany
| | - Bruno Viertel
- Department of Biogeography, Trier University, Universitätsring 15, 54296, Trier, Germany
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Kaczmarski M, Kolenda K, Rozenblut-Kościsty B, Sośnicka W. Phalangeal bone anomalies in the European common toad Bufo bufo from polluted environments. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:21940-21946. [PMID: 27535156 PMCID: PMC5099355 DOI: 10.1007/s11356-016-7297-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/07/2016] [Accepted: 07/20/2016] [Indexed: 06/06/2023]
Abstract
Every spring, many of amphibians are killed by motor vehicles on roads. These road-killed animals can be used as valuable material for non-invasive studies showing the effect of environmental pollution on amphibian populations. The aims of our research were to check whether the phalanges of road-killed toads may be useful as material for histological analysis, and whether various degrees of human impact influence the level in bone abnormalities in the common toad. We also examined whether the sex and age structure of toads can differ significantly depending in the different sites. We chose three toad breeding sites where road-killed individuals had been observed: near the centre of a city, the outskirts of a city, and a rural site. We collected dead individuals during spring migration in 2013. The sex of each individual was determined and the toes were used to determine age using the skeletochronology method. While performing age estimates, we looked for abnormalities in relation to normal bone tissue structure. In urban site, females dominate males (sex ratio 2.6:1), but in populations from rural and semi-urban sites, sex ratio was reverse (1:2.2 and 1:1.4, respectively). However, we did not find any significant differences between age structure of all populations (average age of each population: approximately 4 years). We observed abnormalities in more than 80 % of all toads from the city, compared to approximately 20 % from the rural and semi-urban sites. In particular, we found hypertrophic bone cells, misaligned intercellular substance, and irregular outer edges of bones. We suggest that these malformations are caused by different pollution, e.g. with heavy metals.
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Affiliation(s)
- Mikołaj Kaczmarski
- Institute of Zoology, Poznan University of Life Sciences, Wojska Polskiego 71 C, 60-625, Poznań, Poland
| | - Krzysztof Kolenda
- Department of Vertebrate Biology and Conservation, University of Wroclaw, Sienkiewicza 21, 50-335, Wrocław, Poland.
| | - Beata Rozenblut-Kościsty
- Department of Vertebrate Biology and Conservation, University of Wroclaw, Sienkiewicza 21, 50-335, Wrocław, Poland
| | - Wioletta Sośnicka
- Department of Vertebrate Biology and Conservation, University of Wroclaw, Sienkiewicza 21, 50-335, Wrocław, Poland
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Triana Velásquez TM, Henao Muñoz LM, Bernal Bautista MH. Toxicidad del herbicida Propanil (Propanil Trust® 500EC) en embriones y renacuajos de tres especies de anuros. ACTA BIOLÓGICA COLOMBIANA 2016. [DOI: 10.15446/abc.v21n3.54845] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
El Propanil es un herbicida empleado en el control de arvenses que puede afectar organismos no blanco como los anuros. El objetivo del trabajo fue evaluar los efectos letales (concentración letal media, CL50) y subletales (retrasos en el desarrollo, longitud total y máxima distancia de natación) del Propanil (Propanil Trust® 500EC) sobre embriones y renacuajos de tres especies de anuros bajo condiciones de laboratorio y microcosmos, que incluyen algunos componentes de campo (sedimentos y material vegetal). La especie más sensible fue Rhinella humboldti (embriones: laboratorio CL50= 9,14 mg/L y microcosmos CL50= 83,92 mg/ha; renacuajos: laboratorio CL50= 5,09 mg/L y microcosmos CL50= 44,52 mg/ha), y la más resistente Hypsiboas crepitans (embriones: laboratorio CL50= 19,58 mg/L y microcosmos CL50= 179,53 mg/ha; renacuajos: laboratorio CL50= 16,54 mg/L y microcosmos CL50= 190,72 mg/ha). Engystomops pustulosus mostró una sensibilidad intermedia. En general, en laboratorio los CL50 indicaron una letalidad alta y se encontraron cambios significantes en la longitud total y la máxima distancia de natación de los organismos expuestos al Propanil, contrario a los resultados en microcosmos, aunque el tiempo de desarrollo embrionario no mostró diferencias entre tratamientos. Al comparar los CL50 se encontró que los renacuajos fueron más sensibles al herbicida que los embriones. En conclusión, el Propanil resultó tóxico para los embriones y renacuajos en condiciones de laboratorio pero tuvo un efecto menor en microcosmos. Esto demuestra que los componentes de campo de los microcosmos y la falta de renovación de las soluciones reducen la toxicidad del Propanil en los anuros de estudio.
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Li M, Li S, Yao T, Zhao R, Wang Q, Zhu G. Waterborne exposure to triadimefon causes thyroid endocrine disruption and developmental delay in Xenopus laevis tadpoles. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2016; 177:190-197. [PMID: 27289584 DOI: 10.1016/j.aquatox.2016.05.018] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Revised: 05/17/2016] [Accepted: 05/21/2016] [Indexed: 06/06/2023]
Abstract
Triadimefon (TDF) is a triazole-derivative fungicide that is detectable in the environment and target agricultural products, prompting concern over its risk to wildlife and human health. In our study, Nieuwkoop & Faber stage 51 Xenopus laevis tadpoles were exposed to different nominal concentrations TDF (0, 0.112, and 1.12mg/L) for 21 days while the tadpoles were undergoing pre-morphological development. Developmental condition, bioaccumulation and thyroid hormone levels, and mRNA expression of genes involved in the hypothalamic-pituitary-thyroid (HPT) axis were examined. Exposure to TDF caused a reduction in developmental rates on pre-metamorphosis of X. laevis. TDF exposure significantly decreased thyroid hormone (T4 and T3) concentrations, indicating thyroid endocrine disruption. The downregulation of thyroglobulin and upregulation of genes related to thyroid hormone metabolism (ugt1ab) might be responsible for the decreased thyroid hormone concentrations. Treatment with TDF also significantly increased mRNA expression of genes involved in thyroid-stimulating hormone as a compensatory mechanism response to decreased thyroid hormone concentrations. Gene expression and in silico ligand docking studies were combined to study the interaction between TDF and thyroid hormone receptor. Results showed that TDF could consequently affect the HPT axis signaling pathway. In addition, bioconcentration of TDF was observed in tadpoles, indicating the bioactivity of this compound. Taken together, the results suggest that TDF alters the HPT axis-related genes and changes thyroid hormone contents in X. laevis tadpoles, thus causing thyroid endocrine disruption and consequently delaying thyroid hormones-dependent metamorphic development.
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Affiliation(s)
- Meng Li
- Institute of Pesticide and Environmental Toxicology, Zhejiang University, Hangzhou 310058, PR China
| | - Shuying Li
- Institute of Pesticide and Environmental Toxicology, Zhejiang University, Hangzhou 310058, PR China
| | - Tingting Yao
- Institute of Pesticide and Environmental Toxicology, Zhejiang University, Hangzhou 310058, PR China
| | - Renjie Zhao
- Institute of Pesticide and Environmental Toxicology, Zhejiang University, Hangzhou 310058, PR China
| | - Qiangwei Wang
- Institute of Pesticide and Environmental Toxicology, Zhejiang University, Hangzhou 310058, PR China.
| | - Guonian Zhu
- Institute of Pesticide and Environmental Toxicology, Zhejiang University, Hangzhou 310058, PR China
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Mesléard F, Gauthier-Clerc M, Lambret P. Impact of the insecticide Alphacypermetrine and herbicide Oxadiazon, used singly or in combination, on the most abundant frog in French rice fields, Pelophylax perezi. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2016; 176:24-29. [PMID: 27107241 DOI: 10.1016/j.aquatox.2016.04.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Revised: 03/30/2016] [Accepted: 04/03/2016] [Indexed: 06/05/2023]
Abstract
The potential impact of agricultural pesticides is a major concern with regard to biodiversity conservation. Pesticides are considered as one of the main causes of the worldwide decline of Amphibians. They are rarely used singly, but their cumulative impact and interaction are often neglected, as is the importance of the age or stage of the animal on which the impact of the molecules is assessed. We therefore tested the potential cumulative impact of the only authorized insecticide (Alphacypermetrine) and the main herbicide (Oxadiazon) used in French rice fields on four replicates of 25 eggs, young larvae and prometamorphosis tadpoles of the most abundant frog in paddies (Pelophylax perezi). We found no significant effect of the insecticide and herbicide, used singly or in combination, on hatching and young tadpoles. However, we found a strong impact of insecticide and herbicide used singly and a highly deleterious impact of their combined use on prometamorphosis tadpoles. Among the four replicates, only one of the prometamorphosis tadpoles did not reach this adult stage in the control against 9, 9, 6, 4 and 13, 9, 8, 7 with the herbicide and insecticide, respectively. But when the two pesticides were used in combination, only two prometamorphosis tapdoles reached the adult stage. Our results emphasize the potential impact on amphibians of pesticides used in agriculture and highlight the necessity of testing their role as cocktails. They also stress the importance of the age and/or stage of the target organism, the choice of which can lead to contrasting conclusions. Finally, our results suggest a possible underestimation of the impact of pesticides on non-targeted fauna in the rice fields in particular, and on living organisms in general.
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Affiliation(s)
- François Mesléard
- Institut de recherche de la Tour du Valat, Le Sambuc, F-13200 Arles, France; Institut Méditerranéen de Biodiversité et d'Ecologie (IMBE), UMR CNRS 7263/IRD 237 Avignon Université, Aix Marseille Université, IUT d'Avignon, 337 chemin des Meinajaries Site Agroparc BP 61207, F-84911 Avignon cedex 09, France.
| | - Michel Gauthier-Clerc
- Institut de recherche de la Tour du Valat, Le Sambuc, F-13200 Arles, France; Département Chrono-Environnement, UMR UFC/CNRS 6249 USC INRA, Université de Franche-Comté, F-25030 Besançon, France
| | - Philippe Lambret
- Institut de recherche de la Tour du Valat, Le Sambuc, F-13200 Arles, France
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Strong RJ, Halsall CJ, Ferenčík M, Jones KC, Shore RF, Martin FL. Biospectroscopy reveals the effect of varying water quality on tadpole tissues of the common frog (Rana temporaria). ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2016; 213:322-337. [PMID: 26925755 DOI: 10.1016/j.envpol.2016.02.025] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2015] [Revised: 02/11/2016] [Accepted: 02/12/2016] [Indexed: 06/05/2023]
Abstract
Amphibians are undergoing large population declines in many regions around the world. As environmental pollution from both agricultural and urban sources has been implicated in such declines, there is a need for a biomonitoring approach to study potential impacts on this vulnerable class of organism. This study assessed the use of infrared (IR) spectroscopy as a tool to detect changes in several tissues (liver, muscle, kidney, heart and skin) of late-stage common frog (Rana temporaria) tadpoles collected from ponds with differing water quality. Small differences in spectral signatures were revealed between a rural agricultural pond and an urban pond receiving wastewater and landfill run-off; these were limited to the liver and heart, although large differences in body size were apparent, surprisingly with tadpoles from the urban site larger than those from the rural site. Large differences in liver spectra were found between tadpoles from the pesticide and nutrient impacted pond compared to the rural agricultural pond, particularly in regions associated with lipids. Liver mass and hepatosomatic indices were found to be significantly increased in tadpoles from the site impacted by pesticides and trace organic chemicals, suggestive of exposure to environmental contamination. Significant alterations were also found in muscle tissue between tadpoles from these two ponds in regions associated with glycogen, potentially indicative of a stress response. This study highlights the use of IR spectroscopy, a low-cost, rapid and reagent-free technique in the biomonitoring of a class of organisms susceptible to environmental degradation.
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Affiliation(s)
- Rebecca J Strong
- Lancaster Environment Centre, Lancaster University, Bailrigg, Lancaster LA1 4YQ, UK
| | - Crispin J Halsall
- Lancaster Environment Centre, Lancaster University, Bailrigg, Lancaster LA1 4YQ, UK.
| | - Martin Ferenčík
- Povodí Labe, státní podnik, Odbor vodohospodářských Laboratory (OVHL), Víta Nejedlého 951, 500 03 Hradec Králové, Czech Republic; Institute of Environmental and Chemical Engineering, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10 Pardubice, Czech Republic
| | - Kevin C Jones
- Lancaster Environment Centre, Lancaster University, Bailrigg, Lancaster LA1 4YQ, UK
| | - Richard F Shore
- Centre for Ecology and Hydrology, Lancaster University, Bailrigg, Lancaster LA1 4YQ, UK
| | - Francis L Martin
- Lancaster Environment Centre, Lancaster University, Bailrigg, Lancaster LA1 4YQ, UK.
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Pérez-Iglesias JM, Franco-Belussi L, Moreno L, Tripole S, de Oliveira C, Natale GS. Effects of glyphosate on hepatic tissue evaluating melanomacrophages and erythrocytes responses in neotropical anuran Leptodactylus latinasus. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:9852-61. [PMID: 26856864 DOI: 10.1007/s11356-016-6153-z] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2015] [Accepted: 01/20/2016] [Indexed: 06/05/2023]
Abstract
Glyphosate (GLY) is the most used herbicide worldwide and its effects on anurans are well known. Pollutants can cause physiological and morphological effects. Therefore, this study evaluated the effects of GLY on hepatic melanomacrophages as a response to environmental stressors. Three treatments were exposed to different concentrations of pure GLY (100, 1000, and 10,000 μg g(-1), respectively), and there was also a control group. After the experimental time, liver and blood were analyzed. Melanomacrophages (MMCs) were located between the hepatocyte cordons, close to sinusoids. GLY increased the melanin area in MMCs of Leptodactylus latinasus exposed since lowest concentration until highest concentration. GLY also changed the occurrence of hepatic catabolism pigments into melanomacrophages and erythrocyte nuclear abnormalities; therefore, it can interfere with the hepatic metabolism. In conclusion, GLY promotes alterations in the hepatic tissue and erythrocyte nuclear abnormalities. Furthermore, MMCs may be useful as morphological responses of GLY effects.
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Affiliation(s)
- Juan Manuel Pérez-Iglesias
- PROICO 9401, Área Zoología, Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, Chacabuco 917, San Luis, 5700, Argentina
- Centro de Investigaciones del Medio Ambiente, Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, CONICET, La Plata, Argentina
| | - Lilian Franco-Belussi
- Department of Biology, São Paulo State University (UNESP), IBILCE, Rua Cristóvão Colombo, 2265, Jardim Nazareth, São José do Rio Preto, 15054-000, São Paulo, Brazil
| | - Liliana Moreno
- PROICO 9401, Área Zoología, Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, Chacabuco 917, San Luis, 5700, Argentina
| | - Susana Tripole
- PROICO 9401, Área Zoología, Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, Chacabuco 917, San Luis, 5700, Argentina
| | - Classius de Oliveira
- Department of Biology, São Paulo State University (UNESP), IBILCE, Rua Cristóvão Colombo, 2265, Jardim Nazareth, São José do Rio Preto, 15054-000, São Paulo, Brazil.
| | - Guillermo Sebastián Natale
- PROICO 9401, Área Zoología, Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, Chacabuco 917, San Luis, 5700, Argentina
- Centro de Investigaciones del Medio Ambiente, Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, CONICET, La Plata, Argentina
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Vasconcelos AM, Daam MA, dos Santos LRA, Sanches ALM, Araújo CVM, Espíndola ELG. Acute and chronic sensitivity, avoidance behavior and sensitive life stages of bullfrog tadpoles exposed to the biopesticide abamectin. ECOTOXICOLOGY (LONDON, ENGLAND) 2016; 25:500-509. [PMID: 26758616 DOI: 10.1007/s10646-015-1608-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 12/28/2015] [Indexed: 06/05/2023]
Abstract
As compared to other aquatic organism groups, relatively few studies have been conducted so far evaluating the toxicity of pesticides to amphibians. This may at least partly be due to the fact that regulations for registering pesticides usually do not require testing amphibians. The sensitivity of amphibians is generally considered to be covered by that based on toxicity tests with other aquatic organisms (e.g. fish) although the impact of a pesticide on amphibians may be very different. In the present study, acute and chronic laboratory tests were conducted to evaluate the acute and chronic toxicity of abamectin (as Vertimec(®) 18EC) to bullfrog (Lithobates catesbeianus) tadpoles. Acute tests were conducted at two tadpole stages (Gosner stage 21G and 25G) and avoidance tests were also conducted with stage Gosner stage 21G tadpoles. Calculated acute toxicity values were greater than those reported for standard fish test species, hence supporting the use of fish toxicity data as surrogates for amphibians in acute risk assessments. Given the limited number and extent of available amphibian toxicity studies, however, research needs to increase our understanding of pesticide toxicity to amphibians are discussed.
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Affiliation(s)
- Ana M Vasconcelos
- NEEA/CRHEA, São Carlos Engineering School, University of São Paulo, Av. Trabalhador São Carlense, 400, São Carlos, 13.560-970, Brazil
| | - Michiel A Daam
- NEEA/CRHEA, São Carlos Engineering School, University of São Paulo, Av. Trabalhador São Carlense, 400, São Carlos, 13.560-970, Brazil.
- CESAM and Department of Biology, University of Aveiro, Campus Universitário de Santiago, 3810-191, Aveiro, Portugal.
| | - Liliana R A dos Santos
- Instituto Superior de Agronomia, University of Lisbon, Tapada da Ajuda, 1349-017, Lisbon, Portugal
| | - Ana L M Sanches
- NEEA/CRHEA, São Carlos Engineering School, University of São Paulo, Av. Trabalhador São Carlense, 400, São Carlos, 13.560-970, Brazil
| | - Cristiano V M Araújo
- Central Department of Research (DCI), Ecuadorian Aquatic Ecotoxicology (ECUACTOX) Group, Universidad Laica Eloy Alfaro de Manabí (ULEAM), Manta, Ecuador
- Centre of Functional Ecology (CFE), Department of Life Sciences, University of Coimbra, Coimbra, Portugal
| | - Evaldo L G Espíndola
- NEEA/CRHEA, São Carlos Engineering School, University of São Paulo, Av. Trabalhador São Carlense, 400, São Carlos, 13.560-970, Brazil
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Wagner N, Lötters S, Veith M, Viertel B. Effects of an environmentally relevant temporal application scheme of low herbicide concentrations on larvae of two anuran species. CHEMOSPHERE 2015; 135:175-181. [PMID: 25950411 DOI: 10.1016/j.chemosphere.2015.04.028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/01/2015] [Revised: 04/08/2015] [Accepted: 04/09/2015] [Indexed: 06/04/2023]
Abstract
Cultivation of herbicide-tolerant crops involves repeated applications of the complementary herbicide throughout the growing season, while in conventional corn production, herbicide application is restricted to the beginning of cultivation. Repeated application of herbicides increases both the likelihood an organism will be exposed to the herbicide and the concentration it may be exposed to. We examined effects of short and pulsed exposure of the cycloxydim-based herbicide formulation Focus® Ultra at doses close to the calculated LC5 (0.01 and 0.5 mg a.i. L(-1)) and LC10 values (0.05 and 1.0 mg a.i. L(-1)) on early premetamorphic and prometamorphice larvae of two anuran model organisms, Xenopus laevis and Discoglossus scovazzi. In addition, larvae were repeatedly exposed, i.e. at all considered developmental stages. The herbicide did not induce effects on body size at and time to metamorphosis or increase deformation rates in both species. Exposure to calculated LC5 values did not increase mortality or cause clinical signs in both species. At calculated LC10 values, narcotic effects were seen in all developmental stages. There was no clear evidence of developmental-specific mortality. Metamorphic success was independent of time point and duration of application in X. laevis. Only repeated exposure significantly increased mortality at metamorphosis in D. scovazzi. Narcosis may result in increased mortality under field conditions due to rise of predation risk. Different sensitivity of the test species to the compound was attributed to their physiological properties. Different filtering rates were understood as an accompanying factor influencing exposition.
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Affiliation(s)
- Norman Wagner
- Trier University, Department of Biogeography, Universitätsring 15, 54296 Trier, Germany.
| | - Stefan Lötters
- Trier University, Department of Biogeography, Universitätsring 15, 54296 Trier, Germany
| | - Michael Veith
- Trier University, Department of Biogeography, Universitätsring 15, 54296 Trier, Germany
| | - Bruno Viertel
- Trier University, Department of Biogeography, Universitätsring 15, 54296 Trier, Germany
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