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Toledo FADO, Santos DOD, Vasconcelos IMA, Oliveira AR, Cabral JAG, Toledo RARD, Cunha PHH, Batista DFA, Paes Leme FDO, Carvalho MPND, da Paixão TA, Machado-Neves M, Melo MM, Santos RL. Heavy metals bioaccumulation in free-ranging South American rattlesnakes (Crotalus durissus) in Southeastern Brazil. Environ Sci Pollut Res Int 2024:10.1007/s11356-024-33432-5. [PMID: 38653891 DOI: 10.1007/s11356-024-33432-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Accepted: 04/18/2024] [Indexed: 04/25/2024]
Abstract
Anthropogenic activities are the main sources of soil, air, and water pollution by metals, including cadmium (Cd), lead (Pb), chromium (Cr), the metalloid arsenic (As), magnesium (Mg), zinc (Zn), and copper (Cu). The goal of this study was to assess the presence and concentration of toxic (As, Cd, Pb, and Cr) and essential metals (Mg, Zn, and Cu) in the liver and kidneys from 96 free-ranging rattlesnakes (Crotalus durissus) from Minas Gerais (Brazil). Bioaccumulation of Cd and Pb were significantly higher in males and heavier rattlesnakes (those with body weight above the average of the study population). Average ± standard deviations of Cd, Pb, Cr, Cu, Mg, Zn, and As in the general population (n = 96) were 3.19 ± 2.52; 5.98 ± 8.49; 0.66 ± 1.97; 3.27 ± 2.85; 776.14 ± 2982.92; 27.44 ± 29.55; and 0.32 ± 1.46; respectively. Bioaccumulation of some metals correlated positively with changes in hematologic and serum biochemical parameters. Results of this study were contrasted with previous studies assessing metal bioaccumulation in other species of terrestrial or aquatic snakes. Considering their position in the food chain and the broad range of bioaccumulation of both toxic and essential metals observed in this study, rattlesnakes may function as highly relevant biological sentinels for environmental pollution.
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Affiliation(s)
| | - Daniel Oliveira Dos Santos
- Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, 31270-901, Brazil
| | | | - Ayisa Rodrigues Oliveira
- Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, 31270-901, Brazil
| | | | | | - Pedro Hugo Henriques Cunha
- Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, 31270-901, Brazil
| | - Diego Felipe Alves Batista
- Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, 31270-901, Brazil
| | | | | | - Tatiane Alves da Paixão
- Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, 31270-901, Brazil
| | - Mariana Machado-Neves
- Departamento de Biologia Geral, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-900, Brazil
| | - Marilia Martins Melo
- Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, 31270-901, Brazil
| | - Renato Lima Santos
- Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, 31270-901, Brazil.
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Frossard A, Coppo GC, Lourenço AT, Heringer OA, Chippari-Gomes AR. Metal bioaccumulation and its genotoxic effects on eggs and hatchlings of giant Amazon river turtle (Podocnemis expansa). Ecotoxicology 2021; 30:643-657. [PMID: 33754232 DOI: 10.1007/s10646-021-02384-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 02/26/2021] [Indexed: 06/12/2023]
Abstract
The aim of this study was to assess whether possible metal contamination in the sediment of the nests of giant Amazon river turtle, Podocnemis expansa, could contaminate eggs and hatchlings, triggering genotoxic damage. Therefore, sediments of P. expansa nests from two sites in the Brazilian Amazon were evaluated, with the first being collected at Araguaia River and the second at Crixás-Açu River. Newly hatched offspring, eggs, and sediments were collected from the beaches of these two rivers and the quantification of metals (Al, Cd, Co, Cr, Cu, Fe, Mn, Pb, and Zn) was carried out by atomic absorption spectroscopy. All targeted metals were found in both sediment and P. expansa biological samples collected on the beaches presenting higher concentrations in the sediment of Crixás-Açu River. Metals found in the eggshells before nesting and in the egg contents were maternally transferred. Moreover, augmented concentration of metals led by metal transfer from the nests sediments were detected in the eggshells after nesting (ENH) and in the newly hatched offspring (H). Probably this metal relocation to the newly hatchlings augmented the frequency of micronuclei in their blood, presenting 15.25‰ in hatchling found in Crixás-Açu River beaches and 10‰ in newly hatched animals from Araguaia River beaches. These results indicate the occurrence of maternal transfer of metals (essential or not) to the eggs in testudines as well as a transference from the sediments to the nesting eggs, triggering genotoxic effects on the hatchlings.
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Affiliation(s)
- Alexandra Frossard
- Laboratory of Applied Ichthyology, Vila Velha University, Av. Comissário José Dantas de Melo, 21, Boa Vista, 29102-770, Vila Velha, ES, Brazil.
| | - Gabriel Carvalho Coppo
- Laboratory of Applied Ichthyology, Vila Velha University, Av. Comissário José Dantas de Melo, 21, Boa Vista, 29102-770, Vila Velha, ES, Brazil
| | - Amanda Toledo Lourenço
- Laboratory of Health and Wildlife, Vila Velha University, Av. Comissário José Dantas de Melo, 21, Boa Vista, 29102-770, Vila Velha, ES, Brazil
| | - Otávio Arruda Heringer
- Department of Research and Development -Tommasi Ambiental, Av. Arara Azul, 187, Novo Horizonte, Serra, ES, Brazil
| | - Adriana Regina Chippari-Gomes
- Laboratory of Applied Ichthyology, Vila Velha University, Av. Comissário José Dantas de Melo, 21, Boa Vista, 29102-770, Vila Velha, ES, Brazil
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Frossard A, Vieira LV, Carneiro MTWD, Gomes LC, Chippari-Gomes AR. Accumulation of trace metals in eggs and hatchlings of Chelonia mydas. J Trace Elem Med Biol 2020; 62:126654. [PMID: 33164783 DOI: 10.1016/j.jtemb.2020.126654] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Revised: 08/26/2020] [Accepted: 09/22/2020] [Indexed: 12/18/2022]
Abstract
BACKGROUND The objective of this study was to verify the accumulation of trace metals in eggs and hatchlings of Chelonia mydas, evaluating if metal accumulation is originated from maternal transfer and/or from the incubation environment. Other assessments were also performed, as metal distribution in different tissues (blood, kidney, liver, muscle, and turtle shells) of newly hatched turtles, and genotoxic analysis, to verify possible damages caused by the presence of metals. METHODS The assessments were carried out by quantifying Cd, Ni, Pb, Mn and Fe in egg sample collected during laying time (eggshells (ELT) and egg content (EC)), eggshells from newly hatched turtles (ENH), hatchlings tissues (H - blood, kidney, liver, muscle, and shell)) (n = 18 for each biological sample - 3 of each nest) and nest sediments (n = 6, one of each nest). Comparative analysis were made between ELT and ENH, as well as between egg content (EC) and the sum of tissue samples from hatchlings, using Mann-Whitney hypothesis test (p < 0,05). The amount of metals in different hatchling was quantified and followed by the Dunn post-test. A principal component analysis (PCA) was also employed. RESULTS Metals studied were found in all investigated samples. The concentration of a great amount of investigated metals was significantly higher (P=<0.001) in eggshells from ENH than in ELT. An increase in Cd (2.16-fold), Pb (3.47-fold), Fe (6.83-fold) and Mn (195.57-fold) concentration was noticed in ENH. We also observed an increase in Fe (1.59-fold), Mn (1.74-fold) and Ni (1.59-fold) concentration in hatchling, when compared with EC, due to transfer from nest sediments. In relation to the hatchling's tissues, blood was shown to accumulate higher concentrations of Ni and Pb, while shells accumulated more Cd and Fe, and Mn is more associated with liver and kidney. Fe was the highest accumulated metal in both tissues, and muscles presented discrete concentrations of Ni, Mn, and Pb. A mean concentration of 1.25‰ MN was obtained in C. mydas hatchlings, indicating that the accumulation of metals in hatchlings didn't cause toxicology effects. CONCLUSION Hatchlings accumulate metals through the maternal and sediment transfer, although the levels of metal accumulation were not enough to cause genotoxic damage.
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Affiliation(s)
- Alexandra Frossard
- Vila Velha University - UVV, Laboratory of Applied Ichthyology (LAB PEIXE), Comissário José Dantas de Melo, 21, Boa Vista, 29102-770, Vila Velha, ES, Brazil.
| | - Luiza Valli Vieira
- Federal University of Espírito Santo - UFES, Department of Chemistry, Fernando Ferrari, 514, Goiabeiras, 29075-910, Vitória, ES, Brazil
| | | | - Levy Carvalho Gomes
- Vila Velha University - UVV, Laboratory of Applied Ichthyology (LAB PEIXE), Comissário José Dantas de Melo, 21, Boa Vista, 29102-770, Vila Velha, ES, Brazil
| | - Adriana Regina Chippari-Gomes
- Vila Velha University - UVV, Laboratory of Applied Ichthyology (LAB PEIXE), Comissário José Dantas de Melo, 21, Boa Vista, 29102-770, Vila Velha, ES, Brazil
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