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Jung S, Besnard L, Li ML, R Reinfelder J, Kim E, Kwon SY, Kim JH. Interspecific Variations in the Internal Mercury Isotope Dynamics of Antarctic Penguins: Implications for Biomonitoring. Environ Sci Technol 2024; 58:6349-6358. [PMID: 38531013 DOI: 10.1021/acs.est.3c09452] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/28/2024]
Abstract
Mercury (Hg) biomonitoring requires a precise understanding of the internal processes contributing to disparities between the Hg sources in the environment and the Hg measured in the biota. In this study, we investigated the use of Hg stable isotopes to trace Hg accumulation in Adélie and emperor penguin chicks from four breeding colonies in Antarctica. Interspecific variation of Δ199Hg in penguin chicks reflects the distinct foraging habitats and Hg exposures in adults. Chicks at breeding sites where adult penguins predominantly consumed mesopelagic prey showed relatively lower Δ199Hg values than chicks that were primarily fed epipelagic krill. Substantial δ202Hg variations in chick tissues were observed in both species (Adélie: -0.11 to 1.13‰, emperor: -0.27 to 1.15‰), whereas only emperor penguins exhibited the lowest δ202Hg in the liver and the highest in the feathers. Our results indicate that tissue-specific δ202Hg variations and their positive correlations with % MeHg resulted from MeHg demethylation in the liver and kidneys of emperor penguin chicks, whereas Adélie penguin chicks showed different internal responses depending on their exposure to dietary MeHg. This study highlights the importance of considering intra- and interspecific variations in adult foraging ecology and MeHg demethylation when selecting penguin chicks for Hg biomonitoring.
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Affiliation(s)
- Saebom Jung
- Division of Environmental Science and Engineering, Pohang University of Science and Technology, 77 Cheongam-Ro, Nam-Gu, Pohang 37673, South Korea
| | - Lucien Besnard
- Division of Environmental Science and Engineering, Pohang University of Science and Technology, 77 Cheongam-Ro, Nam-Gu, Pohang 37673, South Korea
| | - Mi-Ling Li
- School of Marine Science and Policy, University of Delaware, Newark, Delaware 19716, United States
| | - John R Reinfelder
- Department of Environmental Sciences, Rutgers University, New Brunswick, New Jersey 08901, United States
| | - Eunhee Kim
- Citizens' Institute for Environmental Studies (CIES), Seoul 03039, South Korea
| | - Sae Yun Kwon
- Division of Environmental Science and Engineering, Pohang University of Science and Technology, 77 Cheongam-Ro, Nam-Gu, Pohang 37673, South Korea
- Institute for Convergence Research and Education in Advanced Technology, Yonsei University, 85 Songdogwahak-ro, Incheon 21983, South Korea
| | - Jeong-Hoon Kim
- Korea Polar Research Institute (KOPRI), 26 Songdomirae-ro, Incheon 21990, South Korea
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Sackett DK, Chrisp JK, Farmer TM. Isotopes and otolith chemistry provide insight into the biogeochemical history of mercury in southern flounder across a salinity gradient. Environ Sci Process Impacts 2024; 26:233-246. [PMID: 38284178 DOI: 10.1039/d3em00482a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2024]
Abstract
Methylmercury (MeHg) continues to pose a significant global health risk to wildlife and humans through fish consumption. Despite numerous advancements in understanding the mercury (Hg) cycle, questions remain about MeHg sources that accumulate in fish, particularly across transitional coastal areas, where harvest is prominent and Hg sources are numerous. Here we used a unique combination of Hg and nutrient isotopes, and otolith chemistry to trace the biogeochemical history of Hg and identify Hg sources that accumulated in an economically important fish species across Mobile Bay, Alabama (USA). Fish tissue Hg in our samples primarily originated from wet deposition within the watershed, and partly reflected legacy industrial Hg. Results also suggest that little Hg was lost through photochemical processes (<10% of fish tissue Hg underwent photochemical processes). Of the small amount that did occur, photodegradation of the organic form, MeHg, was not the dominant process. Biotic transformation processes were estimated to have been a primary driver of Hg fractionation (∼93%), with isotope results indicating methylation as the primary biotic fractionation process prior to Hg entering the foodweb. On a finer scale, individual lifetime estuarine habitat use influenced Hg sources that accumulated in fish and fish Hg concentrations, with runoff from terrestrial Hg sources having a larger influence on fish in freshwater regions of the estuary compared to estuarine regions. Overall, results suggest increases in Hg inputs to the Mobile Bay watershed from wet deposition, turnover of legacy sources, and runoff are likely to translate into increased uptake into the foodweb.
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Affiliation(s)
- Dana K Sackett
- Department of Environmental Science and Technology, University of Maryland, 8127 Regents Dr, College Park, MD 20742, USA.
| | - Jared K Chrisp
- Department of Forestry and Environmental Conservation, Clemson University, 262 Lehotsky Hall, Clemson, SC 29634, USA
| | - Troy M Farmer
- Department of Forestry and Environmental Conservation, Clemson University, 262 Lehotsky Hall, Clemson, SC 29634, USA
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Guo Z, Gong Y, Li Z, Shen Y, Li Y. Lipid-extracted muscle and liver tissues: Can they reveal mercury exposure of pelagic sharks? Chemosphere 2023; 340:139873. [PMID: 37619753 DOI: 10.1016/j.chemosphere.2023.139873] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2023] [Revised: 08/14/2023] [Accepted: 08/17/2023] [Indexed: 08/26/2023]
Abstract
Pelagic sharks are apex predators in oceanic ecosystems and tend to accumulate high amounts of mercury (Hg). The conventional method for assessing Hg exposure in sharks involves analyzing tissue samples without any chemical treatment. However, a substantial number of chemically treated tissue samples are still being preserved in laboratories or museums. It is critical to maximize the utilization of existing samples to reduce the need for additional sampling of pelagic sharks, especially endangered species. Lipid extraction is a widely employed pretreatment process for carbon isotope analysis in shark trophic ecology, while its impact on Hg quantification remains uncertain. Here, we evaluated the feasibility of using lipid-free muscle and liver tissues for investigation of Hg exposure in four endangered pelagic sharks inhabiting the eastern Pacific, including bigeye thresher (Alopias superciliosus), pelagic thresher (A. pelagicus), blue shark (Prionace glauca) and silky shark (Carcharhinus falciformis). Results showed that total Hg concentrations (THg) differed between untreated (THgbulk) and lipid-free (THglipid-free) samples for each tissue type of each species. In addition, dichloromethane-methanol extractions significantly altered the amount of Hg. This may result from the removal of lipoprotein compounds that vary between tissues and species. The THgbulk can be calculated by THglipid-free using the following formulas, THgbulk = 1.14 × THglipid-free + 0.30 and THgbulk = 0.33 × THglipid-free + 0.18, for muscle and liver tissues, respectively. These findings emphasize the applications of lipid-free tissues in THg analysis. This study may have important implications for improving evaluation of Hg exposure in endangered pelagic sharks.
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Affiliation(s)
- Zehao Guo
- College of Marine Sciences, Shanghai Ocean University, Shanghai, China
| | - Yi Gong
- College of Marine Sciences, Shanghai Ocean University, Shanghai, China; Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Ministry of Education, Shanghai, China; National Engineering Research Centre for Oceanic Fisheries, Shanghai Ocean University, Shanghai, China; Key Laboratory of Oceanic Fisheries Exploration, Ministry of Agriculture and Rural Affairs, Shanghai, China.
| | - Zezheng Li
- College of Marine Sciences, Shanghai Ocean University, Shanghai, China
| | - Yongfu Shen
- College of Marine Sciences, Shanghai Ocean University, Shanghai, China
| | - Yunkai Li
- College of Marine Sciences, Shanghai Ocean University, Shanghai, China; Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Ministry of Education, Shanghai, China; National Engineering Research Centre for Oceanic Fisheries, Shanghai Ocean University, Shanghai, China; Key Laboratory of Oceanic Fisheries Exploration, Ministry of Agriculture and Rural Affairs, Shanghai, China.
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Le Croizier G, Lorrain A, Hoyos-Padilla M, Ketchum JT, Amezcua-Martínez F, Le Loc'h F, Munaron JM, Schaal G, Point D. Do marine protected areas influence mercury exposure? Insights from a shark community in the tropical Northeast Pacific. Environ Pollut 2023; 336:122352. [PMID: 37562525 DOI: 10.1016/j.envpol.2023.122352] [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: 04/06/2023] [Revised: 07/12/2023] [Accepted: 08/08/2023] [Indexed: 08/12/2023]
Abstract
Biomass depletion caused by overfishing is likely to alter the structure of food webs and impact mercury transfer to marine predators. Although marine protected areas (MPAs) are spared from fishing pressure, their influence on biota mercury levels is poorly understood. Here, we used carbon and nitrogen stable isotope compositions as well as mercury concentrations in fin clips to characterize foraging habitat and mercury exposure of a shark community composed of migratory and resident species of the Revillagigedo archipelago, an offshore MPA in the Northeast Pacific off Mexico. We found that the probability of finding migratory sharks in the isotopic niche of Revillagigedo-resident sharks was low, likely reflecting the use of habitats outside the archipelago by highly mobile species. Community-wide variations in mercury were primarily explained by shark length, revealing that bioaccumulation was the main driver of Hg concentrations. We failed to detect a clear effect of foraging habitat on shark mercury exposure, which may be related to migratory species using both exploited and protected areas when moving outside the Revillagigedo MPA. More similar studies on the potential mitigation of Hg contamination by MPAs are needed in the future if fishing pressure increases to satisfy the growing global human population.
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Affiliation(s)
- Gaël Le Croizier
- Instituto de Ciencias Del Mar y Limnología, Universidad Nacional Autónoma de México, Av. Joel Montes Camarena S/N, Mazatlán, Sin, 82040, Mexico.
| | - Anne Lorrain
- Univ Brest, CNRS, IRD, Ifremer, LEMAR, F-29280, Plouzané, France
| | - Mauricio Hoyos-Padilla
- Pelagios-Kakunjá A.C, Sinaloa 1540, Col. Las Garzas, C.P. 23070, La Paz, B.C.S., Mexico; Fins Attached: Marine Research and Conservation, 19675 Still Glen Drive, Colorado Springs, CO 80908, USA
| | - James T Ketchum
- Pelagios-Kakunjá A.C, Sinaloa 1540, Col. Las Garzas, C.P. 23070, La Paz, B.C.S., Mexico; MigraMar, Bodega Bay, CA, USA; Centro de Investigaciones Biológicas Noroeste (CIBNOR), La Paz, B.C.S., Mexico
| | - Felipe Amezcua-Martínez
- Instituto de Ciencias Del Mar y Limnología, Universidad Nacional Autónoma de México, Av. Joel Montes Camarena S/N, Mazatlán, Sin, 82040, Mexico
| | | | | | - Gauthier Schaal
- Univ Brest, CNRS, IRD, Ifremer, LEMAR, F-29280, Plouzané, France
| | - David Point
- UMR Géosciences Environnement Toulouse (GET), Observatoire Midi Pyrénées (OMP), 14 Avenue Edouard Belin, 31400, Toulouse, France
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Chan KH, Gowidjaja JAP, Urera MQ, Wainwright BJ. Analysis of Toxic Metals Found in Shark Fins Collected from a Global Trade Hub. Environ Sci Technol 2023; 57:12620-12631. [PMID: 37582282 DOI: 10.1021/acs.est.3c02585] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/17/2023]
Abstract
As human activities release increasingly more fossil fuel-derived emissions directly into the atmosphere, terrestrial, aquatic, or marine ecosystems, the biomagnification and bioaccumulation of toxic metals in seafood is an ever more pressing concern. As apex predators, sharks are particularly susceptible to biomagnification and bioaccumulation. The consumption of shark fin is frequent throughout Asia, and their ingestion represents a pathway through which human exposure to potentially unsafe levels of toxic metals can occur. Shark fins processed for sale are difficult, if not impossible to identify to the species level by visual methods alone. Here, we DNA-barcoded 208 dried and processed fins and in doing so, identified fourteen species of shark. Using these identifications, we determined the habitat of the shark that the fin came from and the concentrations of four toxic metals (mercury, arsenic, cadmium, and lead) in all 208 samples via inductively coupled plasma mass spectrometry. We further analyzed these concentrations by habitat type, either coastal or pelagic, and show that toxic metal concentrations vary significantly between species and habitat. Pelagic species have significantly higher concentrations of mercury in comparison to coastal species, whereas coastal species have significantly higher concentrations of arsenic. No significant differences in cadmium or lead concentrations were detected between pelagic or coastal species. Our results indicate that a number of analyzed samples contain toxic metal concentrations above safe human consumption levels.
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Affiliation(s)
- Kiat Hwa Chan
- Yale-NUS College, National University of Singapore, 16 College Avenue West, Singapore 138527, Singapore
- NUS College, National University of Singapore, 18 College Avenue East, Singapore 138593, Singapore
| | | | - Mariana Quesada Urera
- Yale-NUS College, National University of Singapore, 16 College Avenue West, Singapore 138527, Singapore
| | - Benjamin J Wainwright
- Yale-NUS College, National University of Singapore, 16 College Avenue West, Singapore 138527, Singapore
- Department of Biological Sciences, National University of Singapore, 16 Science Drive 4, Singapore 117558, Singapore
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Zhou Z, Wang H, Li Y. Mercury stable isotopes in the ocean: Analytical methods, cycling, and application as tracers. Sci Total Environ 2023; 874:162485. [PMID: 36858226 DOI: 10.1016/j.scitotenv.2023.162485] [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: 11/03/2022] [Revised: 02/22/2023] [Accepted: 02/22/2023] [Indexed: 06/18/2023]
Abstract
Mercury (Hg) has seven stable isotopes that can be utilized to trace the sources of Hg and evaluate the importance of transport and transformation processes in the cycling of Hg in the environment. The ocean is an integral part of the Earth and plays an important role in the global mercury cycle. However, there is a lack of a systematic review of Hg stable isotopes in marine environments. This review is divided into four sections: a) advances in Hg stable isotope analysis, b) the isotope ratios of Hg in various marine environmental matrices (seawater, sediment, and organisms), c) processes governing stable Hg isotope ratios in the ocean, and d) application of Hg stable isotopes to understand biotic uptake and migration. Mercury isotopes have provided much useful information on marine Hg cycling that cannot be given by Hg concentrations alone. This includes (i) sources of Hg in coastal or estuarine environments, (ii) transformation pathways and mechanisms of different forms of Hg in marine environments, (iii) trophic levels and feeding guilds of marine fish, and (iv) migration/habitat changes of marine fish. With the improvement of methods for seawater Hg isotope analysis (especially species-specific methods) and the measurement of Hg isotope fractionation during natural biogeochemical processes in the ocean, Hg stable isotopes will advance our understanding of the marine Hg cycle in the future, e.g., mercury exchange at the sea-atmosphere interface and seawater-sediment interface, contributions of different water masses to Hg in the ocean, fractionation mechanisms of Hg and MeHg transformation in seawater.
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Affiliation(s)
- Zhengwen Zhou
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education and College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
| | - Huiling Wang
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education and College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
| | - Yanbin Li
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education and College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China.
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7
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Condini MV, Malinowski CR, Hoeinghaus DJ, Harried BL, Roberts AP, Soulen BK, Roark KJ, Khursigara AJ, Fischer LG, Possamai B, Hostim-Silva M, Garcia AM. Spatial analysis of mercury and stable isotopes in the vulnerable Dusky Grouper Epinephelus marginatus along the Brazilian coast. Mar Pollut Bull 2023; 187:114526. [PMID: 36621302 DOI: 10.1016/j.marpolbul.2022.114526] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2022] [Revised: 11/27/2022] [Accepted: 12/20/2022] [Indexed: 06/17/2023]
Abstract
Mercury (Hg) is a contaminant of global concern due to its damaging toxicological effects on organisms. For the vulnerable Dusky Grouper (Epinephelus marginatus) off the coast of Brazil, we investigated: i) spatial patterns in muscle tissue total mercury (THg) contamination; ii) the relationship between muscle THg concentrations and total length iii) the relationship between muscle THg and stable isotopes; and iv) THg concentrations among muscle, liver, and ovary tissues. Out of 134 fish sampled, 21.8 % were higher than 0.5 mg/kg wet weight (above the safe limit for human consumption). THg concentrations increased toward lower latitudes, but an opposite pattern was observed for δ13C and δ15N with decreased values toward lower latitudes. There were significant differences in THg concentration among the three tissues. Results of Hg concentrations are useful for understanding the potential adverse effects on the health of this vulnerable species and to serve as a guide to human consumers.
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Affiliation(s)
- Mario V Condini
- Laboratório de Ecologia de Peixes Marinhos-LEPMAR, Departamento de Ciências Agrárias e Biológicas, Universidade Federal do Espírito Santo, BR-101, km 60 Litorâneo, CEP: 29932-540 São Mateus, ES, Brazil; Programa de Pós-Graduação em Oceanografia Ambiental (PPGOAM), Universidade Federal do Espírito Santo, Av. Fernando Ferrari, 514, Goiabeiras, CEP: 29055-460 Vitória, ES, Brazil.
| | - Christopher R Malinowski
- Department of Forestry and Natural Resources, Purdue University, West Lafayette, IN 47907, USA; Ocean First Institute, 51 Shoreland Drive, Key Largo, FL 33037, USA
| | - David J Hoeinghaus
- Department of Biological Sciences and the Advanced Environmental Research Institute, University of North Texas, 1155 Union Circle #310559, Denton, TX, 76203-5017, USA
| | - Brittany L Harried
- Missouri Cooperative Fish and Wildlife Research Unit, School of Natural Resources, University of Missouri, 1111 E Rollins St., 302 ABNR, Columbia, MO 65211, USA
| | - Aaron P Roberts
- Department of Biological Sciences and the Advanced Environmental Research Institute, University of North Texas, 1155 Union Circle #310559, Denton, TX, 76203-5017, USA
| | - Brianne K Soulen
- Department of Biological Sciences and the Advanced Environmental Research Institute, University of North Texas, 1155 Union Circle #310559, Denton, TX, 76203-5017, USA
| | - Kathleen J Roark
- Department of Biological Sciences and the Advanced Environmental Research Institute, University of North Texas, 1155 Union Circle #310559, Denton, TX, 76203-5017, USA
| | - Alexis J Khursigara
- Department of Biological Sciences and the Advanced Environmental Research Institute, University of North Texas, 1155 Union Circle #310559, Denton, TX, 76203-5017, USA
| | - Luciano G Fischer
- Instituto de Biodiversidade e Sustentabilidade (NUPEM), Universidade Federal do Rio de Janeiro, Av. São José do Barreto 764, 27965-045 Macaé, RJ, Brazil
| | - Bianca Possamai
- Rubenstein Ecosystem Science Laboratory, University of Vermont, 3 College St., Burlington, VT 05401, USA
| | - Maurício Hostim-Silva
- Laboratório de Ecologia de Peixes Marinhos-LEPMAR, Departamento de Ciências Agrárias e Biológicas, Universidade Federal do Espírito Santo, BR-101, km 60 Litorâneo, CEP: 29932-540 São Mateus, ES, Brazil; Programa de Pós-Graduação em Oceanografia Ambiental (PPGOAM), Universidade Federal do Espírito Santo, Av. Fernando Ferrari, 514, Goiabeiras, CEP: 29055-460 Vitória, ES, Brazil
| | - Alexandre M Garcia
- Laboratório de Ictiologia, Instituto de Oceanografia, Universidade Federal do Rio Grande, Av. Itália Km 8, Carreiros, 96.201-900, Rio Grande, RS, Brazil
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Xavier JC, Golikov AV, Queirós JP, Perales-Raya C, Rosas-Luis R, Abreu J, Bello G, Bustamante P, Capaz JC, Dimkovikj VH, González AF, Guímaro H, Guerra-Marrero A, Gomes-Pereira JN, Hernández-Urcera J, Kubodera T, Laptikhovsky V, Lefkaditou E, Lishchenko F, Luna A, Liu B, Pierce GJ, Pissarra V, Reveillac E, Romanov EV, Rosa R, Roscian M, Rose-Mann L, Rouget I, Sánchez P, Sánchez-Márquez A, Seixas S, Souquet L, Varela J, Vidal EAG, Cherel Y. The significance of cephalopod beaks as a research tool: An update. Front Physiol 2022; 13:1038064. [PMID: 36467695 PMCID: PMC9716703 DOI: 10.3389/fphys.2022.1038064] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Accepted: 10/25/2022] [Indexed: 11/17/2022] Open
Abstract
The use of cephalopod beaks in ecological and population dynamics studies has allowed major advances of our knowledge on the role of cephalopods in marine ecosystems in the last 60 years. Since the 1960's, with the pioneering research by Malcolm Clarke and colleagues, cephalopod beaks (also named jaws or mandibles) have been described to species level and their measurements have been shown to be related to cephalopod body size and mass, which permitted important information to be obtained on numerous biological and ecological aspects of cephalopods in marine ecosystems. In the last decade, a range of new techniques has been applied to cephalopod beaks, permitting new kinds of insight into cephalopod biology and ecology. The workshop on cephalopod beaks of the Cephalopod International Advisory Council Conference (Sesimbra, Portugal) in 2022 aimed to review the most recent scientific developments in this field and to identify future challenges, particularly in relation to taxonomy, age, growth, chemical composition (i.e., DNA, proteomics, stable isotopes, trace elements) and physical (i.e., structural) analyses. In terms of taxonomy, new techniques (e.g., 3D geometric morphometrics) for identifying cephalopods from their beaks are being developed with promising results, although the need for experts and reference collections of cephalopod beaks will continue. The use of beak microstructure for age and growth studies has been validated. Stable isotope analyses on beaks have proven to be an excellent technique to get valuable information on the ecology of cephalopods (namely habitat and trophic position). Trace element analyses is also possible using beaks, where concentrations are significantly lower than in other tissues (e.g., muscle, digestive gland, gills). Extracting DNA from beaks was only possible in one study so far. Protein analyses can also be made using cephalopod beaks. Future challenges in research using cephalopod beaks are also discussed.
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Affiliation(s)
- José C. Xavier
- Department of Life Sciences, Marine and Environmental Sciences Centre/ ARNET–Aquatic Research Network, University of Coimbra, Coimbra, Portugal
- British Antarctic Survey, Natural Environment Research Council, Cambridge, United Kingdom
| | | | - José P. Queirós
- Department of Life Sciences, Marine and Environmental Sciences Centre/ ARNET–Aquatic Research Network, University of Coimbra, Coimbra, Portugal
- British Antarctic Survey, Natural Environment Research Council, Cambridge, United Kingdom
| | | | | | - José Abreu
- Department of Life Sciences, Marine and Environmental Sciences Centre/ ARNET–Aquatic Research Network, University of Coimbra, Coimbra, Portugal
- British Antarctic Survey, Natural Environment Research Council, Cambridge, United Kingdom
| | | | - Paco Bustamante
- Littoral Environnement et Sociétés (LIENSs), UMR 7266 CNRS-La Rochelle Université, La Rochelle, France
- Institut Universitaire de France (IUF), Paris, France
| | - Juan C. Capaz
- Center of Marine Sciences, University of Algarve, Campus de Gambelas, Faro, Portugal
| | - Valerie H. Dimkovikj
- Department of Marine Science, Coastal Carolina University, Conway, SC, United States
| | | | - Hugo Guímaro
- Department of Life Sciences, Marine and Environmental Sciences Centre/ ARNET–Aquatic Research Network, University of Coimbra, Coimbra, Portugal
- British Antarctic Survey, Natural Environment Research Council, Cambridge, United Kingdom
| | - Airam Guerra-Marrero
- IU-ECOAQUA, University of Las Palmas de Gran Canaria, Edf. Ciencias Básicas, Campus de Tafira, Las Palmas de Gran Canaria, Spain
| | | | | | | | - Vladimir Laptikhovsky
- Centre for Environment, Fisheries and Aquaculture Science (CEFAS), Lowestoft, United Kingdom
| | | | - Fedor Lishchenko
- Laboratory for Ecology and Morphology of Marine Invertebrates, A.N. Severtsov Institute of Ecology and Evolution of the Russian Academy of Sciences, Moscow, Russia
| | - Amanda Luna
- Department of Ecology and Animal Biology, Faculty of Marine Sciences, University of Vigo, Vigo, Spain
| | - Bilin Liu
- College of Marine Sciences, Shanghai Ocean University, Shanghai, China
| | | | - Vasco Pissarra
- MARE—Marine and Environmental Sciences Centre/ARNET–Aquatic Research Network, Laboratório Marítimo da Guia, Faculdade de Ciências, Universidade de Lisboa, Cascais, Portugal
| | - Elodie Reveillac
- Littoral Environnement et Sociétés (LIENSs), UMR 7266 CNRS-La Rochelle Université, La Rochelle, France
| | - Evgeny V. Romanov
- Centre Technique de Recherche et de Valorisation des Milieux Aquatiques (CITEB), Le Port, Île de la Réunion, France
| | - Rui Rosa
- MARE—Marine and Environmental Sciences Centre/ARNET–Aquatic Research Network, Laboratório Marítimo da Guia, Faculdade de Ciências, Universidade de Lisboa, Cascais, Portugal
| | - Marjorie Roscian
- Centre de Recherche en Paléontologie-Paris (CR2P), CNRS, Sorbonne Université, Paris, France
| | - Lisa Rose-Mann
- University of South Florida, College of Marine Science, St. Petersburg, FL, United States
| | - Isabelle Rouget
- Centre de Recherche en Paléontologie-Paris (CR2P), CNRS, Sorbonne Université, Paris, France
| | - Pilar Sánchez
- Institut de Ciènces del Mar, CSIC, Psg. Marítim de la Barceloneta, Barcelona, Spain
| | | | - Sónia Seixas
- Department of Life Sciences, Marine and Environmental Sciences Centre/ ARNET–Aquatic Research Network, University of Coimbra, Coimbra, Portugal
- Universidade Aberta, Rua Escola Politécnica, Lisboa, Portugal
| | - Louise Souquet
- Department of Mechanical Engineering, Faculty of Engineering Science, University College London, London, United Kingdom
| | - Jaquelino Varela
- MARE—Marine and Environmental Sciences Centre/ARNET–Aquatic Research Network, Laboratório Marítimo da Guia, Faculdade de Ciências, Universidade de Lisboa, Cascais, Portugal
| | - Erica A. G. Vidal
- Center for Marine Studies—Federal University of Parana (UFPR), Pontal do Paraná, PR, Brazil
| | - Yves Cherel
- Centre d’Etudes Biologiques de Chizé, UMR 7372 du CNRS-La Rochelle Université, Villiers-en-Bois, France
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Muñoz-Abril L, Valle CA, Alava JJ, Janssen SE, Sunderland EM, Rubianes-Landázuri F, Emslie SD. Elevated Mercury Concentrations and Isotope Signatures (N, C, Hg) in Yellowfin Tuna (Thunnus albacares) from the Galápagos Marine Reserve and Waters off Ecuador. Environ Toxicol Chem 2022; 41:2732-2744. [PMID: 35975428 DOI: 10.1002/etc.5458] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Revised: 04/19/2022] [Accepted: 08/02/2022] [Indexed: 06/15/2023]
Abstract
We examined how dietary factors recorded by C and N influence Hg uptake in 347 individuals of yellowfin tuna (Thunnus albacares), an important subsistence resource from the Galápagos Marine Reserve (Ecuador) and the Ecuadorian mainland coast in 2015-2016. We found no differences in total Hg (THg) measured in red muscle between the two regions and no seasonal differences, likely due to the age of the fish and slow elimination rates of Hg. Our THg concentrations are comparable to those of other studies in the Pacific (0.20-9.60 mg/kg wet wt), but a subset of individuals exhibited the highest Hg concentrations yet reported in yellowfin tuna. Mercury isotope values differed between Δ199 Hg and δ202Hg in both regions (Δ199 Hg = 2.86 ± 0.04‰ vs. Δ199 Hg = 2.33 ± 0.07‰), likely related to shifting food webs and differing photochemical processing of Hg prior to entry into the food web. There were significantly lower values of both δ15 N and δ13 C in tuna from Galápagos Marine Reserve (δ15 N: 8.5-14.2‰, δ13 C: -18.5 to -16.1‰) compared with those from the Ecuadorian mainland coast (δ15 N: 8.3-14.4‰, δ13 C: -19.4 to -11.9‰), of which δ13 C values suggest spatially constrained movements of tuna. Results from the pooled analysis, without considering region, indicated that variations in δ13 C and δ15 N values tracked changes of Hg stable isotopes. Our data indicate that the individual tuna we used were resident fish of each region and were heavily influenced by upwellings related to the eastern Pacific oxygen minimum zone and the Humboldt Current System. The isotopes C, N, and Hg reflect foraging behavior mainly on epipelagic prey in shallow waters and that food web shifts drive Hg variations between these populations of tuna. Environ Toxicol Chem 2022;41:2732-2744. © 2022 SETAC.
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Affiliation(s)
- Laia Muñoz-Abril
- Colegio de Ciencias Biológicas y Ambientales, Universidad San Francisco de Quito, Quito, Ecuador
- Galápagos Science Center, Puerto Baquerizo Moreno, Ecuador
- Department of Marine Sciences, University of South Alabama, Mobile, Alabama, USA
| | - Carlos A Valle
- Colegio de Ciencias Biológicas y Ambientales, Universidad San Francisco de Quito, Quito, Ecuador
- Galápagos Science Center, Puerto Baquerizo Moreno, Ecuador
| | - Juan José Alava
- Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, British Columbia, Canada
| | - Sarah E Janssen
- Upper Midwest Water Science Center, US Geological Survey, Middleton, Wisconsin, USA
| | - Elsie M Sunderland
- Harvard T.H. Chan School of Public Health, Harvard University, Cambridge, Massachusetts, USA
| | - Francisco Rubianes-Landázuri
- Colegio de Ciencias Biológicas y Ambientales, Universidad San Francisco de Quito, Quito, Ecuador
- Galápagos Science Center, Puerto Baquerizo Moreno, Ecuador
| | - Steven D Emslie
- Department of Biology and Marine Biology, University of North Carolina, Wilmington, North Carolina, USA
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Pantoja-Echevarría LM, Marmolejo-Rodríguez AJ, Galván-Magaña F, Elorriaga-Verplancken FR, Tripp-Valdéz A, Tamburin E, Lara A, Jonathan M, Sujitha S, Delgado-Huertas A, Arreola-Mendoza L. Trophic structure and biomagnification of cadmium, mercury and selenium in brown smooth hound shark (Mustelus henlei) within a trophic web. Food Webs 2022. [DOI: 10.1016/j.fooweb.2022.e00263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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11
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Cybulski JD, Skinner C, Wan Z, Wong CKM, Toonen RJ, Gaither MR, Soong K, Wyatt ASJ, Baker DM. Improving stable isotope assessments of inter- and intra-species variation in coral reef fish trophic strategies. Ecol Evol 2022; 12:e9221. [PMID: 36172294 PMCID: PMC9468908 DOI: 10.1002/ece3.9221] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Revised: 07/03/2022] [Accepted: 07/22/2022] [Indexed: 11/23/2022] Open
Abstract
Fish have one of the highest occurrences of individual specialization in trophic strategies among Eukaryotes. Yet, few studies characterize this variation during trophic niche analysis, limiting our understanding of aquatic food web dynamics. Stable isotope analysis (SIA) with advanced Bayesian statistics is one way to incorporate this individual trophic variation when quantifying niche size. However, studies using SIA to investigate trophodynamics have mostly focused on species‐ or guild‐level (i.e., assumed similar trophic strategy) analyses in settings where source isotopes are well‐resolved. These parameters are uncommon in an ecological context. Here, we use Stable Isotope Bayesian Ellipses in R (SIBER) to investigate cross‐guild trophodynamics of 11 reef fish species within an oceanic atoll. We compared two‐ (δ15N and δ13C) versus three‐dimensional (δ15N, δ13C, and δ34S) reconstructions of isotopic niche space for interpreting guild‐, species‐, and individual‐level trophic strategies. Reef fish isotope compositions varied significantly among, but also within, guilds. Individuals of the same species did not cluster together based on their isotope values, suggesting within‐species specializations. Furthermore, while two‐dimensional isotopic niches helped differentiate reef fish resource use, niche overlap among species was exceptionally high. The addition of δ34S and the generation of three‐dimensional isotopic niches were needed to further characterize their isotopic niches and better evaluate potential trophic strategies. These data suggest that δ34S may reveal fluctuations in resource availability, which are not detectable using only δ15N and δ13C. We recommend that researchers include δ34S in future aquatic food web studies.
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Affiliation(s)
- Jonathan D Cybulski
- The Swire Institute of Marine Science The University of Hong Kong Shek O Hong Kong SAR.,School of Biological Sciences The University of Hong Kong Pok Fu Lam Hong Kong SAR
| | - Christina Skinner
- Department of Ocean Science The Hong Kong University of Science and Technology Clear Water Bay Hong Kong SAR
| | - Zhongyue Wan
- School of Biological Sciences The University of Hong Kong Pok Fu Lam Hong Kong SAR
| | - Carmen K M Wong
- State Key Laboratory of Marine Pollution City University of Hong Kong Kowloon Hong Kong SAR
| | - Robert J Toonen
- Hawai'i Institute of Marine Biology, School of Ocean & Earth Sciences & Technology University of Hawai'i at Mānoa Kaneohe Hawaii USA
| | | | - Keryea Soong
- Department of Oceanography National Sun Yat-sen University Kaohsiung Taiwan
| | - Alex S J Wyatt
- Department of Ocean Science The Hong Kong University of Science and Technology Clear Water Bay Hong Kong SAR
| | - David M Baker
- The Swire Institute of Marine Science The University of Hong Kong Shek O Hong Kong SAR.,School of Biological Sciences The University of Hong Kong Pok Fu Lam Hong Kong SAR
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12
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Le Croizier G, Sonke JE, Lorrain A, Renedo M, Hoyos-Padilla M, Santana-Morales O, Meyer L, Huveneers C, Butcher P, Amezcua-Martinez F, Point D. Foraging plasticity diversifies mercury exposure sources and bioaccumulation patterns in the world's largest predatory fish. J Hazard Mater 2022; 425:127956. [PMID: 34986563 DOI: 10.1016/j.jhazmat.2021.127956] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 11/16/2021] [Accepted: 11/28/2021] [Indexed: 05/04/2023]
Abstract
Large marine predators exhibit high concentrations of mercury (Hg) as neurotoxic methylmercury, and the potential impacts of global change on Hg contamination in these species remain highly debated. Current contaminant model predictions do not account for intraspecific variability in Hg exposure and may fail to reflect the diversity of future Hg levels among conspecific populations or individuals, especially for top predators displaying a wide range of ecological traits. Here, we used Hg isotopic compositions to show that Hg exposure sources varied significantly between and within three populations of white sharks (Carcharodon carcharias) with contrasting ecology: the north-eastern Pacific, eastern Australasian, and south-western Australasian populations. Through Δ200Hg signatures in shark tissues, we found that atmospheric Hg deposition pathways to the marine environment differed between coastal and offshore habitats. Discrepancies in δ202Hg and Δ199Hg signatures among white sharks provided evidence for intraspecific exposure to distinct sources of marine methylmercury, attributed to population and ontogenetic shifts in foraging habitat and prey composition. We finally observed a strong divergence in Hg accumulation rates between populations, leading to three times higher Hg concentrations in large Australasian sharks compared to north-eastern Pacific sharks, and likely due to different trophic strategies adopted by adult sharks across populations. This study illustrates the variety of Hg exposure sources and bioaccumulation patterns that can be found within a single species and suggests that intraspecific variability needs to be considered when assessing future trajectories of Hg levels in marine predators.
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Affiliation(s)
- Gaël Le Croizier
- UMR Géosciences Environnement Toulouse (GET), Observatoire Midi Pyrénées (OMP), 14 avenue Edouard Belin, 31400 Toulouse, France; Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Av. Joel Montes Camarena S/N, Mazatlán, Sin 82040, Mexico.
| | - Jeroen E Sonke
- UMR Géosciences Environnement Toulouse (GET), Observatoire Midi Pyrénées (OMP), 14 avenue Edouard Belin, 31400 Toulouse, France
| | - Anne Lorrain
- Univ Brest, CNRS, IRD, Ifremer, LEMAR, F-29280 Plouzané, France
| | - Marina Renedo
- UMR Géosciences Environnement Toulouse (GET), Observatoire Midi Pyrénées (OMP), 14 avenue Edouard Belin, 31400 Toulouse, France
| | - Mauricio Hoyos-Padilla
- Pelagios-Kakunjá A.C, Sinaloa 1540, Col. Las Garzas, C.P. 23070 La Paz, B.C.S., Mexico; Fins Attached: Marine Research and Conservation, 19675 Still Glen Drive, Colorado Springs, CO 80908, USA
| | | | - Lauren Meyer
- Southern Shark Ecology Group, College of Science and Engineering, Flinders University, Adelaide, SA 5042, Australia; Georgia Aquarium, Atlanta, GA 30313, USA
| | - Charlie Huveneers
- Southern Shark Ecology Group, College of Science and Engineering, Flinders University, Adelaide, SA 5042, Australia
| | - Paul Butcher
- NSW Department of Primary Industries, National Marine Science Centre, Coffs Harbour, NSW 2450, Australia
| | - Felipe Amezcua-Martinez
- Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Av. Joel Montes Camarena S/N, Mazatlán, Sin 82040, Mexico
| | - David Point
- UMR Géosciences Environnement Toulouse (GET), Observatoire Midi Pyrénées (OMP), 14 avenue Edouard Belin, 31400 Toulouse, France
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