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Boldrocchi G, Monticelli D, Bettinetti R. To what extent are filter feeder elasmobranchs exposed to marine pollution? A systematic review. Environ Pollut 2023; 318:120881. [PMID: 36528198 DOI: 10.1016/j.envpol.2022.120881] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [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: 09/09/2022] [Revised: 12/12/2022] [Accepted: 12/13/2022] [Indexed: 06/17/2023]
Abstract
Filter feeding elasmobranchs may be considered as biological indicators of marine pollution, despite most of these species are under some degree of extinction risk. Among threats to this taxonomic group, marine pollution might represent an additional concern for their survival. In this review, a comprehensive systematic search of scientific literature on pollutants in filter feeding elasmobranchs was conducted to evaluate the bioaccumulation patterns, and risk for human consumers. We found that, despite an increasing trend in the number of published studies, the geographical coverage is still very limited and most of the studies focused solely on trace elements (70.8%). Among sharks, Rhincodon typus was the most represented species (66.7%), while Mobula mobular the most studied ray species (41.7%). Comparing the levels of pollutants in filter feeders between ocean basins, this review highlighted that Hg, As and Cd levels are mostly higher in those areas affected by both strong natural and anthropogenic source of emissions, such as the Indian Ocean. With regards to OCs, ΣPCB levels in muscle of C. maximus were between 4.3 and 50.5 μg kg-1 ww, highlighting a persistent contamination of PCB in the Mediterranean Sea. Some species exceeded the maximum allowable limits for foodstuff consumption for As, Cd and Pb. A total of 77.8% of the analyzed species exceeded the Environmental Quality Standards for Hg, while they were always below the EQSbiota for HCB, PBDEs, PFOS and DDT. Given their feeding mechanism that continuously samples the marine environment, further investigations are urgently needed to determine not only the extent of contaminant exposure in different hotspot locations but also the risks posed to the elasmobranch health.
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Affiliation(s)
- G Boldrocchi
- Department of Human Sciences, Innovation and Territory, University of Insubria, Via Valleggio 11, Como, Italy.
| | - D Monticelli
- Department of Science and High Technology, University of Insubria, Via Valleggio 11, Como, Italy
| | - R Bettinetti
- Department of Human Sciences, Innovation and Territory, University of Insubria, Via Valleggio 11, Como, Italy
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Chouvelon T, Gilbert L, Caurant F, Méndez‐Fernandez P, Bustamante P, Brault‐Favrou M, Spitz J. Nutritional grouping of marine forage species reveals contrasted exposure of high trophic levels to essential micro‐nutrients. OIKOS 2022. [DOI: 10.1111/oik.08844] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tiphaine Chouvelon
- Observatoire Pelagis, UAR 3462 La Rochelle Univ./CNRS La Rochelle France
- Ifremer, Unité Contamination Chimique des Écosystèmes Marins (CCEM) Nantes Cedex France
| | - Lola Gilbert
- Observatoire Pelagis, UAR 3462 La Rochelle Univ./CNRS La Rochelle France
- Centre d'Etudes Biologiques de Chizé (CEBC), UMR 7372 La Rochelle Univ./CNRS Villiers‐en‐Bois France
| | - Florence Caurant
- Observatoire Pelagis, UAR 3462 La Rochelle Univ./CNRS La Rochelle France
- Centre d'Etudes Biologiques de Chizé (CEBC), UMR 7372 La Rochelle Univ./CNRS Villiers‐en‐Bois France
| | | | - Paco Bustamante
- Littoral Environnement et Sociétés (LIENSs), UMR 7266 La Rochelle Univ./CNRS La Rochelle France
- Inst. Univ. de France (IUF) Paris France
| | - Maud Brault‐Favrou
- Littoral Environnement et Sociétés (LIENSs), UMR 7266 La Rochelle Univ./CNRS La Rochelle France
| | - Jérôme Spitz
- Observatoire Pelagis, UAR 3462 La Rochelle Univ./CNRS La Rochelle France
- Centre d'Etudes Biologiques de Chizé (CEBC), UMR 7372 La Rochelle Univ./CNRS Villiers‐en‐Bois France
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3
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Chouvelon T, Munschy C, Bruzac S, Caurant F, Churlaud C, Crochet S, Guillou G, Mauffret A, Méndez-Fernandez P, Niol J, Sireau T, Steinberg C, Wessel N, Spitz J. High inter-species variability in elemental composition of the twilight zone fauna varies implications for predators and exploitation by humans. Environ Res 2022; 204:112379. [PMID: 34780788 DOI: 10.1016/j.envres.2021.112379] [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: 08/02/2021] [Revised: 11/09/2021] [Accepted: 11/10/2021] [Indexed: 06/13/2023]
Abstract
While the importance of oceanic micronektonic species in biogeochemical cycles and in the transfer of matter in food webs is globally recognized, specific knowledge on elemental concentrations and their variability within this community is still poorly documented. Here, we report for the first time in the Bay of Biscay, North-East Atlantic, the body composition in various biological parameters and chemical elements of a meso-to bathypelagic micronektonic community. Stable carbon and nitrogen isotope compositions (δ13C, δ15N), C:N ratios, energy density, as well as the concentrations in 6 macro-minerals and 13 trace elements including essential (micro-nutrients) and non-essential elements (undesirables, with no know biological function) were measured in whole organisms of 4 crustacean and 11 fish species caught simultaneously around 800 m depth. The results showed a low variability of δ13C values, confirming that all studied species share the same habitat. On the contrary, large differences were observed among species for several elements. Trace elements showed the greatest variability (i.e. larger range of values), especially silver (Ag), arsenic (As), cadmium (Cd), cobalt and vanadium. Significant differences were also revealed among taxa for Ag, As, Cd, copper and strontium concentrations (with crustaceans > fish), as well as for δ15N values and phosphorus concentrations (with fish > crustaceans). Although concentrations varied greatly among species, they could be grouped according to their energy density and composition in 19 chemical elements, through hierarchical clustering analysis. Six functional groups of species have been thus identified, reflecting contrasted nutritional benefit and/or exposure to undesirables for predators feeding on this deep pelagic community. Finally, the concentrations measured for the potentially toxic trace elements (undesirables) exceeded the existing European thresholds for Cd and to a lesser extent mercury (Hg), which point out potential risks in the perspective of a future exploitation of these deep living resources by humans.
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Affiliation(s)
- Tiphaine Chouvelon
- Observatoire Pelagis, UMS 3462 La Rochelle Université/CNRS, 5 Allées de L'Océan, 17000, La Rochelle, France; Ifremer, Unité Biogéochimie et Écotoxicologie, Laboratoire de Biogéochimie des Contaminants Métalliques (BE/LBCM), Rue de L'Ile D'Yeu, BP 21105, 44311, Nantes Cedex 03, France.
| | - Catherine Munschy
- Ifremer, Unité Biogéochimie et Écotoxicologie, Laboratoire de Biogéochimie des Contaminants Organiques (BE/LBCO), Rue de L'Ile D'Yeu, BP 21105, 44311, Nantes Cedex 03, France
| | - Sandrine Bruzac
- Ifremer, Unité Biogéochimie et Écotoxicologie, Laboratoire de Biogéochimie des Contaminants Métalliques (BE/LBCM), Rue de L'Ile D'Yeu, BP 21105, 44311, Nantes Cedex 03, France
| | - Florence Caurant
- Observatoire Pelagis, UMS 3462 La Rochelle Université/CNRS, 5 Allées de L'Océan, 17000, La Rochelle, France; Centre D'Etudes Biologiques de Chizé (CEBC), UMR 7372 La Rochelle Université/CNRS, 405 Route de Prissé La Charrière, 79360, Villiers-en-Bois, France
| | - Carine Churlaud
- Littoral Environnement et Sociétés (LIENSs), UMR 7266 La Rochelle Université/CNRS, 2 Rue Olympe de Gouges, 17000, La Rochelle, France
| | - Sylvette Crochet
- Ifremer, Unité Biogéochimie et Écotoxicologie, Laboratoire de Biogéochimie des Contaminants Métalliques (BE/LBCM), Rue de L'Ile D'Yeu, BP 21105, 44311, Nantes Cedex 03, France
| | - Gaël Guillou
- Littoral Environnement et Sociétés (LIENSs), UMR 7266 La Rochelle Université/CNRS, 2 Rue Olympe de Gouges, 17000, La Rochelle, France
| | - Aourell Mauffret
- Ifremer, Unité Biogéochimie et Écotoxicologie (BE), Rue de L'Ile D'Yeu, BP 21105, 44311, Nantes Cedex 03, France
| | - Paula Méndez-Fernandez
- Observatoire Pelagis, UMS 3462 La Rochelle Université/CNRS, 5 Allées de L'Océan, 17000, La Rochelle, France
| | - Jasmin Niol
- Observatoire Pelagis, UMS 3462 La Rochelle Université/CNRS, 5 Allées de L'Océan, 17000, La Rochelle, France
| | - Teddy Sireau
- Ifremer, Unité Biogéochimie et Écotoxicologie, Laboratoire de Biogéochimie des Contaminants Métalliques (BE/LBCM), Rue de L'Ile D'Yeu, BP 21105, 44311, Nantes Cedex 03, France
| | - Claire Steinberg
- Ifremer, Unité Biogéochimie et Écotoxicologie, Laboratoire de Biogéochimie des Contaminants Métalliques (BE/LBCM), Rue de L'Ile D'Yeu, BP 21105, 44311, Nantes Cedex 03, France
| | - Nathalie Wessel
- Ifremer, Service Valorisation de L'Information pour La Gestion Intégrée et La Surveillance (VIGIES), Rue de L'Ile D'Yeu, BP 21105, 44311, Nantes Cedex 03, France
| | - Jérôme Spitz
- Observatoire Pelagis, UMS 3462 La Rochelle Université/CNRS, 5 Allées de L'Océan, 17000, La Rochelle, France; Centre D'Etudes Biologiques de Chizé (CEBC), UMR 7372 La Rochelle Université/CNRS, 405 Route de Prissé La Charrière, 79360, Villiers-en-Bois, France
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Marangi M, Airoldi S, Beneduce L, Zaccone C. Wild whale faecal samples as a proxy of anthropogenic impact. Sci Rep 2021; 11:5822. [PMID: 33712645 DOI: 10.1038/s41598-021-84966-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Accepted: 02/23/2021] [Indexed: 01/04/2023] Open
Abstract
The occurrence of protozoan parasite, bacterial communities, organic pollutants and heavy metals was investigated in free-ranging species of fin (Balaenoptera physalus, n. 2) and sperm (Physeter macrocephalus, n. 2) whales from the Pelagos Sanctuary, Corsican-Ligurian Provencal Basin (Northern-Western Mediterranean Sea). Out of four faecal samples investigated, two from fin whales and one from sperm whale were found positive to Blastocystis sp. A higher number of sequences related to Synergistetes and Spirochaetae were found in sperm whales if compared with fin whales. Moreover, As, Co and Hg were found exclusively in sperm whale faecal samples, while Pb was found only in fin whale faecal samples. The concentration of both PAH and PCB was always below the limit of detection. This is the first report in which the presence of these opportunistic pathogens, bacteria and chemical pollutants have been investigated in faecal samples of free-ranging whale species and the first record of Blastocystis in fin and sperm whales. Thus, this study may provide baseline data on new anthropozoonotic parasite, bacterial records and heavy metals in free-ranging fin and sperm whales, probably as a result of an increasing anthropogenic activity. This survey calls for more integrated research to perform regular monitoring programs supported by national and/or international authorities responsible for preservation of these still vulnerable and threatened whale species in the Mediterranean Sea.
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Wiech M, Silva M, Meier S, Tibon J, Berntssen MHG, Duinker A, Sanden M. Undesirables in Mesopelagic Species and Implications for Food and Feed Safety-Insights from Norwegian Fjords. Foods 2020; 9:E1162. [PMID: 32846889 PMCID: PMC7555207 DOI: 10.3390/foods9091162] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 08/13/2020] [Accepted: 08/18/2020] [Indexed: 12/26/2022] Open
Abstract
The increase in the global population demands more biomass from the ocean as future food and feed, and the mesopelagic species might contribute significantly. In the present study, we evaluated the food and feed safety of six of the most abundant mesopelagic species in Norwegian fjords. Trace elements (i.e., arsenic, cadmium, mercury, and lead), organic pollutants (i.e., dioxins, furans, dioxin-like polychlorinated biphenyls, and polybrominated flame-retardants), and potentially problematic lipid compounds (i.e., wax esters and erucic acid) were analyzed and compared to existing food and feed maximum levels and intake recommendations. Furthermore, contaminant loads in processed mesopelagic biomass (protein, oil, and fish meal) was estimated using worst-case scenarios to identify possible food and feed safety issues. While most undesirables were low considering European food legislation, we identified a few potential food safety issues regarding high levels of fluoride in Northern krill, wax esters in glacier lanternfish, and long-chain monounsaturated fatty acids in silvery lightfish. Our estimates in processed biomass indicated high levels of undesirable trace elements in the protein fraction, frequently exceeding the maximum levels for feed ingredients. However, in fish meal, almost no exceedances were seen. In the oil fraction, dioxins and furans were above the maximum levels, given for food and feed ingredients. The present study is crucial to enable an evaluation of the value of these species; however, more data is needed before proceeding with large-scale harvesting of mesopelagic biomass.
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Affiliation(s)
- Martin Wiech
- Institute of Marine Research, Nordnes, P.O. Box 1870, NO-5817 Bergen, Norway; (M.S.); (S.M.); (J.T.); (M.H.G.B.); (A.D.); (M.S.)
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6
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Dural M, Bickici E. Distribution of Trace Elements in the Tissues of Upeneus pori and Upeneus molucensis from the Eastern Cost of Mediterranean,Iskenderun Bay, Turkey. ACTA ACUST UNITED AC 2010. [DOI: 10.3923/javaa.2010.1380.1383] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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7
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Rosen G, Rivera-Duarte I, Chadwick DB, Ryan A, Santore RC, Paquin PR. Critical tissue copper residues for marine bivalve (Mytilus galloprovincialis) and echinoderm (Strongylocentrotus purpuratus) embryonic development: conceptual, regulatory and environmental implications. Mar Environ Res 2008; 66:327-336. [PMID: 18579199 DOI: 10.1016/j.marenvres.2008.05.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2007] [Revised: 01/04/2008] [Accepted: 05/14/2008] [Indexed: 05/26/2023]
Abstract
Critical tissue copper (Cu) residues associated with adverse effects on embryo-larval development were determined for the Mediterranean mussel (Mytilus galloprovincialis) and purple sea urchin (Strongylocentrotus purpuratus) following laboratory exposure to Cu-spiked seawater collected from San Diego Bay, California, USA. Whole body no-observed-effect-residues (NOER) were similar, with means of 21 and 23 microg g(-1) dw, for M. galloprovincialis and S. purpuratus, respectively. Mean whole body median effect residues (ER50) were 49 and 142 microg g(-1) dw for M. galloprovincialis and S. purpuratus, respectively. The difference in ER50s between species was reduced to a factor of <2 when expressed as soft tissue residues. Coefficients of variation among whole body-ER50s were 3-fold lower than median waterborne effect concentrations (EC50) for both species exposed to samples varying in water quality characteristics. This suggests that tissue concentrations were a better predictor of toxicity than water concentrations. The CBRs described herein do not differentiate between the internal Cu concentrations that are metabolically available and those that are accumulated and then detoxified. They do appear, however, to be well enough related to the level of accumulation at the site of action of toxicity that they serve as useful surrogates for the copper concentration that affects embryonic development of the species tested. Results presented have potentially important implications for a variety of monitoring and assessment strategies. These include regulatory approaches for deriving saltwater ambient water quality criteria for Cu, contributions towards the development of a saltwater biotic ligand model, the conceptual approach of using CBRs, and ecological risk assessment.
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Affiliation(s)
- Gunther Rosen
- Space and Naval Warfare Systems Center, Environmental Sciences and Applied Systems Branch, Code 71750, 53475 Strothe Road, San Diego, CA 92152, USA.
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8
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Singh RK, Chavan SL, Sapkale PH. Heavy metal concentrations in water, sediments and body tissues of red worm (Tubifex spp.) collected from natural habitats in Mumbai, India. Environ Monit Assess 2007; 129:471-81. [PMID: 17057966 DOI: 10.1007/s10661-006-9377-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2006] [Accepted: 06/28/2006] [Indexed: 05/12/2023]
Abstract
Live feeds, especially Tubifex spp., which are collected from a wide variety of polluted habitats, are used by aquarium fish keepers in India. These habitats receive domestic sewage and industrial wastes from nearby residential and industrial areas. Reports of morbidity and mortality from aquarium fish culturists in and around Mumbai led to the present investigations on the ecology of these habitats with a view to assess the water quality, presence of heavy metals in the environment and their bioaccumulation in Tubifex worms, and to examine whether these habitats could be exploited to meet the demand of the industry. Six natural red worm (Tubifex spp.) collection centres in Mumbai and Thane districts of Maharashtra state in India constituting a major source of live Tubifex supply to aquarium fish industry were evaluated for pollution, heavy metal concentration in water, sediments and in the body tissues of Tubifex. Data revealed the presence of heavy metals in water and sediments at collection sites and bioaccumulation of cadmium, iron, lead, zinc and copper in body tissues of Tubifex worms. Cadmium ranged from 2.38 to 7.21 mg/kg, iron 671.9 to 5738 mg/kg, lead 14.95 to 33.49 mg/kg, zinc 60.20 to 166.60 mg/kg and copper 29.38 to 108.90 mg/kg of dry Tubifex worms. The study suggests that all the six collection sites are polluted and the red worms contaminated with heavy metals and hence, unfit for use in aquaria or feeding any variety of fish or crustaceans in the hatcheries.
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Affiliation(s)
- Ravendra Kumar Singh
- Taraporevala Marine Biological Research Station, Government Colony, Bandra (E), Mumbai 400051, India.
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Roditi-Elasar M, Kerem D, Hornung H, Kress N, Shoham-Frider E, Goffman O, Spanier E. Heavy metal levels in bottlenose and striped dolphins off the Mediterranean coast of Israel. Mar Pollut Bull 2003; 46:503-512. [PMID: 12705924 DOI: 10.1016/s0025-326x(03)00003-1] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Affiliation(s)
- Mia Roditi-Elasar
- Israel Marine Mammal Research & Assistance Center, The Leon Recanati Institute for Maritime Studies and Department for Maritime Civilizations, The University of Haifa, Mt. Carmel, 31905, Haifa, Israel
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Storelli MM, Giacominelli-Stuffler R, Marcotrigiano GO. Total and methylmercury residues in cartilaginous fish from Mediterranean Sea. Mar Pollut Bull 2002; 44:1354-1358. [PMID: 12523539 DOI: 10.1016/s0025-326x(02)00223-0] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Concentrations of mercury and methylmercury residues were determined in the muscle tissue of three cartilaginous fishes Chimaera monstrosa (ghostshark), Torpedo nobiliana (electric ray) and Myliobatis aquila (eagle ray) from the Mediterranean Sea. The highest mean levels of total mercury were detected in ghostshark (3.14 mg/kg wet weight), followed by electric ray (2.42 mg/kg wet weight), and eagle ray (0.83 mg/kg wet weight). Such a variability is influenced by quite a number of factors, among which size, fish ecology and feeding habits. The percentages of the methylated form to total mercury ranged from a minimum of 72% in eagle ray to a maximum of 83% in ghostshark. Relationship between specimen size and mercury and methylmercury concentrations were found in ghostshark species.
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Affiliation(s)
- M M Storelli
- Pharmacological-Biological Department, Chemistry and Biochemistry Section, Veterinary Medicine Faculty, University of Bari, Strada Prov le per Casamassima Km 3, 70010 Valenzano, Bari, Italy
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Abstract
During the period 1997-1998, macroalgae, sea snail, mussel, fish and sediment samples were collected at different stations of the Turkish Black Sea coast in order to establish the concentration of selected heavy metals. Heavy metals analyzed were Cd, Co, Cr, Ni, Zn, Fe, Mn, Pb and Cu. The results showed that the Turkish Black Sea coast is facing heavy metal pollution. The metal concentrations in macroalgae, sea snail, mussel and sediment samples are very high. However, Cd, Pb and Cu concentrations in anchovy fish decreased, while Co, Fe, Zn, Cr, Mn and Ni contents had changed when compared previous data. The metal levels in macroalgae did not follow the same pattern as concentrations in sediments at the same station. On the other hand, concentrations of Cd, Co, Cr, Zn, Fe, Mn and Cu in sea snail, mussel and fish samples were related to sediment data in the examined stations.
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Affiliation(s)
- S Topcuoğlu
- Cekmece Nuclear Research and Training Center, Atatürk Airport, Istanbul, Turkey.
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Abstract
The bioaccumulation of four metals (Cd, Cu, Pb, Zn) dissolved in water was assessed measuring the concentrations recorded within sea-urchin larvae (Paracentrotus lividus, Lmk.) after a 48-h exposure period. Concurrently, the frequencies of abnormalities were evaluated at the 48-h pluteus stage to check the actual toxicity of such contaminants with regards to larval development. Maximum metal concentrations in the larvae reached 43.8 +/- 6.7 micrograms Cd g-1 dry weight (d.w.), 1269 +/- 392 micrograms Cu g-1 d.w., 3106 +/- 679 micrograms Pb g-1 d.w., 534 +/- 62 micrograms Zn g-1 d.w. Bioconcentration factors (BCFs) reached very high values for Pb (maximum value: 16,282 +/- 973) and indicated that the concentrations of Pb and Cd were directly related to the water concentration at least in the range of concentrations tested. Zn appeared to be partially regulated above a certain threshold concentration (between 5 and 25 micrograms l-1). Cu was accumulated with an active uptake at least below lethal threshold level (100 micrograms l-1). Nevertheless, above these thresholds, high mortality of embryos prevent any interpretation of Zn and Cu bioconcentration factors. Concurrent studies carried out on embryotoxicity confirmed the high toxicity of Cu towards sea-urchin pluteus larvae and highlighted the different behaviour of Cd. The internal Cd concentrations were directly related to the external ones, comparable to other non-essential metals, but Cd had little toxic effect on the initial larval development.
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Affiliation(s)
- G Radenac
- Laboratoire de Biologie et d'Environnement Marins, Institut de la Mer et du Littoral, Université de La Rochelle, Port des Minimes, 17000 La Rochelle, France.
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Abstract
Cadmium, copper, zinc and mercury concentrations were determined in pelagic and benthic fishes from the Mauritania coast. The pelagic fishes consisted of the round sardinella Sardinella aurita (Clupeidae), the chub mackerel Scomber japonicus (Scombridae) and the Atlantic horse mackerel Trachurus trachurus (Carangidae). Four benthic species were considered, three Serranidae: the painted comber Serranus scriba, the golden grouper Epinephelus costae, and the Niger hind Cephalopholis nigri and one Mullidae: the West African goatfish Pseudupeneus prayensis. Cadmium, copper, zinc and mercury concentrations are low in the edible muscles of the pelagic species. In the benthic fishes, metals could be determined also in the gills and liver. Cadmium and copper were present in relatively low levels in the muscle (< or = 0.06 microgram Cd g-1 dry wt., < or = 1.6 micrograms Cu g-1 dry wt.) and gills (< or = 0.23 microgram Cd g-1, < or = 3.1 micrograms Cu g-1) and higher levels are encountered in the livers (< or = 51 micrograms Cd g-1, < or = 49.1 micrograms Cu g-1). Zinc concentrations in the muscle are low (< or = 20 micrograms Zn g-1 dry wt.), the concentrations in the gills (< or = 120 micrograms Zn g-1) approach those of the livers for C. nigri and P. prayensis or are higher in the case of S. scriba and E. costae. Mercury concentrations in the gills and muscle of the pelagic species are very low, higher quantities are found in the livers of the benthic species. The metal concentrations in all the fishes analysed, which are restricted to approximately 40 specimens, are low except those found for cadmium in the livers of the benthic fishes.
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Affiliation(s)
- M Roméo
- Laboratoire de Physiologie et Toxicologie Environnementales, Faculté des Sciences, Université de Nice-Sophia Antipolis, France.
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