Legacy and emerging organic contaminants: Levels and profiles in top predator fish from the western Indian Ocean in relation to their trophic ecology

Munschy, Catherine; Vigneau, Évelyne; Bely, N.; Héas-Moisan, K.; Olivier, Nathalie; Pollono, C.; Hollanda, Stéphanie; Bodin, Nathalie

doi:10.1016/j.envres.2020.109761

Cited by 35 publications

(20 citation statements)

References 108 publications

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“…Concentrations of ∑PFCAs, including long-chain compounds (C ≥ 8), were higher than PFOS concentrations (on average by a factor of 11 and 17 in bull and tiger sharks, respectively) in all samples (the above-mentioned male bull shark outlier excluded), consistent with the higher bioaccumulative abilities of these compounds versus their short-chain counterparts (Kelly et al, 2009;Martin et al, 2003;Pan et al, 2014). More specifically, PFCA profiles showed a predominance of odd-chain length compounds (PFTrDA and PFUnDA) versus even-chain (PFDA, PFDoDA and PFTeDA) (Figure 4), as previously observed in fish (Martin et al, 2003;Sturm and Ahrens, 2010), including in the Indian Ocean (Munschy et al, 2020).…”

Section: Pfasssupporting

confidence: 86%

“…Extractable organic matter, used as a proxy for total lipid content (TLC), was determined with 0.5 g dry weight (dw) of sample extracted with a mixture of n-hexane and acetone (80/20 volume/volume [v/v]) using pressurized liquid extraction (PLE) at 100 °C under 10 MPa by means of an ASE 350 (Dionex©) (Munschy et al, 2020). The extracts were evaporated to dryness and TLC was determined gravimetrically and expressed in % of wet weight (ww).…”

Section: Total Lipid Content Analysismentioning

confidence: 99%

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Legacy and emerging organic contaminants in two sympatric shark species from Reunion Island (Southwest Indian Ocean): Levels, profiles and maternal transfer

Chynel

Munschy

Bely

et al. 2021

Science of The Total Environment

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The contamination of tiger sharks (Galeocerdo cuvier) and bull sharks (Carcharhinus leucas) by legacy persistent organic pollutants (POPs) and emerging organic contaminants was investigated in specimens from Reunion Island (Southwest Indian Ocean) in 2018 and 2019. Contamination levels were determined in the muscle of adult individuals of both sexes in relation to biological and trophic parameters. Maternal transfer was additionally investigated in one set of embryos in each species. Polychlorinated biphenyl (PCB), organochlorinated pesticide (OCP) and perfluoroalkylated substance (PFAS) concentrations were 2597 ± 2969, 785 ± 966 and 267 ± 194 pg g-1 ww, respectively, in bull sharks, and 339 ± 270, 1025 ± 946 and 144 ± 53 pg g-1 ww in tiger sharks. The results highlighted higher PCB contamination, and by the heavier congeners, in adult bull sharks versus tiger sharks. The significant differences found in PCB profiles and concentrations suggest that the two species are exposed to different contamination sources. As bull sharks rely on a more coastal habitat for feeding, their higher contamination by PCBs suggests the occurrence of local PCB sources. DDT concentrations were similar in both species, suggesting a more homogeneous contamination on the scale of the Southwest Indian Ocean. Female bull sharks showed lower OCP and PCB concentrations than males, while this trend was not observed in tiger sharks. The ratio of chlorinated contaminants in muscle between the mother and her embryos was related to molecule hydrophobicity in bull shark but not in tiger shark, suggesting that shark mode of gestation, known to be different in the two species, is a key driver of organic contaminant maternal transfer. Finally, the results show that organic contaminant levels in the studied species were lower than those of other shark species in the Southern Hemisphere, related to the limited urbanization and industrialization of Reunion Island.Please note that this is an author-produced PDF of an article accepted for publication following peer review. The definitive publisher-authenticated version is available on the publisher Web site.

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Section: Pfasssupporting

confidence: 86%

Section: Total Lipid Content Analysismentioning

confidence: 99%

Legacy and emerging organic contaminants in two sympatric shark species from Reunion Island (Southwest Indian Ocean): Levels, profiles and maternal transfer

Chynel

Munschy

Bely

et al. 2021

Science of The Total Environment

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“…Sources and quality of chemicals and standards used for sample clean-up (trace analysis quality) were reported in details by Munschy et al ( 2020 ). Additional chemicals used for HNP analysis were iso -octane (>99.0%) from Riedel-de Haen (Steinheim, Germany).…”

Section: Methodsmentioning

confidence: 99%

“…Freeze-dried samples were sent to LBCO at Ifremer, Nantes, France, for organic contaminant and total lipid content analysis. The fish samples were processed as described by Munschy et al ( 2020 ). Briefly, each freeze-dried and ground sample was extracted with dichloromethane using accelerated solvent extraction (ASE 300, Dionex, USA) and then successively purified using gel permeation chromatography, a silica and alumina column and a two-dimensional HPLC system with two columns coupled in series (Munschy et al 2020 ).…”

Section: Methodsmentioning

confidence: 99%

“…The fish samples were processed as described by Munschy et al ( 2020 ). Briefly, each freeze-dried and ground sample was extracted with dichloromethane using accelerated solvent extraction (ASE 300, Dionex, USA) and then successively purified using gel permeation chromatography, a silica and alumina column and a two-dimensional HPLC system with two columns coupled in series (Munschy et al 2020 ). Aliquots of each purified sample extract were manually transported to the University of Hohenheim for analysis of HNPs and POPs.…”

Section: Methodsmentioning

confidence: 99%

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High levels of halogenated natural products in large pelagic fish from the Western Indian Ocean

Munschy

Aminot

et al. 2021

Environ Sci Pollut Res

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Concentrations, profiles and muscle-liver distribution of halogenated natural products (HNPs) and anthropogenic persistent organic pollutants (POPs) were investigated in five large pelagic fish species and one smaller planktivore fish species from the Western Indian Ocean. Analysis of swordfish muscle from the Seychelles revealed the predominance of HNPs, with the highest concentrations found for 2′-methoxy-2,3′,4,5′- tetraBDE (2′-MeO-BDE 68 or BC-2), 6-methoxy-2,2′,4,4′- tetraBDE (6-MeO-BDE 47 or BC-3) and 2,3,3′,4,4′,5,5′-heptachloro-1′-methyl-1,2′-bipyrrole (Q1), along with varied contributions of further HNPs. The mean concentration of ∑HNPs (330 ng/g lw) was one or two orders of magnitude higher than ∑DDTs (60 ng/g lw) and ∑PCBs (6.8 ng/g lw). HNPs (BC-2, BC-3 and Q1) were also predominant in individual samples of three tropical tuna species from the Seychelles and from other regions of the Western Indian Ocean (Mozambique Channel, off Somalia and Chagos Archipelago). Non-targeted gas chromatography coupled with electron capture negative ion mass spectrometry operated in the selected ion monitoring mode (GC/ECNI-MS-SIM) analysis of one swordfish sample indicated low abundance of rarely reported HNPs (three hexachloro-1′-methyl-1,2′-bipyrrole (Cl6-MBP) isomers and pentabromo-1,1′-dimethyl-2,2′-bipyrroles (Br5-DBP)) but no further abundant unscreened polyhalogenated compounds.

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Spatial Variation in Contaminant Occurrence in Marine Fishes and Prawns from Coastal Tanzania

Haarr

Mwakalapa

Lyche

et al. 2022

Enviro Toxic and Chemistry

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There are limited data on organic contaminants in marine biota from coastal Tanzania, especially on the occurrence of industrial‐use contaminants such as polychlorinated biphenyls (PCBs) and polybrominated diphenyl ethers (PBDEs). The present study, performed in 2018–2019 in coastal Tanzania and Zanzibar Island, aimed at assessing spatial variation in the occurrence of PCBs; brominated flame retardants (BFRs), including PBDEs; and organochlorine pesticides, including dichlorodiphenyltrichloroethane (DDT), among three locations that differ in degree of anthropogenic activity. Analyzed samples included edible tissues of marine fishes and prawns representing different trophic levels and habitats. The results indicate a mainland–island difference, with fishes and prawns collected on Zanzibar having significantly lower PCB and DDT concentrations but higher concentrations of hexachlorobenzene compared to the two mainland locations. The highest contaminant concentrations were found in fishes and prawns collected around central Dar es Salaam harbor, with median ΣPCBs ranging from 22.3 to 577 ng/g lipid weight and ΣDDTs from 22.7 to 501 ng/g lipid weight, suggesting local sources. Concentrations of PBDEs were similar among locations, suggesting more diffuse sources. None of the “newer‐type” BFRs, including compounds introduced as replacements for PBDEs, were detected in the present study. Stable isotope values of carbon (δ13C) and nitrogen (δ15N) varied among locations, and the relationship between contaminants and δ15N varied among locations and habitat (pelagic/demersal). Concentrations measured in the present study are below European guidelines for human consumption of fishes and prawns. However, industrial‐use contaminants should be monitored in developing countries because they are contaminants of emerging concern as a result of increasing industrialization and global trade of used products and wastes. Environ Toxicol Chem 2022;41:321–333. © 2021 The Authors. Environmental Toxicology and Chemistry published by Wiley Periodicals LLC on behalf of SETAC.

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Legacy and emerging organic contaminants: Levels and profiles in top predator fish from the western Indian Ocean in relation to their trophic ecology

Cited by 35 publications

References 108 publications

Legacy and emerging organic contaminants in two sympatric shark species from Reunion Island (Southwest Indian Ocean): Levels, profiles and maternal transfer

Legacy and emerging organic contaminants in two sympatric shark species from Reunion Island (Southwest Indian Ocean): Levels, profiles and maternal transfer

High levels of halogenated natural products in large pelagic fish from the Western Indian Ocean

Spatial Variation in Contaminant Occurrence in Marine Fishes and Prawns from Coastal Tanzania

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