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Organochlorine contaminants in fish from an Arctic lake in Alaska, USA

Identifieur interne : 001226 ( Main/Exploration ); précédent : 001225; suivant : 001227

Organochlorine contaminants in fish from an Arctic lake in Alaska, USA

Auteurs : Rose Wilson [États-Unis] ; Susan Allen-Gil [États-Unis] ; Donald Griffin [États-Unis] ; Dixon Landers [États-Unis]

Source :

RBID : ISTEX:C15D2BF1F0F70E52C0E48924A7CD08FB56620D0C

Descripteurs français

English descriptors

Abstract

A wide range of organochlorine pesticides and polychlorinated biphenyls (PCBs) were measured in muscle tissue and livers of lake trout (Salvelinus namaycush) and Arctic grayling (Thymallus arcticus) from Schrader Lake in Arctic Alaska. Results confirm the long-range transport of these contaminants to a US Arctic freshwater system. The most abundant group of compounds in all tissues was composed of PCBs. Mean concentrations of the sum of a selected group of PCB congeners ranged from 3.2 ng/g in grayling liver to 22.8 ng/g in trout liver and from 1.3 ng/g in grayling muscle to 6.6 ng/g in trout muscle (wet wt.). The second most abundant group was composed of chlordane-related compounds. No significant correlations of organochlorine concentrations with fish weight or length were observed for the data set as a whole. There were marked differences in ΣPCB, Σchlordane andp,p′-DDE concentrations between species. The biomagnification factors for these compounds are similar to ratios reported for other aquatic systems. Comparisons showed that contaminant concentrations in lake trout from Schrader Lake were similar to levels found in burbot and slightly higher than levels in whitefish reported in Canadian studies from the Mackenzie River Delta.

Url:
DOI: 10.1016/0048-9697(95)04385-E


Affiliations:


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Le document en format XML

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<term>Air pollution</term>
<term>Alaska</term>
<term>Alaska (MeSH)</term>
<term>Animals (MeSH)</term>
<term>Arctic</term>
<term>Arctic Region</term>
<term>Arctic Regions (MeSH)</term>
<term>Atmospheric transport</term>
<term>Biological accumulation</term>
<term>Biomagnification</term>
<term>Contaminants</term>
<term>Female (MeSH)</term>
<term>Fishes (metabolism)</term>
<term>Fresh Water (MeSH)</term>
<term>Freshwater</term>
<term>Hydrocarbons, Chlorinated (analysis)</term>
<term>Interspecific comparison</term>
<term>Lakes</term>
<term>Liver (chemistry)</term>
<term>Long range pollutant transport</term>
<term>Male (MeSH)</term>
<term>Muscles (chemistry)</term>
<term>Organochlorine</term>
<term>Organochlorine compounds</term>
<term>PCB</term>
<term>Pesticides</term>
<term>Polychlorobiphenyl</term>
<term>Salmonidae (metabolism)</term>
<term>Trout (metabolism)</term>
<term>Water Pollutants, Chemical (analysis)</term>
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<term>Alaska (MeSH)</term>
<term>Animaux (MeSH)</term>
<term>Eau douce (MeSH)</term>
<term>Femelle (MeSH)</term>
<term>Foie (composition chimique)</term>
<term>Hydrocarbures chlorés (analyse)</term>
<term>Muscles (composition chimique)</term>
<term>Mâle (MeSH)</term>
<term>Poissons (métabolisme)</term>
<term>Polluants chimiques de l'eau (analyse)</term>
<term>Régions arctiques (MeSH)</term>
<term>Salmonidae (métabolisme)</term>
<term>Truite (métabolisme)</term>
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<term>Hydrocarbons, Chlorinated</term>
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<term>Alaska</term>
<term>Arctic Regions</term>
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<term>Liver</term>
<term>Muscles</term>
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<term>Foie</term>
<term>Muscles</term>
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<term>Fishes</term>
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<term>Trout</term>
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<term>Poissons</term>
<term>Salmonidae</term>
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<term>Animals</term>
<term>Female</term>
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<term>Alaska</term>
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<term>Biphényle(polychloro)</term>
<term>Comparaison interspécifique</term>
<term>Eau douce</term>
<term>Femelle</term>
<term>Lac</term>
<term>Lac Schrader</term>
<term>Mâle</term>
<term>Organochloré</term>
<term>Pesticide</term>
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<div type="abstract" xml:lang="en">A wide range of organochlorine pesticides and polychlorinated biphenyls (PCBs) were measured in muscle tissue and livers of lake trout (Salvelinus namaycush) and Arctic grayling (Thymallus arcticus) from Schrader Lake in Arctic Alaska. Results confirm the long-range transport of these contaminants to a US Arctic freshwater system. The most abundant group of compounds in all tissues was composed of PCBs. Mean concentrations of the sum of a selected group of PCB congeners ranged from 3.2 ng/g in grayling liver to 22.8 ng/g in trout liver and from 1.3 ng/g in grayling muscle to 6.6 ng/g in trout muscle (wet wt.). The second most abundant group was composed of chlordane-related compounds. No significant correlations of organochlorine concentrations with fish weight or length were observed for the data set as a whole. There were marked differences in ΣPCB, Σchlordane andp,p′-DDE concentrations between species. The biomagnification factors for these compounds are similar to ratios reported for other aquatic systems. Comparisons showed that contaminant concentrations in lake trout from Schrader Lake were similar to levels found in burbot and slightly higher than levels in whitefish reported in Canadian studies from the Mackenzie River Delta.</div>
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