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Titolo:
Assessment of the contaminant concentration variability among Lake Geneva arctic char using stable isotopic composition (delta N-15 and delta C-13)
Autore:
Dufour, E; Gerdeaux, D; Corvi, C; Khim-Heang, S; Mariotti, A;
Indirizzi:
Univ Paris 06, INRA, CNRS, UMR 7618,Lab Biogeochim Isotop, F-75252 Paris 05, France Univ Paris 06 Paris France 05 iogeochim Isotop, F-75252 Paris 05, France INRA, Lab Hydrobiol Lacustre, F-74703 Thonon Les Bains, France INRA Thonon Les Bains France F-74703 e, F-74703 Thonon Les Bains, France Serv Chimiste Cantonal, CH-1211 Geneva, Switzerland Serv Chimiste Cantonal Geneva Switzerland CH-1211 11 Geneva, Switzerland
Titolo Testata:
ENVIRONMENTAL TOXICOLOGY
fascicolo: 2, volume: 16, anno: 2001,
pagine: 185 - 191
SICI:
1520-4081(200104)16:2<185:AOTCCV>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Soggetto:
TROUT SALVELINUS-NAMAYCUSH; FOOD-WEB STRUCTURE; CARBON ISOTOPES; POLYCHLORINATED BIPHENYL; NITROGEN ISOTOPES; ONTARIO LAKES; BIOACCUMULATION; MERCURY; MODEL; PCB;
Keywords:
Arctic char; organochlorines; mercury; nitrogen and carbon isotopic composition; lipids; interindividual variability; bioaccumulation; Lake Geneva;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
42
Recensione:
Indirizzi per estratti:
Indirizzo: Dufour, E Univ Paris 06, INRA, CNRS, UMR 7618,Lab Biogeochim Isotop, Case 120,4 Pl Jussieu, F-75252 Paris 05, France Univ Paris 06 Case 120,4 Pl Jussieu Paris France 05 05, France
Citazione:
E. Dufour et al., "Assessment of the contaminant concentration variability among Lake Geneva arctic char using stable isotopic composition (delta N-15 and delta C-13)", ENVIRON TOX, 16(2), 2001, pp. 185-191

Abstract

Measurements of organochlorine [polychlorinated biphenyls (PCBs) and dichlorodiphenyl-dichloroethylene (DDE)] and Hg concentrations and nitrogen and carbon stable isotopic compositions (delta N-15 and delta C-13) were performed on 63 Arctic char (Salvelinus alpinus) from Lake Geneva. Fish exhibiteda high interindividual variablity in pollutant concentrations. Since the accumulation of such persistent contaminants is obtained from food, the cc-occurrence of dietary differentiation leading to the contaminant interindividual variability was suspected. delta N-15 and delta C-13 were used for assessing trophic position and food source differences among Arctic char. The low ranges of delta N-15 and delta C-13 could not explain the interindividual variability in pollutant concentrations. The lack of relation between delta N-15 and contaminant concentration did not suggest a trophic level biomagnification of PCB, DDE, and Hg. Lake Geneva spatial variability in pollutants may be an important factor of variability within the Arctic char population. The bioaccumulation pattern occurring for Hg was not apparent for PCB and DDE. Organochlorines are hydrophobic contaminants, and their bioaccumulation pattern may be masked by seasonal variations in fish lipid content. (C) 2001 by John Wiley & Sons, Inc.

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Documento generato il 03/04/20 alle ore 03:20:46