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Organochlorine accumulation and stable isotope ratios in an Atlantic salmon (Salmo salar) population from the Baltic Sea

Berglund, Olof LU ; Larsson, Per LU and Broman, D (2001) In Science of the Total Environment 281(1-3). p.141-151
Abstract
We investigated the organochlorine accumulation (p,p′-DDE and ∑PCB) and stable isotope ratios (N and C) in a migrating salmon (Salmo salar) population in the Baltic Sea. ∂15N in the entire population ranged from 11.7 to 13.7‰ and ∂13C ranged from −22.0 to −19.6‰. In the entire population, ∂15N were weakly related to p,p′-DDE and ∑PCB concentrations (r2=0.20 and 0.14, respectively). However, lipid content was a better predictor of organochlorine (OC) concentrations (r2=0.48 and 0.50, respectively). Lipid adjusted ∑PCB concentrations were not related to ∂15N, and lipid adjusted p,p′-DDE concentrations were only weakly related (r2=0.12). We divided the salmon population into three groups representing reproductive strategies: small males <5... (More)
We investigated the organochlorine accumulation (p,p′-DDE and ∑PCB) and stable isotope ratios (N and C) in a migrating salmon (Salmo salar) population in the Baltic Sea. ∂15N in the entire population ranged from 11.7 to 13.7‰ and ∂13C ranged from −22.0 to −19.6‰. In the entire population, ∂15N were weakly related to p,p′-DDE and ∑PCB concentrations (r2=0.20 and 0.14, respectively). However, lipid content was a better predictor of organochlorine (OC) concentrations (r2=0.48 and 0.50, respectively). Lipid adjusted ∑PCB concentrations were not related to ∂15N, and lipid adjusted p,p′-DDE concentrations were only weakly related (r2=0.12). We divided the salmon population into three groups representing reproductive strategies: small males <5 kg (SM); large males >5 kg (LM); and females (F). ∂15N varied between the three reproductive strategies. The mean ∂15N for SM was 12.7±0.3‰, for F was 12.9±0.3‰, and for LM equalled 13.2±0.3‰. Lipid adjusted OC concentrations differed between the three reproductive strategies, with the females having the highest concentrations. We conclude that the ∂15N varied between reproductive strategies indicating differences in prey choice, but the lipid content was better able to predict OC concentrations than the trophic position of the salmon. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Science of the Total Environment
volume
281
issue
1-3
pages
141 - 151
publisher
Elsevier
external identifiers
  • scopus:0035904922
ISSN
1879-1026
DOI
10.1016/S0048-9697(01)00842-7
language
English
LU publication?
yes
id
210de079-7e99-4513-a052-953eba7a0338 (old id 149836)
date added to LUP
2007-06-27 08:48:14
date last changed
2018-01-07 06:17:20
@article{210de079-7e99-4513-a052-953eba7a0338,
  abstract     = {We investigated the organochlorine accumulation (p,p′-DDE and ∑PCB) and stable isotope ratios (N and C) in a migrating salmon (Salmo salar) population in the Baltic Sea. ∂15N in the entire population ranged from 11.7 to 13.7‰ and ∂13C ranged from −22.0 to −19.6‰. In the entire population, ∂15N were weakly related to p,p′-DDE and ∑PCB concentrations (r2=0.20 and 0.14, respectively). However, lipid content was a better predictor of organochlorine (OC) concentrations (r2=0.48 and 0.50, respectively). Lipid adjusted ∑PCB concentrations were not related to ∂15N, and lipid adjusted p,p′-DDE concentrations were only weakly related (r2=0.12). We divided the salmon population into three groups representing reproductive strategies: small males &lt;5 kg (SM); large males &gt;5 kg (LM); and females (F). ∂15N varied between the three reproductive strategies. The mean ∂15N for SM was 12.7±0.3‰, for F was 12.9±0.3‰, and for LM equalled 13.2±0.3‰. Lipid adjusted OC concentrations differed between the three reproductive strategies, with the females having the highest concentrations. We conclude that the ∂15N varied between reproductive strategies indicating differences in prey choice, but the lipid content was better able to predict OC concentrations than the trophic position of the salmon.},
  author       = {Berglund, Olof and Larsson, Per and Broman, D},
  issn         = {1879-1026},
  language     = {eng},
  number       = {1-3},
  pages        = {141--151},
  publisher    = {Elsevier},
  series       = {Science of the Total Environment},
  title        = {Organochlorine accumulation and stable isotope ratios in an Atlantic salmon (Salmo salar) population from the Baltic Sea},
  url          = {http://dx.doi.org/10.1016/S0048-9697(01)00842-7},
  volume       = {281},
  year         = {2001},
}