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首页> 外文期刊>ICES Journal of Marine Science >Stable isotope analysis of marine feeding signatures of Atlantic salmon in the North Atlantic
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Stable isotope analysis of marine feeding signatures of Atlantic salmon in the North Atlantic

机译：北大西洋大西洋鲑海洋摄食特征的稳定同位素分析

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摘要

Differences in the marine feeding of three geographically distinct populations of Atlantic salmon (Salmo salar) in the North Atlantic (Conne River, Newfoundland; Koksoak River, Ungava Bay, Quebec; River Erne, northwest Ireland) were examined using analyses of stable isotopes of carbon and nitrogen (δ~(13)C and δ~(15)N) and contrasted with isotope signatures obtained from a sample of salmon of unknown origin captured in the Labrador Sea. Although the overall range of δ~(13)C and δ~(15)N values (δ~(13)C: x from -22.42 to -19.37; δ~(15)N: x from 10.70 to 13.38) was similar to that reported by others, significant differences were found among populations and between different sea-age life-history groups. Reported differences in marine feeding between populations from the Northeast and Northwest Atlantic corroborated the stable isotope results. A surrogate measure of lipid content, the C:N ratio, was also compared among 1-sea-winter salmon. The highest levels were associated with the Koksoak River, suggesting that Subarctic populations may require higher energy reserves to contend with their longer migrations and more-severe environmental conditions.
机译：通过使用稳定碳同位素分析，研究了北大西洋（纽芬兰的科恩河；魁北克的Ungava湾的科克索克河；爱尔兰西北的厄恩河）三个地理上不同的大西洋鲑鱼（Salmo salar）的海洋饲养差异。和氮（δ〜（13）C和δ〜（15）N），并与从拉布拉多海捕获的未知来源的鲑鱼样本获得的同位素特征形成对比。尽管δ〜（13）C和δ〜（15）N值的总范围（δ〜（13）C：x从-22.42到-19.37;δ〜（15）N：x从10.70到13.38）相似与其他人所报告的相比，在人群之间以及不同的海洋年龄生活史组之间发现了显着差异。据报道，东北大西洋和西北大西洋各种群之间海洋喂养的差异证实了稳定的同位素结果。还比较了1冬季冬季鲑鱼中脂质含量的替代量度（C：N比）。最高的水位与Koksoak河有关，这表明亚北极人口可能需要更高的能量储备来应对其更长的迁徙时间和更严峻的环境条件。

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