| タイトル |
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en
The relationship between pink salmon biomass and the body condition of short-tailed shearwaters in the Bering Sea : can fish compete with seabirds?
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| 作成者 |
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| アクセス権 |
open access |
| 主題 |
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Other
en
top predator
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Other
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marine ecosystem
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Other
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competition
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Other
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body condition
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Other
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prey
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NDC
487
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| 内容注記 |
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Abstract
en
Seabirds and large fishes are important top predators in marine ecosystems, but few studies have explored the potential for competition between these groups. This study investigated the relationship between an observed biennial change of pink salmon (Oncorhynchus gorbuscha) biomass in the central Bering Sea (23 times greater in odd-numbered than in even-numbered years) and the body condition and diet of the short-tailed shearwater (Puffinus tenuirostris) spending post-breeding season there. Samples were collected with research gill nets over seven summers. Both species feed on krill, small fishes and squids. Although the mean pink salmon catch per unit effort (in mass) over the study region was not related significantly with shearwater's stomach content mass or prey composition, the pink salmon biomass showed a negative and significant relationship with the shearwater's body mass and liver mass (proxies of energy reserve). We interpret these results as evidence that fishes can negatively affect mean prey intake of seabirds if they feed on a shared prey in the pelagic ecosystem.
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| 出版者 |
en
The Royal Society
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| 日付 |
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| 言語 |
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| 資源タイプ |
journal article |
| 出版タイプ |
AM |
| 資源識別子 |
HDL
http://hdl.handle.net/2115/47073
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| 関連 |
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URI
http://rspb.royalsocietypublishing.org/
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isVersionOf
DOI
https://doi.org/10.1098/rspb.2010.2345
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| 収録誌情報 |
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en
Proceedings of the Royal Society B : Biological Sciences
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巻278
号1718
開始ページ2584
終了ページ2590
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| ファイル |
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| コンテンツ更新日時 |
2023-07-26 |
