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Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Fisheries Sciences / Faculty of Fisheries Sciences >
Peer-reviewed Journal Articles, etc >
The relationship between pink salmon biomass and the body condition of short-tailed shearwaters in the Bering Sea : can fish compete with seabirds?
| Title: | The relationship between pink salmon biomass and the body condition of short-tailed shearwaters in the Bering Sea : can fish compete with seabirds? |
| Authors: | Toge, Kanako Browse this author | | Yamashita, Rei Browse this author | | Kazama, Kentaro Browse this author | | Fukuwaka, Masaaki Browse this author | | Yamamura, Orio Browse this author | | Watanuki, Yutaka Browse this author →KAKEN DB |
| Keywords: | top predator | | marine ecosystem | | competition | | body condition | | prey |
| Issue Date: | 7-Sep-2011 |
| Publisher: | The Royal Society |
| Journal Title: | Proceedings of the Royal Society B : Biological Sciences |
| Volume: | 278 |
| Issue: | 1718 |
| Start Page: | 2584 |
| End Page: | 2590 |
| Publisher DOI: | 10.1098/rspb.2010.2345 |
| Abstract: | 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. |
| Relation: | http://rspb.royalsocietypublishing.org/ |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/47073 |
| Appears in Collections: | 水産科学院・水産科学研究院 (Graduate School of Fisheries Sciences / Faculty of Fisheries Sciences) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 綿貫 豊
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