The relationship between pink salmon biomass and the body condition of short-tailed shearwaters in the Bering Sea : can fish compete with seabirds?

Toge, Kanako; Yamashita, Rei; Kazama, Kentaro; Fukuwaka, Masaaki; Yamamura, Orio; Watanuki, Yutaka

The relationship between pink salmon biomass and the body condition of short-tailed shearwaters in the Bering Sea : can fish compete with seabirds?

Toge, Kanako; Yamashita, Rei; Kazama, Kentaro et al.

Proceedings of the Royal Society B : Biological Sciences, 2011, 278(1718), 2584-2590

Permalink : https://hdl.handle.net/2115/47073

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アクセス権	open access
URI	https://hdl.handle.net/2115/47073
タイトル	The relationship between pink salmon biomass and the body condition of short-tailed shearwaters in the Bering Sea : can fish compete with seabirds?
著者	Toge, Kanako ; Yamashita, Rei ; Kazama, Kentaro ; Fukuwaka, Masaaki ; Yamamura, Orio ; Watanuki, Yutaka
著者名 Toge, Kanako
著者名 Yamashita, Rei
著者名 Kazama, Kentaro
著者名 Fukuwaka, Masaaki
著者名 Yamamura, Orio
e-Rad_Researcher 40192819 著者名 Watanuki, Yutaka
言語	英語
キーワード	top predator
	marine ecosystem
	competition
	body condition
	prey
発行日	2011-09-07
出版者	The Royal Society
収録物名	Proceedings of the Royal Society B : Biological Sciences
巻(号)	278(1718)
ページ	2584-2590
抄録	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.
資源タイプ	学術雑誌論文
出版タイプ	Accepted Manuscript
PISSN	0962-8452
関連情報	URI http://rspb.royalsocietypublishing.org/
関連情報 (isVersionOf)	出版社版DOI https://doi.org/10.1098/rspb.2010.2345