The effect of climate change on the growth of Japanese chum salmon (Oncorhynchus keta) using a bioenergetics model coupled with a three-dimensional lower trophic ecosystem model (NEMURO)

Kishi Michio J.; Kaeriyama Masahide; Ueno Hiromichi; Kamezawa Yasuko

タイトル	en The effect of climate change on the growth of Japanese chum salmon (Oncorhynchus keta) using a bioenergetics model coupled with a three-dimensional lower trophic ecosystem model (NEMURO)
作成者	en Kishi, Michio J. NRID 1000090214767 en Kaeriyama, Masahide NRID 1000080305937 en Ueno, Hiromichi NRID 1000090421875 en Kamezawa, Yasuko
アクセス権	open access
主題	Other en bioenergetics model Other en Japanese chum salmon Other en size reduction Other en NEMURO Other en global warming NDC 452
内容注記	Abstract en From the 1970s to 1990s, a reduction in the body size of Japanese chum salmon (Oncorhynchus keta) was observed. To investigate this body size reduction in the North Pacific, we developed a bioenergetics model for chum salmon coupled with the results from a lower trophic ecosystem model embedded into a three-dimensional global model. In the bioenergetics model, respiration and consumption terms are assumed to be functions of water temperature and prey zooplankton density, which are the determining factors of the reduction of body size. The model reproduced the body size of the 1972 and 1991 year classes of chum salmon. The reproduced body size of the 1972 year class was larger than that of 1991 year class, and this result agrees with observations from the Bering Sea. Our model also reproduced the body size trend from l970 to 2000. The prey density, especially in the eastern North Pacific, had a greater influence on the change of body size than did the SST. This suggests that the size reduction of Japanese chum salmon in the 1990s was partly affected by changes in prey zooplankton density. In the context of the global warming scenario, we discuss changes in the migration route of chum salmon and predict that the population of Japanese chum salmon experience significant declines over this century.
出版者	en Elsevier
日付	Issued2010-07
言語	eng
資源タイプ	journal article
出版タイプ	AM
資源識別子	HDL http://hdl.handle.net/2115/43182
関連	URI http://www.sciencedirect.com/science/journal/09670645 isVersionOf DOI https://doi.org/10.1016/j.dsr2.2009.12.013
収録誌情報	PISSN 0967-0645 en Deep Sea Research Part II: Topical Studies in Oceanography 巻57 号13-14 開始ページ1257 終了ページ1265
ファイル	fulltext Kishi.pdf 517.43 KB (application/pdf) Issued2010-07
コンテンツ更新日時	2023-07-26