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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)

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タイトル: 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)
著者: Kishi, Michio J. 著作を一覧する
Kaeriyama, Masahide 著作を一覧する
Ueno, Hiromichi 著作を一覧する
Kamezawa, Yasuko 著作を一覧する
キーワード: bioenergetics model
Japanese chum salmon
size reduction
NEMURO
global warming
発行日: 2010年 7月
出版者: Elsevier
誌名: 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
出版社 DOI: 10.1016/j.dsr2.2009.12.013
抄録: 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.
関連URI: http://www.sciencedirect.com/science/journal/09670645
資料タイプ: article (author version)
URI: http://hdl.handle.net/2115/43182
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 岸 道郎

 

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