MISC

2010年7月

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)

DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY
  • Michio J. Kishi
  • ,
  • Masahide Kaeriyama
  • ,
  • Hiromichi Ueno
  • ,
  • Yasuko Kamezawa

57
13-14
開始ページ
1257
終了ページ
1265
記述言語
英語
掲載種別
DOI
10.1016/j.dsr2.2009.12.013
出版者・発行元
PERGAMON-ELSEVIER SCIENCE LTD

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 1970 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. (C) 2010 Elsevier Ltd. All rights reserved.

Web of Science ® 被引用回数 : 18

リンク情報
DOI
https://doi.org/10.1016/j.dsr2.2009.12.013
CiNii Articles
http://ci.nii.ac.jp/naid/120002223734
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000279305000015&DestApp=WOS_CPL

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