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

Title	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)
Creator	en Kishi, Michio J. NRID 1000090214767 en Kaeriyama, Masahide NRID 1000080305937 en Ueno, Hiromichi NRID 1000090421875 en Kamezawa, Yasuko
Accessrights	open access
Subject	Other en bioenergetics model Other en Japanese chum salmon Other en size reduction Other en NEMURO Other en global warming NDC 452
Description	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.
Publisher	en Elsevier
Date	Issued2010-07
Language	eng
Resource Type	journal article
Version Type	AM
Identifier	HDL http://hdl.handle.net/2115/43182
Relation	URI http://www.sciencedirect.com/science/journal/09670645 isVersionOf DOI https://doi.org/10.1016/j.dsr2.2009.12.013
Journal	PISSN 0967-0645 en Deep Sea Research Part II: Topical Studies in Oceanography Volume Number57 Issue Number13-14 Page Start1257 Page End1265
File	fulltext Kishi.pdf 517.43 KB (application/pdf) Issued2010-07
Oaidate	2023-07-26