Regional synchrony in return rates of chum salmon (Oncorhynchus keta) in Japan in relation to coastal temperature and size at release

Publication year: 2009
Source: Fisheries Research, Volume 95, Issue 1, 1 January 2009, Pages 14-27</br>
Toshihiko, Saito , Kazuya, Nagasawa</br>
In Japan, the population of chum salmon (Oncorhynchus keta) has been sustained for over 30 years by artificial propagation. Annual chum salmon releases have remained approximately constant since the early 1980s while the number of adult returns has varied greatly among regions. To better understand this variability and its cause, we compared return rates for 19761998 brood-year chum salmon among seven regions of Japan. Synchronous changes in the return rates were found in each of the two coupled regions: Okhotsk and Nemuro (OHNE) regions, and West Hokkaido Pacific and Honshu Pacific (WPHP) regions. As each pair of regions is geographically...</br>

11th August 2010 12:14

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