North Pacific Anadromous Fish Commission

Technical Report 11

Table of Contents

Global Warming Effect for Migration Route of Japanese Chum Salmon

Authors:
Masahide Kaeriyama and Yusuke Urabe

Abstract Excerpt:
Since the late 1990s, population size and survival of Japanese chum salmon (Oncorhynchus keta) have indicated a decreasing trend. Especially the population size of salmon returning to Hokkaido in 2016 and 2017, which were the minimum levels since 1990. However, it was predicted in the early 2000s that their population size in 2010 might become half of the maximum because of the new climate regime-shift since the end of the last century (Kaeriyama 2004, Kaeriyama et al. 2014). We also predicted the potential marine distribution of chum salmon in the North Pacific Ocean, the Bering Sea and the Chukchi Sea based on the SRES-A1B scenario in the Fourth Assessment Report of the IPCC (Kaeriyama 2008): 1) a northward shift in the distribution of chum salmon to the Chukchi Sea, and 2) loss of their migration route connecting Hokkaido with the Okhotsk Sea due to a thermal impediment.

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DOI:
https://doi.org/10.23849/npafctr11/91.95

Citation

Kaeriyama, M., and Y. Urabe.  2018.  Global warming effect for migration route of Japanese chum salmon.  N. Pac. Anadr. Fish Comm. Tech. Rep. 11: 91–95.  https://doi.org/10.23849/npafctr11/91.95