Migratory route and scale from Japanese habitats and the distribution of anadromous salmonids in the Pacific region used in the present study.

<p>Chum salmon (blue) have the largest natural range of any Pacific salmon, and undergo the longest migrations within the genus <i>Oncorhynchus</i>. Chum are found around the north Pacific, in the waters of Korea, Japan, and the Okhotsk and Bering seas, British Columbia in Canada, and from Alaska to California in the United States. The native range of pink salmon (green) is from the Arctic and Pacific drainages from Mackenzie River delta, the Northwest Territories, to the Sacramento River drainage, California (occasionally as far south as La Jolla, southern California) and in the west from the Lena River in Siberia to Korea. Populations in Asia occur as far south as Honshu in Japan. Masu (cherry) salmon (red) found in the Western Pacific Ocean along East Asia, range from the Kamchatka, Kuril Islands, Sakhalin and Primorsky Krai south through Korea, Taiwan and Japan.