1. D. Ando, and Y. Miyakoshi .2003 .Estimates of catch numbers by recreational fishing for masu salmon smolts stocked in the lower area of a river., Scientific Reports of the Hokkaido Fish Hatchery, 57 :49 –53 .(In Japanese, English summary.).
2. Seasonal Distribution of Yearling Masu Salmon Released from the Sea of Japan Side of Southwestern Hokkaido, Japan
3. M. Ban, N. Kasahara, and K. Yamauchi .1987 .Physiological changes in the hatchery-reared yearling masu salmon (Oncorhynchus masou) during smoltification., Scientific Reports of the Hokkaido Fish Hatchery, 42 :27 –35 .(In Japanese, English summary.).
4. K. Chida, and A. Kijima .1994 .Colorimetric measurement of the masu salmon for smoltification., Fish Genetics and Breeding Science, 20 :55 –61 .(In Japanese).
5. Plasma thyroid hormones during smoltification of yearling and underyearling coho salmon and yearling chinook salmon and steelhead trout