2007 年 55 巻 4 号 p. 651-652
In June 2006, we found Predation on native lamprey species by a large, nonnative brown trout (600 mm in fork length) in a small stream in Hokkaido, Japan. The trout ate 15 adult lampreys and one unidenti-fied fish. Brown trout may cause decline of endangered native lamprey species.