[Press Release] Winter aggregation of nonnative rainbow trout in small tributaries: implications for effective control

A research team of Assoc. Prof. Itsuro Koizumi and his graduate students (Division of Biosphere Science) revealed that rainbow trout, one of “100 of the World’s Worst Invasive Alien Species”, immigrated to and extremely aggregated in small tributaries of the Otofuke River, central Hokkaido during the winter. This study has an important implication for effective control of this invasive fish and helps to understand a mechanism of adaptation to a new environment. This research outcome is published in Ichthyological Research, an academic journal of the Ichthyological Society of Japan.

Please visit links below to view the press release (Japanese version only).
Research Press Release (PDF)