Transmitters to track trout behavior

The Yomiuri Shimbun Ultrasonic transmitters will be attached to kunimasu trout in Saiko lake in Yamanashi Prefecture, as part of a project started in mid-April by the Yamanashi Prefectural Fisheries Technology Center to track their behavior. Kunimasu, a species indigenous to Tazawako lake in Akita Prefecture, were confirmed to exist in Saiko in 2010. They were previously believed to have gone extinct around 1940, and have attracted attention...