To Biologist Yukitaka Kanayama of Tokyo's Hosei University, the shimmering beauty of live rainbow trout is something to stir the scientific imagination. It pained Kanayama to think that most of the rainbow infants raised in Japan's hatcheries are no sooner released in a river than they are gobbled up by bigger fish, including their own elders. He decided to send rainbow babies to survival school.
Aided by a small grant from Japan's Fisheries Resources Conservation Society, he assembled a classroom for baby trout. In the center of a glass tank 10 in. in diameter, he hung a 3...
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