Word: trout
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...managing director of Zagreb-based Sljeme Agricultural Industrial Corp., whose sales last year topped $37 million -a fourteenfold increase in eight years. Sljeme (pronounced Slay-me) now owns four farms stocked with 20,000 head of cattle, 100,000 pigs, 2,000,000 poultry, and ponds full of trout and carp. It employs 3,500 workers and has four large factories that produce everything from semiprepared "TV dinners" to pickled pigs' feet for sale in its 60 food stores, eight restaurants and one hotel. And it makes its deliveries in its own fleet of 150 trucks, manufactures...
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 in. ring of bare wire with six short wires dangling from it. Inside the ring swam a 21-in. "fish" cut from a tin can. The ring and fish were charged with electricity of opposite polarity, thus creating a mild electric field inside the ring...
...train a class so completely that none of them ever risked an electric shock. Then Kanayama held a graduation exercise. He put his pupils in one half of a tank divided by a wire screen through which they could swim easily. On the other side was a grown rainbow trout too big to pass through the screen's meshes. Untutored troutlets wandered guilelessly through the screen and were swallowed by the big fish, but Kanayama's conditioned babies made no such mistake. They associated painful shocks with the tin fish, and they associated the tin fish with...
River Test. Kanayama plans to hold his next test in the Chitose River on Hokkaido Island. He will release educated baby trout, marked so that they can be recognized, in a stretch of water stocked with hungry and cannibalistic grown-up fish. Marked, unschooled babies will be released also. After a suitable interval, the young trout will be netted to see whether the educated ones have survived better than their unshocked cousins...
Kanayama is sure that his pupils will pass the test, and he hopes to build a mass-education plant: a channel with a long series of electrified tin fish. Small trout passing through it will get scare after scare and emerge fully trained for life in a dangerous river. But the biologist is still bothered. Why should successful students grow to bright-colored maturity only to be caught on an angler's hook? "I have become so fond of the lovely rainbow trout," he says with a tender smile, "that I may start another project to teach them...