“As soon as that juvenile gets eaten by a predator, another fish that’s bigger in the stream, it changes its ping and that ping basically says, ‘Oh, I got eaten.’ ” Scientists can track how well the salmon do in certain places and, by extension, what kinds of habitats help or hurt, and more about the salmon predators. The science involves putting acoustic tags in eight-centimetre long juvenile salmon that emit a ping only the microphones, or hydrophones, placed in rivers can catch. To improve those chances, Neff and other researchers are engaged in some tiny science that got a big boost from the federal government Thursday. In any particular river you might get 10,” said Western University biologist Bryan Neff. “Returning adults you can count on two hands. Of the million Atlantic salmon released into streams every spring, at most a few thousand make it through the first two years of life and get into Lake Ontario, and much fewer than that survive the lake and come back upriver to spawn. You think some of your goals are a long shot.įor the Atlantic salmon, and the millions of dollars and health of the lake riding on its back, survival is the long shot. Manage Print Subscription / Tax Receipt.
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