A Caspian tern snatches a salmon fingerling from the waters of Youngs Bay in 2010. Some researchers believe that terns are a major source of salmon depletion in local waters.
A Caspian tern snatches a salmon fingerling from the waters of Youngs Bay in 2010. Some researchers believe that terns are a major source of salmon depletion in local waters.
CORVALLIS — Caspian terns feeding on young fish have a significant impact on runs of steelhead in the Columbia River, according to a new paper from scientists at Oregon State University.
Through detailed analysis of steelhead survival and Caspian tern predation rates, the researchers found that the birds are not only preying on fish that would perish for some other reason, but are adding to the annual death toll by eating steelhead smolts that would have survived without tern pressure.
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Keep it Clean. Please avoid obscene, vulgar, lewd, racist or sexually-oriented language.
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