Study Looks At Salmon Mortality By Seabirds, Ties Size Of Columbia River Plume To Predator-Prey

As juvenile salmon and steelhead enter the ocean, the common murre and sooty shearwater, offshore avian predators that feed on forage fish such as salmon, throw up a “predator gauntlet” while the fish are still in the Columbia River plume, according to a recent study.

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