Researchers Survey Studies Of Avian Predation Of Columbia River Salmon, Steelhead; Identify Trends, Predator-Prey Dynamics, Fish Susceptibility Factors

The breeding season for avian predators, March–August, overlaps with the peak out-migration of juvenile salmon and steelhead, April — August, according to a recent survey of literature that looked specifically at peer-reviewed studies of Caspian terns, double-crested cormorants and gulls that prey on salmonids in the Columbia River basin.

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