Pinniped Predation Report: ESA Winter Steelhead Impacted By Prolonged Steller Sea Lion Presence At Bonneville Dam

teelhead were hit hardest by steller and California sea lions at Bonneville Dam in the fall of 2017 and the spring of 2018. Most of the predation by the pinnipeds at the dam is now by steller sea lions as their numbers have risen in both spring and fall, while the numbers of California sea lions is dropping, according to an annual pinniped predation report by the U.S. Army Corps of Engineers…

 

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