Early-arriving endangered Chinook salmon take the brunt of sea lion predation

The Columbia River is home to one of the West Coast's most important Chinook salmon runs. Through late spring and early summer, mature fish return from the sea and begin their arduous journey upriver to spawn. In recent years, these fish have faced an additional challenge: hungry California sea lions.

from Phys.org - latest science and technology news stories https://ift.tt/3j5ju2M

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