Study:2017 Spring Chinook Return Numbers Will Reflect Ocean Food Shortage Faced By Juveniles In 2015

The Columbia Basin Bulletin –

Fisheries managers have been predicting a slightly below-average run of spring chinook salmon on the Columbia River this year but a newly published study suggests that it may be worse.

According to researchers from Oregon State University and the National Oceanic and Atmospheric Administration, ocean conditions were historically bad in the spring of 2015, when migrating yearling fish that will comprise the bulk of this spring’s adult chinook salmon run first went out to sea.

In fact, Pacific Decadal Oscillation values – which reflect warm and cold sea surface temperatures – suggest it was one of the warmest nearshore oceans encountered by migrating chinook salmon dating back to at least 1900.

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