Researchers: Columbia spring chinook forecast might be too high

Fisheries managers have been predicting a slightly below-average run of spring chinook salmon on the Columbia River this year, but a newly published 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. The lack of food for the salmon in 2015 may have resulted in significant mortality that will show in this year’s run of Columbia River springers. One way or another, it will provide new information on fish survival and whether juvenile salmon prey data can help resource managers predict future returns. continue reading the story here 10:11

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