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Why fish that live in cold water need warm water, too

Redband rainbow trout
U.S. Geological Survey
New research about water temperature needs for traveling fish.

The cold-water fish are the ones that get a lot of attention in our region. Because salmon and trout and other cold-water species can tell us a lot about the overall health of ecosystems in both saltwater and freshwater.

Now comes research that shows scientists should not overlook warmer bodies of water, because these can be places where the traveling fish can rest up and fatten up before expending energy in their trips in cold streams.

Jonathan Armstrong and Nick Hahlbeck at Oregon State University are among several authors on the recent paper outlining the research; they visit with details of the work and the findings.

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The Jefferson Exchange is Jefferson Public Radio's daily news program focused on issues, people and events across Southern Oregon and Northern California. Angela Decker is the program's senior producer, Charlie Zimmermann is the assistant producer, and Geoffrey Riley hosts the show.