Study: Environmental DNA Could Help With Accuracy Of Matching Salmonid Species With Redds

Counting redds, the nests prepared by female salmon and steelhead, is a way for biologists to measure the status and trends of fish. However, other than timing, depth, water velocity and a few other physical signs, determining the type of nest – coho or chinook, for example – is less certain and error rates of redd counts based on these physical characteristics can be as high as 34 percent, according to a recent study.

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