Salmon don’t read memos or get emails from the state Department of Water Resources, nor do they consult U.S. Fish and Wildlife Service instruction manuals. So how can they possibly know when it’s time to spawn?

Over hundreds of thousands of years, salmon have learned to “read” signals that nature provides and only they truly understand. Those signals tell them when it’s time to swim upstream.

A group of FishBio scientists working on the Stanislaus River have crunched 11 years of meticulously kept data to better understand those signals. FishBio concluded that, using “adaptive management” techniques, government regulators often sent the wrong signals. In fact, their efforts were sometimes counterproductive in helping salmon populations recover.
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