A Genetic Mystery: UI Zooligist's DNA Testing of Columbia River Fall Chinook Salmon Reveals Females' Apparent Sex Shift

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University of Idaho zoologist James J. Nagler processes samples from chinook salmon carcasses along the shoreline of the Columbia River’s Hanford Reach. Nagler clipped a piece of fin from each carcass for DNA analysis. He took samples in November 1999 and again this fall.

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James J. Nagler, left, a University of Idaho zoologist, and Kurt Hubbard, a Pacific States Marine Fisheries Council scientific technician, search the shoreline of the Columbia Riveršs Hanford Reach for spawned-out salmon carcasses. Hubbard is part of a crew that monitors chinook spawning in the reach, the stronghold of wild fall chinook in the Columbia above Bonneville Dam.

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Jay McCue pilots a jetboat along the Columbia River’s Hanford Reach as part of a Pacific States Marine Fisheries Council survey of spawning fall chinook salmon there. With him on the boat are Kurt Hubbard of the PSFMC and James J. Nagler, a University of Idaho zoologist.

Photos by University of Idaho/Bill Loftus


Chinook Salmon Photo Courtesy of Pacific Northwest National Laboratory.
All Other Materials Copyright © 2000, University of Idaho.