Monday, January 11, 2010

Coho in the Upper Columbia

Recovery efforts are underway to reintroduce long extirpated Coho to the Upper Columbia. By the end of the 20th century dams, habitat destruction and overharvest had driven Coho to extinction in the Upper Columbia forcing managers to use Lower Columbia hatchery stock to reestablish runs on the Upper Columbia. In the last decade returns of hatchery fish to the Upper Columbia have increased dramatically raising hopes that abundant hatchery fish may eventually be able to establish naturally producing, locally adapted stocks. Managers hope to discontinue hatchery supplementation once subbasins reach about 1,500 natural spawners and they believe they are on track to meet that goal around 2026. More information on the coho reintroduction effort in the Columbia Basin Bulletin:

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