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An evaluation of fall chum salmon mark rates upriver of the Rampart mark-recapture tagging site, Yukon River, Alaska, 2003

Dates

Year
2004

Citation

Bromaghin, Jeffrey F., Underwood, Tevis J., Hander, Raymond F., and Hander, Raymond F., 2004, An evaluation of fall chum salmon mark rates upriver of the Rampart mark-recapture tagging site, Yukon River, Alaska, 2003: Region 7, U.S. Fish and Wildlife Service, Dept. of the Interior: Anchorage.

Summary

Mark rates of fish collected from 3 tributary rivers (Chandalar River, Sheenjek River, and Fishing Branch River) and from the Yukon River near the international border were compared with the mark rate observed at the mark-recapture site on the Yukon main stem downriver near Rampart, Alaska. The hypothesis that mark rates in the gill net and fish wheel catches were equal was tested. A delayed and progressive mortality remains the single potential cause for declining mark rates upriver.

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