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Summary: "Total Hg (THg) and methylmercury (MeHg) were examined in muscle and liver samples of salmon species (Chinook: Oncorhynchus tshawytscha; Chum: O. keta; Sockeye: O. nerka; Coho: O. kisutch) and freshwater fish species (Pike: Esox lucius; Grayling: Thymallus arcticus; Whitefish: Caregonus nelsoni) collected in 1999 and 2000 from the Western Alaska rivers (Yukon, Kuskokwim, Nushagak and Kvichak). The THg in salmon muscles has a mean value of 62 ng/g (ww). In Pike muscles, THg has a mean value of 879 ng/g. The mean concentrations of THg in Grayling and Whitefish muscle are 153 ng/g and 32 ng/g respectively. In salmon muscle and liver the MeHg levels constitute 77% and 62% of the THg levels, respectively. In...
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[part of executive summary] Sockeye salmon originating from the Kvichak River watershed historically dominated valuable subsistence, sport and commercial fisheries in Bristol Bay, Alaska. In 1996 salmon runs to western Alaska declined and the Kvichak River sockeye salmon escapement average dropped from 5.7 million fish during 19551995 (range = 0.2 to 24.3 million fish) to an average of 2.1 million fish during 1996−2003 (range = 0.7 to 6.2 million fish). This decline concerned fishers and resource managers and two new escapement monitoring programs were initiated within the Kvichak River watershed to examine status and trends of two important component stocks that spawn in Lake Clark and the Tazimina River. This...


    map background search result map search result map Assessment of total mercury and methyl mercury in selected subsistence fish in Western Alaska Chinook Radio Tracking/Telemetry Pilot Project  Final Report. Prepared on behalf of the North Yukon Renewable Resources Council (RRC) and the Vuntut Gwitchin First Nation Contributions of coded wire tagged Chinook salmon stocks to the early-run marine sport fishery in Cook Inlet, 1999 through 2001 Stock status of coho salmon in upper Cook Inlet: report to the Alaska Board of Fisheries, January 2005 Contributions of coded wire tagged Chinook salmon stocks to the early-run marine sport fishery in Cook Inlet, 1996 through 2002 Consideration of Hatchery Projects as a Means of Mitigating Impacts of Declining Chinook Salmon Runs and Supporting Research Activities in Alaska Seasonal migrations of broad whitefish (Coregonus nasus (Pallas)) in an Arctic lake Population monitoring of Lake Clark and Tazimina River sockeye salmon, Kvichak River watershed, Bristol Bay, Alaska Baseline concentrations of total mercury and methylmercury in salmon returning via the Bering Sea (1999-2000) Contributions of coded wire tagged Chinook salmon stocks to the early-run marine sport fishery in Cook Inlet, 1996 through 2002 Chinook Radio Tracking/Telemetry Pilot Project  Final Report. Prepared on behalf of the North Yukon Renewable Resources Council (RRC) and the Vuntut Gwitchin First Nation Population monitoring of Lake Clark and Tazimina River sockeye salmon, Kvichak River watershed, Bristol Bay, Alaska Contributions of coded wire tagged Chinook salmon stocks to the early-run marine sport fishery in Cook Inlet, 1999 through 2001 Stock status of coho salmon in upper Cook Inlet: report to the Alaska Board of Fisheries, January 2005 Consideration of Hatchery Projects as a Means of Mitigating Impacts of Declining Chinook Salmon Runs and Supporting Research Activities in Alaska Baseline concentrations of total mercury and methylmercury in salmon returning via the Bering Sea (1999-2000) Assessment of total mercury and methyl mercury in selected subsistence fish in Western Alaska Seasonal migrations of broad whitefish (Coregonus nasus (Pallas)) in an Arctic lake