effects of permethrin on aquatic organisms in a freshwater stream in south-central alaska.permethrin (0.5%) was applied to individual lutz spruce, picea x lutzii little, to protect them from attack by spruce beetles, dendroctonus rufipennis (kirby). residue levels were monitored in a freshwater stream above, adjacent to, and below the treatment site at intervals before, during, and after treatment. maximum residue levels in the stream within the treatment site ranged from 0.05 +/- 0.01 ppb 5 h after treatment to 0.14 +/- 0.03 ppb 8-11 h after treatment, with a decrease to 0.02 +/- 0. ...19921619107
interspecific and intraspecific variation in selenium:mercury molar ratios in saltwater fish from the aleutians: potential protection on mercury toxicity by selenium.a number of factors affect the consumption risk from mercury in fish, including mercury levels, seasonal patterns of mercury concentrations, human consumption patterns, and sensitive populations (e.g. pregnant women, fetuses, young children, and yet unknown genetic factors). recently the protective effects of selenium on methylmercury toxicity have been publicized, particularly for saltwater fish. we examine levels of mercury and selenium in several species of fish and seabirds from the aleutian ...201222664537
the utilization of a pacific salmon oncorhynchus nerka subsidy by three populations of charr salvelinus spp.the l(f) -at-age trajectories differentiated two populations of dolly varden charr salvelinus malma and a population of arctic charr salvelinus alpinus from the eastern end of iliamna lake, alaska. salvelinus malma from the pedro bay ponds were the smallest for a given age, followed by salvelinus alpinus from the lake, and s. malma from the iliamna river were much larger. the utilization of a large sockeye salmon oncorhynchus nerka subsidy by the three salvelinus spp. populations was then invest ...201020840627
a biomonitoring plan for assessing potential radionuclide exposure using amchitka island in the aleutian chain of alaska as a case study.with the ending of the cold war, the us and other nations were faced with a legacy of nuclear wastes. for some sites where hazardous nuclear wastes will remain in place, methods must be developed to protect human health and the environment. biomonitoring is one method of assessing the status and trends of potential radionuclide exposure from nuclear waste sites, and of providing the public with early warning of any potential harmful exposure. amchitka island (51 degrees n lat, 179 degrees e long ...200717683832
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