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Languages : en
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The Geophysical Institute at the University of Alaska Fairbanks offers the full text of the October 22, 1999 article entitled "Mercury Found in Fish of Southwest Alaska," written by Ned Rozell. The university presents the article as part of the Alaska Science Forum. Fish in southwest Alaska have been found to contain high levels of mercury. Fish eat plankton and algae, which ingest mercury from the air or minerals in the water.
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Languages : en
Pages :
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The Geophysical Institute at the University of Alaska Fairbanks offers the full text of the October 22, 1999 article entitled "Mercury Found in Fish of Southwest Alaska," written by Ned Rozell. The university presents the article as part of the Alaska Science Forum. Fish in southwest Alaska have been found to contain high levels of mercury. Fish eat plankton and algae, which ingest mercury from the air or minerals in the water.
Author: Xiaoming Zhang
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Category : Fishes
Languages : en
Pages : 236
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"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 Pike muscle the MeHg levels constitute 100% of the THg levels. A significant correlation between Hg levels and fish length was found. Calculated consumption limits indicate that children may consume 0.05-1.5 kg of fish per month, depending on the species consumed. The study suggests that, from 1979 to 1998, nearly 21 kg of MeHg was transported by Sockeye salmon to the Alaskan rivers of the Bering Sea east coast"--Leaf 3.
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Category : Geology
Languages : en
Pages : 580
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Author:
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Category : Geology
Languages : en
Pages : 176
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Author: John E. Gray
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Category : Metals
Languages : en
Pages : 48
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Short articles summarize environmental geochemical studies of metallic mineral deposits in Alaska, including massive sulfide, gold, mercury, chromium, and uranium mines and deposits. The studies report metal and acid concentrations in samples collected around such mines and deposits, and evaluate environmental effects of the deposits. The articles are written in a style intended to reach a general audience.
Author: United States. Congress. Senate. Committee on Commerce. Subcommittee on Oceans and Atmosphere
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Category : Fishes
Languages : en
Pages : 74
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Author:
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Category : Geology
Languages : en
Pages : 340
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Author:
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Category :
Languages : en
Pages : 296
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Author:
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Category : Geology
Languages : en
Pages : 340
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Author: Norman John Silberling
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Category : Animals, Fossil
Languages : en
Pages : 294
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