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    Effects of elevated sediment levels from placer mining on survival and behavior of immature arctic grayling

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    Scannell_O_1988.pdf
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    Author
    Scannell, Patrick O.
    Keyword
    arctic grayling
    fishes
    Alaska
    hydraulic mining
    environmental impact
    Metadata
    Show full item record
    URI
    http://hdl.handle.net/11122/11465
    Abstract
    The effect of placer mining effluents on Arctic grayling (Thymallus arcticus) fingerling and egg survival was tested in mined and unmined streams in interior Alaska. Also the influence of turbidity on Arctic grayling reactive distance and avoidance behavior was tested in a laboratory choice chamber. Arctic grayling fingerlings suffered less than 1% mortality during a 96-hr toxicity test in both clear (mean NTU = 1.4) and mined (mean NTU = 445) streams. Arctic grayling eggs did not show significantly (p > 0.1) higher mortality in mined streams than in unmined streams. In a laboratory choice chamber test, Arctic grayling avoided water with a turbidity above 20 NTU (nephelometric turbidity units). Arctic grayling reactive distance diminished proportional to the natural logarithm of turbidity.
    Description
    Thesis (M.S.) University of Alaska Fairbanks, 1988
    Date
    1988-12
    Type
    Thesis
    Collections
    Fisheries
    Theses supervised by AKCFWRU

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