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    Winter habitat of arctic grayling in an interior Alaska stream

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    Lubinski_B_1995.pdf
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    Author
    Lubinski, Brian R.
    Keyword
    Arctic grayling
    Alaska
    Fishes
    Wintering
    Habitat
    Metadata
    Show full item record
    URI
    http://hdl.handle.net/11122/8436
    Abstract
    Placer mining and the lack of information on winter ecology of Arctic grayling Thymallus arcticus. has raised concern for this popular sportfish. A study was designed to validate aerial radio telemetry data and to locate and describe overwinter areas (OWA) of Arctic grayling in Beaver Creek, Alaska. Reliance on aerial data alone resulted in overestimation of survival and misidentification of 14 of 26 designated OWAs. Twenty-one Arctic grayling were tracked downstream 12-58 km to 12 OWAs spanning a 31-km section of Beaver Creek. Radio-tagged and untagged Arctic grayling occupied areas with ice thickness of 0.4-1.4 m overlying 0.06-0.52 m of water, flowing at 0.03-0.56 m/s. During winter, discharge, cross-sectional area, velocities, and water width in four OWAs decreased until late March; then, cross-sectional area increased due to an increase in discharge that pushed the ice upward. Adult Arctic grayling overwintered downstream of habitat disturbances, and occupied much shallower winter habitats than expected.
    Description
    Thesis (M.S.) University of Alaska Fairbanks, 1995
    Date
    1995-05
    Type
    Thesis
    Collections
    Older Theses Not Clearly Affiliated with a Current College
    Theses supervised by AKCFWRU

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