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    Relationships between brown bears and chum salmon at McNeil River, Alaska

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    Peirce_J_2007.pdf
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    Author
    Peirce, Joshua McAllister
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    URI
    http://hdl.handle.net/11122/5618
    Abstract
    Since 1967, the McNeil River State Game Sanctuary (MRSGS) has been managed by the Alaska Department of Fish and Game to 'provide permanent protection for brown bears'. Up to 144 bears have been identified in a summer at MRSGS, and 72 bears at once have been observed in the vicinity of McNeil Falls. In this study, 155 chum salmon were radio tagged as they entered McNeil River and monitored daily. In 2005 and 2006 bears killed 48% of pre-spawning tagged chum salmon and consumed 99% of all tagged chums below McNeil Falls where most of the run occurs. A retrospective analysis of 31 years of run data using a new stream life, and a correction for observer efficiency, revealed that the current escapement goal of 13,750-25,750 actually represents 34,375-64,375 chum salmon. Considering the large removal of pre-spawning chum salmon, I recommend an additional 23,000 chum salmon be added to the escapement goal. Additionally, an annual escapement of 4,000-6,000 chum salmon above McNeil Falls should be set as an objective. These recommendations should encourage increased chum salmon returns, providing both food for McNeil bears, as well as benefiting the commercial fishery with increased harvest opportunities.
    Description
    Thesis (M.S.) University of Alaska Fairbanks, 2007
    Table of Contents
    Stream life of chum salmon and a retrospective analysis of escapement at McNeil River, Alaska -- Management of chum salmon for brown bears and other fish and wildlife at McNeil River, Alaska.
    Date
    2007-08
    Type
    Thesis
    Collections
    Biological Sciences
    Theses supervised by AKCFWRU

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