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    Spawning substrate and adequate escapement for coho salmon in the Ayakulik river, Kodiak National Wildlife Refuge, Alaska

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    Author
    Hander, Raymond F.
    Keyword
    Coho salmon
    Ayakulik River
    Spawning
    Fishery management
    Metadata
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    URI
    http://hdl.handle.net/11122/14757
    Abstract
    Escapement information for management of coho salmon, (Oncorhynchus kisutch), is lacking in some drainages on Kodiak National Wildlife Refuge. In 1993 and 1994,1 assessed availability of spawning substrate for coho salmon in the Ayakulik River, a major drainage of the Refuge, as a potential cost-effective method for setting escapement goals. Spawning substrate was divided into three categories: optimal, suboptimal and marginally usable. I conducted a foot survey to count coho salmon spawners in 10 river sections during late October 1994 in three of four strata comprising the Ayakulik River. I found a significant relationship between numbers of spawners and availability of optimal substrate in two of the strata combined (r2=0.28, p=0.04); with optimal and suboptimal substrate combined the significance increased (r2=0.39, p=0.01). When I pooled optimal, suboptimal, and marginally usable substrate I found no significant relationship (r2=0.21, p=0.08). Adequate escapement of coho salmon may be predicted by the amount of optimal and suboptimal substrate available.
    Description
    Thesis (M.S.) University of Alaska Fairbanks, 1997
    Date
    1997-05
    Type
    Thesis
    Collections
    Theses supervised by AKCFWRU
    Fisheries

    entitlement

     
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