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    Author(s): Bret C. HarveyRodney J. NakamotoJason L. White
    Date: 1999
    Source: Canadian Journal of Fisheries and Aquatic Sciences 56(11): 2161-2166.
    Publication Series: Miscellaneous Publication
    PDF: View PDF  (82 KB)


    Abstract - To improve understanding of the significance of large woody debris to stream fishes, we examined the influence of woody debris on fall and winter movement by adult coastal cutthroat trout (Oncorhynchus clarki) using radiotelemetry. Fish captured in stream pools containing large woody debris moved less than fish captured in pools lacking large woody debris or other cover. Fish from pools lacking cover commonly moved to habitats with large boulders or brush, particularly during the day. Movements by fish over 1-day periods were strongly influenced by large woody debris or other elements providing cover. Fish initially found in habitats lacking large woody debris, large boulders, or brush cover moved the most extensively, while fish initially found in pools with large woody debris moved the least. Fish did not move extensively in response to a bankfull flood, although some moved to habitat downstream of large woody debris in tributaries or secondary channels.

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    Harvey, Bret C.; Nakamoto, Rodney J.; White, Jason L. 1999. The influence of large woody debris and a bankfull flood on movement of adult resident coastal cutthroat trout (Oncorhynchus clarki) during fall and winter. Canadian Journal of Fisheries and Aquatic Sciences 56(11): 2161-2166.


    PSW4351, Oncorhynchus clarki, radiotelemetry, woody debris, stream fish, pools

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