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The influence of large woody debris on retention, immigration, and growth of coastal cutthroat trout (Oncorhynchus clarki clarki) in stream poolsAuthor(s): Bret C. Harvey
Source: Canadian Journal of Fisheries and Aquatic Sciences 55(8): 1902-1908.
Publication Series: Miscellaneous Publication
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DescriptionAbstract - Over 4 months and about 1 year, coastal cutthroat trout (Oncorhynchus clarki clarki) ≥age-1 in Little Jones Creek, California, remained at similar rates in pools with and without large woody debris. This result was based on attempts in July and November 1995 to collect and tag all fish in 22 pools and three collections of fish from the same pools in November 1995, May 1996, and August 1996. Retention of fish appeared to be greater in pools with large woody debris in May 1996. The presence of large woody debris in pools did not influence immigration or growth of cutthroat trout. However, both immigration and growth increased downstream over the 3850-m study reach. Low retention and substantial immigration of cutthroat trout into experimental pools indicate that movement is important in the dynamics of this population. First- and second-order channels appear to be important sources of fish for the third-order study reach, while the study reach may export significant numbers of fish to downstream reaches accessible to anadromous fish.
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CitationHarvey, Bret C. 1998. The influence of large woody debris on retention, immigration, and growth of coastal cutthroat trout (Oncorhynchus clarki clarki) in stream pools. Canadian Journal of Fisheries and Aquatic Sciences 55(8): 1902-1908.
KeywordsPSW4351, cutthroat trout, California, fish, woody debris, stream fish, habitat quality
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