Graduate Thesis Or Dissertation
 

Population structure of coastal cutthroat trout (Oncorhynchus clarki clarki) in the Muck Creek Basin, Washington

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https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/2801pk97t

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  • The relationship of coastal cutthroat trout (Oncorhynchus clarki clarki) populations in the Muck Creek basin, a 238 km² southern Puget Sound stream basin in western Washington, was examined using starch gel electrophoresis and meristic analysis. Coastal cutthroat trout were collected from six sites throughout the basin including tributaries, portions of the mainstem, and a lake. Four sites contained only resident trout, the lower mainstem contained resident and anadromous trout, and the lake contained only mature anadromous trout based on size and appearance. Patterns of allelic and meristic variation suggest a significant structuring and separation of coastal cutthroat trout populations in the basin. The lake population was distinguished from the other populations by significant differences in allele frequencies and meristic characters. The other sites grouped more closely together with significant variation among and between sites meristically and at several loci.
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