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Publication Information

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Title: Coho Salmon populations in the Karst landscape of north Prince of Wales Island, southeast Alaska.

Author: Bryant, M.D.; Swanston, D.N.;

Date: 1998

Source: American Fisheries Society. 127: 425-433.

Publication Series: Miscellaneous Publication

Description: Karst topography is a unique and distinct landscape and its geology may have important implications for salmon productivity in streams. The relationship between salmonid communities and water chemistry and the influence of habitat was examined in a set of streams on north Prince of Wales Island, southeast Alaska. Streams in karst landscapes showed higher alkalinities (1,500-2,300 µeq/L) than streams not influenced by karst landscapes (750-770 µeq/L). A significant, positive relationship was observed between alkalinity and density of coho salmon parr Oncorhynchus kitsutch. Backwater pools supported higher densities of coho salmon than did other habitat units. Both coho salmon fry and parr tended to be larger in most karst-influenced streams than in nonkarst streams. Although past timber harvest practices in the riparian areas of several of the streams appeared to influence stream habitat and water temperature, streams flowing through karst landscapes had a distinct water chemistry. Furthermore, these streams appeared to support more fish than nonkarst streams.

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Bryant, M.D.; Swanston, D.N. 1998. Coho Salmon populations in the Karst landscape of north Prince of Wales Island, southeast Alaska. American Fisheries Society. 127: 425-433.

 


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