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Effectiveness of selected stream improvement techniques to create suitable summer and winter rearing habitat for juvenile coho salmon oncorhynchus kisutch in oregon coastal streams


Effectiveness of selected stream improvement techniques to create suitable summer and winter rearing habitat for juvenile coho salmon oncorhynchus kisutch in oregon coastal streams



Canadian Journal of Fisheries and Aquatic Sciences 49(4): 790-794



ISSN/ISBN: 0706-652X

DOI: 10.1139/f92-089

We examined the use of constructed pools by juvenile coho salmon (Oncorhynchus kisutch) during summer and winter. Log, gabion, and rock structures placed across the full stream width provided good summer habitat but poor winter habitat for juvenile coho salmon. Rearing densities in constructed habitats during summer and winter were generally similar to those in natural habitats of the same type, except that constructed dammed pools supported lower densities during winter than natural dammed pools. The addition of brush bundles to pools created by full-stream-width structures increased the density of juvenile coho salmon in dammed pools during winter, but not in plunge pools. We conclude that the development of off-channel habitat has the greatest potential to increase production of wild coho salmon smolts in Oregon coastal streams.

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Accession: 007265920

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