Seasonal changes in habitat use by juvenile coho salmon oncorhynchus kisutch in oregon coastal streams
Nickelson, T.E.; Rodgers, J.D.; Johnson, S.L.; Solazzi, M.F.
Canadian Journal of Fisheries and Aquatic Sciences 49(4): 783-789
Habitat use by juvenile coho salmon (Oncorhynchus kisutch) during spring, summer, and winter was examined in Oregon [USA] coastal streams. Coho salmon fry were most abundant in backwater pools during spring. During summer, juvenile coho salmon were more abundant in pools of all types than they were in glides or riffles. During winter, juvenile coho salmon were most abundant in alcoves and beaver ponds. Because of the apparent strong preference for alcove and beaver pond habitat during winter and the rarity of the habitat in coastal streams, we conclude that if spawning escapement is adequate, the production of wild coho smolts in most coho salmon spawning streams on the Oregon Coast is probably limited by the availability of adequate winter habitat.