Abstract
Abstract In June 1968, juvenile chinook salmon from Little White Salmon National Fish Hatchery, Washington, were marked by freeze branding and released at six different locations in the Columbia River downstream from the hatchery. Marked fish were sampled in the estuary to compare survival of the different groups. Survival was more than doubled by transporting the fish to a point below Bonneville Dam (40 km downstream from Little White Salmon Hatchery) but was not appreciably increased by transporting them farther downstream.
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