Originally Posted By: eyeFISH
The Cathlamet pound net (fish trap) project is the modern-day model for deploying this uber-selective gear type.

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Final 2017 report....

A total of 7,129 salmon and steelhead were caught; about 2,000 Chinook and 1,000 steelhead were tagged. The Wild Fish Conservancy’s very preliminary analysis of [B]post-release survival of the tagged fish to McNary Dam was 99.6 percent for Chinook and 94 percent




As is, the researchers must have made some assumptions or some complex calculations to differentiate survival from the loss due to predation, harvest or turn off for those tagged fish that weren't destined for McNary Dam . These were the types of things that made the earlier study about release survival rates so difficult to sort out.

Numbers seem too good for handling fish in the lower Columbia during warm water.