Evaluate Selective Fishing in the Willapa River, a Pacific Northwest Estuary

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Washington Department of Fish and Wildlife, Fish Program, Science Division, 2007 - Bycatches (Fisheries) - 67 pages
Selective fishing is defined as the ability of a fishing operation to avoid non-target species and stocks, or when encountered, to capture and release them in a manner that minimizes mortality. Commercial and sport gears were tested in an estuary environment to selectively harvest adult hatchery coho (Oncorhynchus kisutch) and release natural coho and fall Chinook salmon (O. tshawytscha) bycatch. Experienced commercial fishers fished tangle nets (8.9 cm (3.5') mesh size, multifilament net) and gill nets (14.6 cm (5.75') mesh size, monofilament net) suitable for a coho fishery. To minimize mortality as much as possible, fishers also used careful handling techniques, a revival box, a shorter net, and shorter soak times. During the same time period, experienced sport fishers fished using barbless hooks and herring. Live fish were tagged and released for recovery in sport fisheries, commercial fisheries, at hatchery racks, and during spawning ground surveys.

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Contents

Approach f? L 1 l qlil n 1 l7 l Libraries
9
Fmdrngs
20
Evaluation
45

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