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Found these nets on a dock while boating in Alaska.
Gillnetting is a common fishing method used by commercial and artisanal fishermen of all the oceans and in some freshwater and estuary areas. �Gill nets are vertical panels of netting normally set in a straight line. Fish may be caught by gill nets in 3 ways : (1) wedged � held by the mesh around the body (2) gilled � held by mesh slipping behind the opercula, or (3) tangled � held by teeth, spines, maxillaries, or other protrusions without the body penetrating the mesh. Most often fish are gilled. A fish swims into a net and passes only part way through the mesh. When it struggles to free itself, the twine slips behind the gill cover and prevents escape.
Gillnets are so effective that their use is closely monitored and regulated by fisheries management and enforcement agencies. Mesh size, twine strength, as well as net length and depth are all closely regulated to reduce bycatch of non-target species. Gillnets have a high degree of size selectivity Most salmon fisheries in particular have an extremely low incidence of catching non-target species
January 29th, 2013
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