American Fisheries Society
Professional society for fisheries scientists. Goal is to promote the conservation, development and wise use of the fisheries.
http://www.fisheries.org/
Fisheries Society of the British Isles
Organization of professional fish biologists and fisheries managers in the British Isles and Europe.
http://www.le.ac.uk/biology/fsbi/
Gulf and Caribbean Fisheries Institute
GCFI is a not-for-profit organization that promotes the exchange of information on the use and management of marine resources in the Gulf and Caribbean region.
http://www.gcfi.org/
Marine Conservation Alliance
Promotes the sustainable use of North Pacific marine resources. Site includes information on fisheries management topics and issues in the region.
http://www.marineconservationalliance.org
Trout Unlimited
Private, non-profit organization whose mission is to conserve, protect and restore North America's trout and salmon fisheries and their watersheds. Includes information on fisheries management topics.
http://www.tu.org/