Hawaii Longline Seabird Mortality Mitigation Project.

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Citation: McNamara, B., L. Torre and G. Kaaialii, 1999. Hawaii Longline Seabird Mortality Mitigation Project.. US Western Pacific Regional Fishery Management Council, Honolulu.
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Summary:

Dyed bait, alternative offal discards, bird-scaring devices (streamer lines & towed buoys), and night sets reduced seabird (Black-footed (Phobastria nigripes) and Laysan (Phoebastria immutabilis) albatrosses) bycatch in the Hawaiian swordfish and tuna longline fisheries. Alternative offal discards worked by distracting seabirds from hooked bait.

Dyed bait did not affect the catch of target and marketable species (all marlin and tuna species, swordfish, shortbill spearfish, opah, wahoo, and dolphinfish), but it reduced catch of blue sharks.
Field Studies:
Location Fishing gear Reduction technique Bycatch species Effect on bycatch species Catch Effect on target catch Type
Hawaii Hooks-and-Lines Dyed bait Seabirds Reduced bycatch Swordfish and tuna Did not affect target catch In the wild
Hawaii Hooks-and-Lines Alternative offal discharge Seabirds Reduced bycatch Swordfish and tuna In the wild
Hawaii Hooks-and-Lines Bird-scaring devices Seabirds Reduced bycatch Swordfish and tuna In the wild
Hawaii Hooks-and-Lines Night sets Seabirds Reduced bycatch Swordfish and tuna In the wild