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Displaying 31 - 40 of 511
| Location | Gear | Catch | Technique | Bycatch species | Type | Results |
|---|---|---|---|---|---|---|
Washington State |
Trout |
Acoustic deterrent devices
|
Pinnipeds | Field study in the wild | Over time, noxious bait, consisting of dead steelhead containing lithium chloride, did not prevent California sea lion (Zalophus californianus) predation of Washington steelhead trout (Salmo gairdneri).
Acoustic harassment devices worked only for a short time in reducing California sea lion depredation before sea lions began to habituate to sounds. Worked temporarily, then habituation occurred |
|
Norway |
Hooks-and-Lines
|
Multiple species |
Sub-surface sets (gillnets)
|
Seabirds | Field study in the wild | Bird-scaring lines and an underwater setting funnel reduced seabird bycatch in longlines off the coast of Norway. Catch of haddock (Melanogrammus aeglefinus), torsk (Brosme brosme), and ling (Molva molva) increased with use of the underwater setting funnel. |
Norway |
Hooks-and-Lines
|
Multiple species |
Bird-scaring devices
|
Seabirds | Field study in the wild | Bird-scaring lines and an underwater setting funnel reduced seabird bycatch in longlines off the coast of Norway. Catch of haddock (Melanogrammus aeglefinus), torsk (Brosme brosme), and ling (Molva molva) increased with use of the underwater setting funnel. |
Hawaii |
Hooks-and-Lines
|
Swordfish |
Dyed bait
|
Seabirds | Field study in the wild | Dyed bait, streamer lines, and weighted bait used in Hawaii longlines each resulted in reduced contact between seabirds (Black-footed (Phobastria nigripes) and Laysan (Phoebastria immutabilis) albatrosses) and bait. Reduced contact with bait |
Hawaii |
Hooks-and-Lines
|
Swordfish |
Bird-scaring devices
|
Seabirds | Field study in the wild | Dyed bait, streamer lines, and weighted bait used in Hawaii longlines each resulted in reduced contact between seabirds (Black-footed (Phobastria nigripes) and Laysan (Phoebastria immutabilis) albatrosses) and bait. Reduced contact with bait |
Hawaii |
Hooks-and-Lines
|
Swordfish |
Sub-surface bait setting
|
Seabirds | Field study in the wild | Dyed bait, streamer lines, and weighted bait used in Hawaii longlines each resulted in reduced contact between seabirds (Black-footed (Phobastria nigripes) and Laysan (Phoebastria immutabilis) albatrosses) and bait. Reduced contact with bait |
Hawaii |
Hooks-and-Lines
|
Swordfish and tuna |
Dyed bait
|
Seabirds | Field study in the wild | 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. |
Hawaii |
Hooks-and-Lines
|
Swordfish and tuna |
Alternative offal discharge
|
Seabirds | Field study in the wild | 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. |
Hawaii |
Hooks-and-Lines
|
Swordfish and tuna |
Bird-scaring devices
|
Seabirds | Field study in the wild | 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. |
Hawaii |
Hooks-and-Lines
|
Swordfish and tuna |
Night sets
|
Seabirds | Field study in the wild | 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. |