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Displaying 51 - 60 of 561
Location Gear Catch Technique Bycatch species Type Results

Gulf of Maine

Dredge
Scallop
Excluder devices
Sea Turtles Field study in the wild
Summary: A chain mat placed on Northwest Atlantic dredge gear eliminated bycatch of sea turtles: loggerhead (Caretta caretta), leatherback (Dermocheles coriacea), and green sea turtles (Chelonia mydas). The chain mat reduced catch by 6.71%.
Effect on Bycatch: Eliminated bycatch
Reference:
DuPaul, W.D., D.B. Rudders, and R.J. Smolowitz, 2004 , Industry trials of a modified sea scallop dredge to minimize the catch of sea turtles

Florida

Hooks-and-Lines
King mackerel
Quick-release gear
Small Cetaceans (maximum length < 7.5 meters) Field study in the wild
Summary: A quick-release metal wire added to the Florida king mackerel troll fishery reduced depredation of catch by bottlenose dolphin (Tursiops truncatus). There was no impact on king mackerel catch.
Effect on Bycatch: Reduced depredation
Reference:
Zollett, E.A. and A.J. Read, 2006 , Depredation of catch by bottlenose dolphins (Tursiops truncatus) in the Florida king mackerel (Scomberomorus cavalla) troll fishery

Flume tank

Trawls
Scallop
Excluder devices
Pinnipeds Field study in the wild
Summary: An excluder device, tested on a trawl net in a flume tank with dummy seals in New Zealand excluded dummy seals from the codend of the net. The modifications were trialed to address bycatch of Hookers sea lions and New Zealand fur seals.
Effect on Bycatch: Excluded experimental dummy seals
Reference:
Gibson, D. and B. Isakssen, 1998 , Functionality of a full-sized marine mammal exclusion device

United Kingdom

Trawls
Bass
Excluder devices
Small Cetaceans (maximum length < 7.5 meters) Field study in the wild
Summary: An excluder device, tested in the United Kingdom bass pair trawl fishery, reduced bycatch of common dolphins (Delphinus delphis). There was a negligible loss of target fish (<1%).
Effect on Bycatch: Reduced bycatch
Reference:
Northridge, S., 2003 , Further development of a dolphin exclusion device

Hawaii

Hooks-and-Lines
Swordfish and tuna
Sub-surface sets (gillnets)
Seabirds Field study in the wild
Summary: Underwater setting chutes, blue-dyed bait, and side-sets each reduced the bycatch of seabirds (Laysan and black-footed albatross and short-tailed shearwater) in the Hawaiian longline tuna and swordfish fisheries. Side-sets showed the most promise for a bycatch mitigation technique while blue-dyed bait was the least effective at reducing seabird bycatch and shows the least promise of these methods as an effective bycatch mitigation strategy.
Effect on Bycatch: Reduced bycatch
Reference:
Gilman, E., N. Brothers, and D. Kobayashi, 2003 , Performance Assessment of Underwater Setting Chutes, Side-Setting, and Blue-Dyed Bait to Minimize Seabird Mortality in Hawaii Pelagic Longline Tuna and Swordfish Fisheries

Hawaii

Hooks-and-Lines
Swordfish and tuna
Dyed bait
Seabirds Field study in the wild
Summary: Underwater setting chutes, blue-dyed bait, and side-sets each reduced the bycatch of seabirds (Laysan and black-footed albatross and short-tailed shearwater) in the Hawaiian longline tuna and swordfish fisheries. Side-sets showed the most promise for a bycatch mitigation technique while blue-dyed bait was the least effective at reducing seabird bycatch and shows the least promise of these methods as an effective bycatch mitigation strategy.
Effect on Bycatch: Reduced bycatch but least effective of 3 tested techniques
Reference:
Gilman, E., N. Brothers, and D. Kobayashi, 2003 , Performance Assessment of Underwater Setting Chutes, Side-Setting, and Blue-Dyed Bait to Minimize Seabird Mortality in Hawaii Pelagic Longline Tuna and Swordfish Fisheries

Hawaii

Hooks-and-Lines
Swordfish and tuna
Side sets
Seabirds Field study in the wild
Summary: Underwater setting chutes, blue-dyed bait, and side-sets each reduced the bycatch of seabirds (Laysan and black-footed albatross and short-tailed shearwater) in the Hawaiian longline tuna and swordfish fisheries. Side-sets showed the most promise for a bycatch mitigation technique while blue-dyed bait was the least effective at reducing seabird bycatch and shows the least promise of these methods as an effective bycatch mitigation strategy.
Effect on Bycatch: Reduced bycatch; most promising of 3 tested techniques
Reference:
Gilman, E., N. Brothers, and D. Kobayashi, 2003 , Performance Assessment of Underwater Setting Chutes, Side-Setting, and Blue-Dyed Bait to Minimize Seabird Mortality in Hawaii Pelagic Longline Tuna and Swordfish Fisheries

Gulf of Mexico

Trawls
shrimp
Excluder devices
Sea Turtles Field study in the wild
Summary: Turtle excluder devices reduce sea turtle and non-target finfish (Atlantic croaker (Micropogonias undulateus), spot (Leiostomus exanthurus), sea catfish (Arius felis), and weakfish (Cynoscion regalis)) bycatch in the Gulf of Mexico prawn trawl fishery. Catch of targeted shrimp varied by location and TED configuration, but there was no significant difference in shrimp catch rates in 3 of the 4 TEDs when compared with a control net. One experimental TED in Texas exhibited a decrease in shrimp catch.
Effect on Bycatch: Reduced bycatch
Reference:
Christian, P. and Harrington, D, 1987 , Loggerhead turtle, finfish and shrimp retention studies on four excluder devices (TEDs)

Washington State

Gillnets
Salmon
Acoustic deterrent devices

Visual deterrents
Seabirds Field study in the wild
Summary: Acoustic pingers reduced the bycatch of the Common Murre (Uria aalge) in the Puget Sound salmon drift gillnet fishery, but they did not reduce bycatch of the rhinoceros auklet (Cerorhinca monocerata). Reduction of target species catch was not significant. White gillnet mesh panels in the upper portion of the net reduce the bycatch of seabirds (Common Murres and Rhinoceros Auklet) in the Puget Sound salmon drift gillnet fishery. Rhinoceros Auklet bycatch was only reduced in 50-mesh visual alert nets. The white mesh panels decreased salmon catch in 50-mesh but not in 20-mesh.
Effect on Bycatch: Variable depending on seabird species
Reference:
Melvin, E.F., J.K. Parrish, and L.L. Conquest, 1999 , Novel tools to reduce seabird bycatch in coastal gillnet fisheries

Washington State

Gillnets
Salmon
Acoustic deterrent devices

Visual deterrents
Seabirds Field study in the wild
Summary: Acoustic pingers reduced the bycatch of the Common Murre (Uria aalge) in the Puget Sound salmon drift gillnet fishery, but they did not reduce bycatch of the rhinoceros auklet (Cerorhinca monocerata). Reduction of target species catch was not significant. White gillnet mesh panels in the upper portion of the net reduce the bycatch of seabirds (Common Murres and Rhinoceros Auklet) in the Puget Sound salmon drift gillnet fishery. Rhinoceros Auklet bycatch was only reduced in 50-mesh visual alert nets. The white mesh panels decreased salmon catch in 50-mesh but not in 20-mesh.
Effect on Bycatch: Reduced bycatch but results varied by mesh size
Reference:
Melvin, E.F., J.K. Parrish, and L.L. Conquest, 1999 , Novel tools to reduce seabird bycatch in coastal gillnet fisheries

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