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Experiment to Evaluate Gear Modification on Rates of Sea Turtle Bycatch in the Swordfish Longline Fishery in the Azores Phase 4

Study Type
Field study in the wild
Location
Azores
Target catch
Swordfish and blue shark
Effect on bycatch species
Non-offset 16/0 and 18/0 circle hooks caught fewer turtles than Japanese tuna hook. Non-offset 18/0 circle hooks caught fewer turtles than non-offset 16/0
Effect on target catch
There was no significant difference in the number of blue sharks caught on non-offset 16/0 and 18/0 circle hooks .
Bycatch species
Caretta caretta (Loggerhead turtle)
Reduction technique
Circle hooks
Fishing Gear
Hooks-and-Lines

Experiments in the Western Atlantic Northeast Distant Waters to Evaluate Sea Turtle Mitigation Measures in the Pelagic Longline Fishery. Report on Experiments Conducted in 2001

Study Type
Field study in the wild
Location
Atlantic
Target catch
Swordfish and tuna
Effect on bycatch species
Did not reduce bycatch
Bycatch species
Caretta caretta (Loggerhead turtle)
Demochelys coriacea (Leatherback sea turtle)
Reduction technique
Dyed bait
Fishing Gear
Hooks-and-Lines

Experiments in the Western Atlantic Northeast Distant Waters to Evaluate Sea Turtle Mitigation Measures in the Pelagic Longline Fishery. Report on Experiments Conducted in 2001

Study Type
Field study in the wild
Location
Atlantic
Target catch
Swordfish and tuna
Effect on bycatch species
Did not reduce bycatch
Bycatch species
Caretta caretta (Loggerhead turtle)
Demochelys coriacea (Leatherback sea turtle)
Reduction technique
Dyed bait
Fishing Gear
Hooks-and-Lines

Experiments in the Western Atlantic Northeast Distant Waters to Evaluate Sea Turtle Mitigation Measures in the Pelagic Longline Fishery. Report on Experiments Conducted in 2001

Study Type
Field study in the wild
Location
Atlantic
Target catch
Swordfish and tuna
Effect on bycatch species
Did not reduce bycatch
Bycatch species
Caretta caretta (Loggerhead turtle)
Demochelys coriacea (Leatherback sea turtle)
Reduction technique
Dyed bait
Fishing Gear
Hooks-and-Lines

Experiments in the Western Atlantic Northeast Distant Waters to Evaluate Sea Turtle Mitigation Measures in the Pelagic Longline Fishery. Report on Experiments Conducted in 2001

Study Type
Field study in the wild
Location
Atlantic
Target catch
Swordfish and tuna
Effect on bycatch species
Did not reduce bycatch
Bycatch species
Caretta caretta (Loggerhead turtle)
Demochelys coriacea (Leatherback sea turtle)
Reduction technique
Dyed bait
Fishing Gear
Hooks-and-Lines

Nylon barium sulphate gillnet reduces porpoise and seabird mortality

Study Type
Field study in the wild
Location
Canada
Target catch
Multiple species
Effect on bycatch species
Reduced harbor porpoise bycatch
Effect on target catch
No difference in catch
Bycatch species
Small Cetaceans (maximum length < 7.5 meters)
Phocoena phocoena (Harbor porpoise)
Seabirds
Reduction technique
Metal oxide/barium sulfate nets
Fishing Gear
Gillnets

Nylon barium sulphate gillnet reduces porpoise and seabird mortality

Study Type
Field study in the wild
Location
Canada
Target catch
Multiple species
Effect on bycatch species
Reduced harbor porpoise bycatch
Effect on target catch
No difference in catch
Bycatch species
Small Cetaceans (maximum length < 7.5 meters)
Phocoena phocoena (Harbor porpoise)
Seabirds
Reduction technique
Metal oxide/barium sulfate nets
Fishing Gear
Gillnets

Nylon barium sulphate gillnet reduces porpoise and seabird mortality

Study Type
Field study in the wild
Location
Canada
Target catch
Multiple species
Effect on bycatch species
Reduced harbor porpoise bycatch
Effect on target catch
No difference in catch
Bycatch species
Small Cetaceans (maximum length < 7.5 meters)
Phocoena phocoena (Harbor porpoise)
Seabirds
Reduction technique
Metal oxide/barium sulfate nets
Fishing Gear
Gillnets

Nylon barium sulphate gillnet reduces porpoise and seabird mortality

Study Type
Field study in the wild
Location
Canada
Target catch
Multiple species
Effect on bycatch species
Reduced harbor porpoise bycatch
Effect on target catch
No difference in catch
Bycatch species
Small Cetaceans (maximum length < 7.5 meters)
Phocoena phocoena (Harbor porpoise)
Seabirds
Reduction technique
Metal oxide/barium sulfate nets
Fishing Gear
Gillnets

Nylon barium sulphate gillnet reduces porpoise and seabird mortality

Study Type
Field study in the wild
Location
Canada
Target catch
Multiple species
Effect on bycatch species
Reduced harbor porpoise bycatch
Effect on target catch
No difference in catch
Bycatch species
Small Cetaceans (maximum length < 7.5 meters)
Phocoena phocoena (Harbor porpoise)
Seabirds
Reduction technique
Metal oxide/barium sulfate nets
Fishing Gear
Gillnets

Target strength of a nylon monofilament and an acoustically enhanced gillnet: predictions of biosonar detection ranges

Study Type
Field study in the wild
Location
Captivity
Target catch
Trout
Effect on bycatch species
Increased detectability
Bycatch species
Small Cetaceans (maximum length < 7.5 meters)
Phocoena phocoena (Harbor porpoise)
Reduction technique
Metal oxide/barium sulfate nets
Fishing Gear
Gillnets

Target strength of a nylon monofilament and an acoustically enhanced gillnet: predictions of biosonar detection ranges

Study Type
Field study in the wild
Location
Captivity
Target catch
Trout
Effect on bycatch species
Increased detectability
Bycatch species
Small Cetaceans (maximum length < 7.5 meters)
Phocoena phocoena (Harbor porpoise)
Reduction technique
Metal oxide/barium sulfate nets
Fishing Gear
Gillnets

Target strength of a nylon monofilament and an acoustically enhanced gillnet: predictions of biosonar detection ranges

Study Type
Field study in the wild
Location
Captivity
Target catch
Trout
Effect on bycatch species
Increased detectability
Bycatch species
Small Cetaceans (maximum length < 7.5 meters)
Phocoena phocoena (Harbor porpoise)
Reduction technique
Metal oxide/barium sulfate nets
Fishing Gear
Gillnets

Target strength of a nylon monofilament and an acoustically enhanced gillnet: predictions of biosonar detection ranges

Study Type
Field study in the wild
Location
Captivity
Target catch
Trout
Effect on bycatch species
Increased detectability
Bycatch species
Small Cetaceans (maximum length < 7.5 meters)
Phocoena phocoena (Harbor porpoise)
Reduction technique
Metal oxide/barium sulfate nets
Fishing Gear
Gillnets
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