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Experiments in the Western Atlantic Northeast Distant Waters to Evaluate Sea Turtle Mitigation Measures in the Pelagic Longline Fishery. Report on Experiments Conducted in 2001-2003

Study Type
Field study in the wild
Location
Atlantic
Target catch
Swordfish and tuna
Effect on bycatch species
Reduced bycatch
Effect on target catch
Effect varied by species and by bait
Bycatch species
Caretta caretta (Loggerhead turtle)
Demochelys coriacea (Leatherback sea 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 2001-2003

Study Type
Field study in the wild
Location
Atlantic
Target catch
Swordfish and tuna
Effect on bycatch species
Reduced bycatch
Effect on target catch
Effect varied by species and by bait
Bycatch species
Caretta caretta (Loggerhead turtle)
Demochelys coriacea (Leatherback sea 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 2001-2003

Study Type
Field study in the wild
Location
Atlantic
Target catch
Swordfish and tuna
Effect on bycatch species
Reduced bycatch
Effect on target catch
Effect varied by species and by bait
Bycatch species
Caretta caretta (Loggerhead turtle)
Demochelys coriacea (Leatherback sea 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 2001-2003

Study Type
Field study in the wild
Location
Atlantic
Target catch
Swordfish and tuna
Effect on bycatch species
Reduced bycatch
Effect on target catch
Effect varied by species and by bait
Bycatch species
Caretta caretta (Loggerhead turtle)
Demochelys coriacea (Leatherback sea turtle)
Reduction technique
Circle hooks
Fishing Gear
Hooks-and-Lines

Experiment to Evaluate Gear Modification on Rates of Sea Turtle Bycatch in the Swordfish Longline Fishery in the Azores Phase 2

Study Type
Field study in the wild
Location
Azores
Target catch
Swordfish and blue shark
Effect on bycatch species
Did not reduce bycatch; reduced rate of throat hooking
Effect on target catch
Increased blue shark catch when compared to J hooks
Bycatch species
Caretta caretta (Loggerhead turtle)
Reduction technique
Circle hooks
Fishing Gear
Hooks-and-Lines

Experiment to Evaluate Gear Modification on Rates of Sea Turtle Bycatch in the Swordfish Longline Fishery in the Azores Phase 2

Study Type
Field study in the wild
Location
Azores
Target catch
Swordfish and blue shark
Effect on bycatch species
Did not reduce bycatch; reduced rate of throat hooking
Effect on target catch
Increased blue shark catch when compared to J hooks
Bycatch species
Caretta caretta (Loggerhead turtle)
Reduction technique
Circle hooks
Fishing Gear
Hooks-and-Lines

Experiment to Evaluate Gear Modification on Rates of Sea Turtle Bycatch in the Swordfish Longline Fishery in the Azores Phase 2

Study Type
Field study in the wild
Location
Azores
Target catch
Swordfish and blue shark
Effect on bycatch species
Did not reduce bycatch; reduced rate of throat hooking
Effect on target catch
Increased blue shark catch when compared to J hooks
Bycatch species
Caretta caretta (Loggerhead turtle)
Reduction technique
Circle hooks
Fishing Gear
Hooks-and-Lines

Experiment to Evaluate Gear Modification on Rates of Sea Turtle Bycatch in the Swordfish Longline Fishery in the Azores Phase 3

Study Type
Field study in the wild
Location
Azores
Target catch
Swordfish and blue shark
Effect on bycatch species
Decreased throat hooking
Bycatch species
Caretta caretta (Loggerhead turtle)
Reduction technique
Circle hooks
Fishing Gear
Hooks-and-Lines

Experiment to Evaluate Gear Modification on Rates of Sea Turtle Bycatch in the Swordfish Longline Fishery in the Azores Phase 3

Study Type
Field study in the wild
Location
Azores
Target catch
Swordfish and blue shark
Effect on bycatch species
Decreased throat hooking
Bycatch species
Caretta caretta (Loggerhead turtle)
Reduction technique
Circle hooks
Fishing Gear
Hooks-and-Lines

Experiment to Evaluate Gear Modification on Rates of Sea Turtle Bycatch in the Swordfish Longline Fishery in the Azores Phase 3

Study Type
Field study in the wild
Location
Azores
Target catch
Swordfish and blue shark
Effect on bycatch species
Decreased throat hooking
Bycatch species
Caretta caretta (Loggerhead turtle)
Reduction technique
Circle hooks
Fishing Gear
Hooks-and-Lines

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

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
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