Caretta caretta (Loggerhead turtle)

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Buoyless nets reduce sea turtle bycatch in coastal net fisheries

Study Type:

Field study in the wild

Location:

Baja California Sur, Mexico

Target catch:

Grouper, halibut and guitar-fish

Effect on bycatch species:

Buoyless nets reduced bycatch by 68%

Effect on target catch:

No effect on target catch rates

Article:

Buoyless nets reduce sea turtle bycatch in coastal net fisheries

Bycatch species:

Caretta caretta (Loggerhead turtle)

Reduction technique:

Sub-surface sets (gillnets)

Fishing Gear:

Gillnets

Circle hook effectiveness for the mitigation of sea turtle bycatch and capture of target species in a Brazilian pelagic longline fishery

Study Type:

Field study in the wild

Location:

South-western Atlantic Ocean

Target catch:

Tuna, blue sharks, swordfish

Effect on bycatch species:

De-hooking was decreased from 25% to 5.8% in loggerhead sea turtles when circle hooks were used.

Effect on target catch:

Bycatch species:

Reduction technique:

Circle hooks

Fishing Gear:

Hooks-and-Lines

Are circle hooks effective in reducing incidental captures of loggerhead sea turtles in a Mediterranean longline fishery?

Study Type:

Field study in the wild

Location:

Strait of Sicily

Target catch:

Swordfish

Effect on bycatch species:

J hooks resulted in more hooks being swallowed compared to circle hooks

Effect on target catch:

None reported

Article:

Are circle hooks effective in reducing incidental captures of loggerhead sea turtles in a Mediterranean longline fishery?

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:

Circle hooks resulted in fewer turtles being caught in the throat

Effect on target catch:

Article:

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

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:

There was no significant difference in the number of loggerhead sea turtles caught in the Azores longline swordfish and blue shark fishery between straight 16/0, offset 16/0, and offset 18/0 circle hooks.

Effect on target catch:

Straight 16/0 circle hooks caught the most blue sharks in the Azores longline swordfish and blue shark fishery, followed by offset 18/0 circle hooks. Offset 16/0 circle hooks caught the fewest blue sharks.

Article:

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

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 2001-2003.

Study Type:

Field study in the wild

Location:

Atlantic

Target catch:

swordfish and tuna

Effect on bycatch species:

Reduced interactions

Effect on target catch:

Swordfish catch decreased when circle hooks were baited with squid but increased when baited with mackerel. Tuna catch increased when circle hooks were baited with squid but decreased when baited with mackerel.

Article:

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

Bycatch species:

Reduction technique:

Alternative bait

Fishing Gear:

Hooks-and-Lines

Fishing methods to reduce sea turtle mortality associated with pelagic longlines

Study Type:

Field study in the wild

Location:

NW Atlantic

Target catch:

swordfish and tuna

Effect on bycatch species:

Reduced interactions

Article:

Fishing methods to reduce sea turtle mortality associated with pelagic longlines

Bycatch species:

Reduction technique:

Fishing Gear:

Hooks-and-Lines

Food color and marine turtle feeding behavior: Can blue bait reduce turtle bycatch in commercial fisheries?

Study Type:

Field study in the wild

Location:

Costa Rica

Target catch:

swordfish and tuna

Effect on bycatch species:

Reduced interactions

Article:

Food color and marine turtle feeding behavior: Can blue bait reduce turtle bycatch in commercial fisheries?

Bycatch species:

Reduction technique:

Dyed bait

Fishing Gear:

Hooks-and-Lines

Field Study 723

Study Type:

Field study in the wild

Location:

Western North Atlantic

Target catch:

Swordfish and tuna

Effect on bycatch species:

Circle hooks decreased loggerhead and leatherback catch; even more effective for loggerheads when combined with mackerel bait

Effect on target catch:

Circle hooks combined with mackerel bait increased swordfish catch by weight. With squid, decreased swordfish catch, increased bluefin and albacore tuna catch. Mackerel bait decreased bigeye and albacore tuna catch.