Caretta caretta (Loggerhead turtle)

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Bottom trawl catch comparison in the Mediterranean Sea: Flexible Turtle Excluder Device (TED) vs traditional gear

Study Type: 

Field study in the wild

Location: 

Mediterranean Sea

Target catch: 

Demersal fish

Effect on bycatch species: 

Unknown (no turtles captured in either control or experimental trawls)

Effect on target catch: 

No significant loss of commercial weight of fish, similar rates of capture without any significant loss of sizes (with the exception of anglerfish), significant reduction of debris in the codend

Article: 

Bottom trawl catch comparison in the Mediterranean Sea: Flexible Turtle Excluder Device (TED) vs traditional gear

Bycatch species: 

Reduction technique: 

Fishing Gear: 

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: 

Reduction technique: 

Fishing Gear: 

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: 

Article: 

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

Bycatch species: 

Reduction technique: 

Fishing Gear: 

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: 

Reduction technique: 

Fishing Gear: 

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: 

Reduction technique: 

Fishing Gear: 

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: 

Reduction technique: 

Fishing Gear: 

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: 

Fishing Gear: 

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