Bony Fishes

Comparison of bycatch species captured during daytime and nighttime: preliminary results of longline experiments carried out in the Seychelles waters

Study Type: 

summary

Location: 

Seychelles

Target catch: 

swordfish and tuna

Effect on bycatch species: 

All marketable species were caught in the 150 m layer during day and night sets.

Effect on target catch: 

Differences in the species composition, quantity and depth of capture for bycatch species

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Fishing Gear: 

Bycatch species: 

Reducing bycatch in coral reef trap fisheries: escape gaps as a step towards sustainability

Study Type: 

wild

Location: 

Curacao

Target catch: 

Groupers and snappers

Effect on bycatch species: 

Short and tall gap traps reduced bycatch of bycatch fish by 74% and 80%, key herbivores by 58% and 50% and butterflyfish by 90% and 98%, respectively.

Effect on target catch: 

Catches of high-value fish were not affected

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Bycatch species: 

Reduction technique: 

Fishing Gear: 

Testing of an industry-designed bycatch reduction device to reduce the incidental catch of Pacific halibut in a groundfish bottom trawl fishery

Study Type: 

wild

Location: 

US west coast

Target catch: 

Flatfish

Effect on bycatch species: 

83.7% (weight) and 74.3% (number) of Pacific halibut were able to escape

Effect on target catch: 

93.3% of arrowtooth flounder, 99% of Dove sole, 96.9% of petrale sole, 96.9% of shortspine thronyhead and 90% of sablefish were retained

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Bycatch species: 

Reduction technique: 

Fishing Gear: 

Initial tests of a bycatch reduction device designed to improve trawl selectivity in the west coast limited entry groundfish bottom trawl directed flatfish fishery

Study Type: 

wild

Location: 

US west coast

Target catch: 

Flatfish

Effect on bycatch species: 

72.1% of rockfish, 96.5% of roundfishes and 93.7% of Pacific halibut were able to escape

Effect on target catch: 

85.1% of flatfish were retained

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Bycatch species: 

Reduction technique: 

Fishing Gear: 

Examining the potential use of artificial illumination to enhance Chinook salmon escapement out a bycatch reduction device in a Pacific hake midwater trawl

Study Type: 

wild

Location: 

Oregon

Target catch: 

Pacific hake

Effect on bycatch species: 

Chinook were able to escape out of the escape window; Rockfish bycatch was reduced by 32.4%

Effect on target catch: 

Pacific hake continued to swim into the codend

Reduction technique: 

Bycatch species: 

Fishing Gear: 

An assessment of bycatch reduction devices in Kuwait's shrimp trawl fishery

Study Type: 

wild

Location: 

Kuwait

Target catch: 

Shrimp

Effect on bycatch species: 

FE significantly reduced bycatch catches

Effect on target catch: 

FE significantly reduced shrimp catches

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Bycatch species: 

Reduction technique: 

Fishing Gear: 

An assessment of bycatch reduction devices in Kuwait's shrimp trawl fishery

Study Type: 

wild

Location: 

Kuwait

Target catch: 

Shrimp

Effect on bycatch species: 

SMT significantly reduced bycatch

Effect on target catch: 

SMT caught significantly larger shrimp but not significantly fewer shrimp

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Bycatch species: 

Reduction technique: 

Fishing Gear: 

An assessment of bycatch reduction devices in Kuwait's shrimp trawl fishery

Study Type: 

wild

Location: 

Kuwait

Target catch: 

Shrimp

Effect on bycatch species: 

TED use resulted in no interactions with sea turtles or large animals; did not significantly reduce bycatch catches

Effect on target catch: 

Did not significantly reduce shrimp catches

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Bycatch species: 

Reduction technique: 

Fishing Gear: 

A comparison of circle hook and J hook performance in a western equatorial Atlantic Ocean pelagic longline fishery

Study Type: 

wild

Location: 

Equatorial Atlantic Ocean

Target catch: 

Tuna

Effect on bycatch species: 

Catch rates were lower for leatherback sea turtles and pelagic stingrays but not sailfish when circle hooks were used

Effect on target catch: 

Bigeye tuna had higher catch rates when circle hooks were used

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Bycatch species: 

Reduction technique: 

Fishing Gear: 

A comparison of circle hook and J hook performance in a western equatorial Atlantic Ocean pelagic longline fishery

Study Type: 

wild

Location: 

Equatorial Atlantic Ocean

Target catch: 

Tuna

Effect on bycatch species: 

Swordfish and sailfish had significantly higher external hookings when circle hooks were used

Effect on target catch: 

Article: 

Bycatch species: 

Reduction technique: 

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