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ant

Study Type
Field study in the wild
Location
North Pacific, Japan
Target catch
Swordfish
Effect on bycatch species
Little effect on catch rates, mortality or size composition
Effect on target catch
Not reported
Bycatch species
Sharks
Reduction technique
Circle hooks
Fishing Gear
Hooks-and-Lines

ant

Study Type
Field study in the wild
Location
North Pacific, Japan
Target catch
Swordfish
Effect on bycatch species
Little effect on catch rates, mortality or size composition
Effect on target catch
Not reported
Bycatch species
Sharks
Reduction technique
Circle hooks
Fishing Gear
Hooks-and-Lines

The impact of turtle excluder devices and bycatch reduction devices on diverse tropical marine communities in Australia's northern prawn trawl fishery

Submitted by morgaac on

The catches from five experimental trawls (TED + fisheye BRD, upward facing TED, downward facing TED, bigeye BRD and square-mesh panel BRD) were compared to those of the standard twin Florida Flyer prawn trawl. Nets with a combination of a TED and BRD reduced sea turtle catches by 100%, large sponges by 85.3%, sharks by 36.3% and rays by 17.7% and reduced the proportion of soft and damaged prawns by 41.6% and catches of tiger prawns by 6.5%. Upward and downward facing TED's reduced sea turtle bycatch by 99% and 100% respectively and large sponges by 81.6% and 95.9% respectively.

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Field Study 275

Study Type
Field study in the wild
Location
Northern Australia
Target catch
Prawns
Effect on bycatch species
Reduced sea turtle catches by 100%
Effect on target catch
Reduced the proportion of soft and damaged prawns by 41.6% and reduced catches of tiger prawns by 6.5%
Bycatch species
Sea Turtles
Reduction technique
Excluder devices
Fishing Gear
Trawls

Field Study 275

Study Type
Field study in the wild
Location
Northern Australia
Target catch
Prawns
Effect on bycatch species
Reduced sea turtle catches by 100%
Effect on target catch
Reduced the proportion of soft and damaged prawns by 41.6% and reduced catches of tiger prawns by 6.5%
Bycatch species
Sea Turtles
Reduction technique
Excluder devices
Fishing Gear
Trawls

Field Study 275

Study Type
Field study in the wild
Location
Northern Australia
Target catch
Prawns
Effect on bycatch species
Reduced sea turtle catches by 100%
Effect on target catch
Reduced the proportion of soft and damaged prawns by 41.6% and reduced catches of tiger prawns by 6.5%
Bycatch species
Sea Turtles
Reduction technique
Excluder devices
Fishing Gear
Trawls

Field Study 275

Study Type
Field study in the wild
Location
Northern Australia
Target catch
Prawns
Effect on bycatch species
Reduced sea turtle catches by 100%
Effect on target catch
Reduced the proportion of soft and damaged prawns by 41.6% and reduced catches of tiger prawns by 6.5%
Bycatch species
Sea Turtles
Reduction technique
Excluder devices
Fishing Gear
Trawls

The effect of light toriline on seabird by-catch and fish catch rates in the pelagic longline fishery off southern Brazil

Submitted by morgaac on

The use of light torilines (made with nylon monofilament branch lines and streamers made from other light material) on pelagic longlines reduced the incidental capture of seabirds by 64%. The capture of target species, including swordfish and blue sharks, was increased by 32% and 15.1% respectively when light torilines were used.
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ant

Study Type
Field study in the wild
Location
Southern Brazil
Target catch
Swordfish, blue sharks
Effect on bycatch species
Reduced incidental capture of seabirds by 64%
Effect on target catch
Increased catch rates of target species (swordfish by 32% and blue sharks by 15.1%)
Bycatch species
Seabirds
Reduction technique
Bird-scaring devices
Fishing Gear
Hooks-and-Lines

ant

Study Type
Field study in the wild
Location
Southern Brazil
Target catch
Swordfish, blue sharks
Effect on bycatch species
Reduced incidental capture of seabirds by 64%
Effect on target catch
Increased catch rates of target species (swordfish by 32% and blue sharks by 15.1%)
Bycatch species
Seabirds
Reduction technique
Bird-scaring devices
Fishing Gear
Hooks-and-Lines

ant

Study Type
Field study in the wild
Location
Southern Brazil
Target catch
Swordfish, blue sharks
Effect on bycatch species
Reduced incidental capture of seabirds by 64%
Effect on target catch
Increased catch rates of target species (swordfish by 32% and blue sharks by 15.1%)
Bycatch species
Seabirds
Reduction technique
Bird-scaring devices
Fishing Gear
Hooks-and-Lines

Efficiency of bycatch reduction devices in small otter trawls used in the Florida shrimp fishery

Submitted by morgaac on

The extended mesh funnel (EMF) and Florida fisheye (FFE) bycatch reduction devices (BRD) were evaluated in otter trawls with three different sized openings (circumference = 14 m, 17 m, and 20 m). The mean ratio of finfish bycatch to shrimp in nets equipped with BRD's was substantially lower but not significantly different than the ratios in the control nets.
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Field Study 280

Study Type
Field study in the wild
Location
Florida
Target catch
Shrimp
Effect on bycatch species
Reduced the biomass and number of finfish and the catch per unit effort
Effect on target catch
The number and biomass was not reduced in the 17 m or 20 m nets and the catch per unit effort varied by season and net size. Less shrimp was caught in the winter using the 14m nets.
Bycatch species
Bony Fishes
Reduction technique
Excluder devices
Fishing Gear
Trawls

Field Study 280

Study Type
Field study in the wild
Location
Florida
Target catch
Shrimp
Effect on bycatch species
Reduced the biomass and number of finfish and the catch per unit effort
Effect on target catch
The number and biomass was not reduced in the 17 m or 20 m nets and the catch per unit effort varied by season and net size. Less shrimp was caught in the winter using the 14m nets.
Bycatch species
Bony Fishes
Reduction technique
Excluder devices
Fishing Gear
Trawls

Field Study 280

Study Type
Field study in the wild
Location
Florida
Target catch
Shrimp
Effect on bycatch species
Reduced the biomass and number of finfish and the catch per unit effort
Effect on target catch
The number and biomass was not reduced in the 17 m or 20 m nets and the catch per unit effort varied by season and net size. Less shrimp was caught in the winter using the 14m nets.
Bycatch species
Bony Fishes
Reduction technique
Excluder devices
Fishing Gear
Trawls

The efficiency of a bycatch reduction device used in skimmer trawls in the Florida shrimp fishery

Submitted by morgaac on

The Florida fisheye (FFE) bycatch reduction device was tested in a skimmer trawl fishery in Florida. Trawls equipped with the FFE had significantly lower finfish bycatch than the control nets but there was no difference in the quantity of shrimp caught between the two nets. The amount of reduction in finfish bycatch in the FFE equipped nets did vary by season and among fish species.
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