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Using automated video analysis to study fish escapement through escape panels in active fishing gears: Application to the effect of net colour.

Study Type
Field study in the wild
Target catch
Demersal fish
Effect on bycatch species
60% of all fish escaped through the white panel
Effect on target catch
Not tested
Bycatch species
Bony Fishes
Reduction technique
Excluder devices
Fishing Gear
Trawls

Using automated video analysis to study fish escapement through escape panels in active fishing gears: Application to the effect of net colour.

Study Type
Field study in the wild
Target catch
Demersal fish
Effect on bycatch species
60% of all fish escaped through the white panel
Effect on target catch
Not tested
Bycatch species
Bony Fishes
Reduction technique
Excluder devices
Fishing Gear
Trawls

The efficacy of illumination to reduce bycatch of eulachon and groundfishes before trawl capture in the eastern North Pacific ocean shrimp fishery

Study Type
Field study in the wild
Location
Oregon, USA
Target catch
Ocean shrimp (Pandalus jordani)
Effect on bycatch species
Illumination reduced bycatch of eulachon (Thaleichthys pacificus) and yellowtail rockfish (Sebastes flavidus), but did not result in significant changes in the bycatch of other rockfish (Sebastes spp.) and flatfish
Effect on target catch
No change in average catch efficiency or length-dependent catch efficiency.
Bycatch species
Bony Fishes
Reduction technique
Visual deterrents
Fishing Gear
Trawls

The efficacy of illumination to reduce bycatch of eulachon and groundfishes before trawl capture in the eastern North Pacific ocean shrimp fishery

Study Type
Field study in the wild
Location
Oregon, USA
Target catch
Ocean shrimp (Pandalus jordani)
Effect on bycatch species
Illumination reduced bycatch of eulachon (Thaleichthys pacificus) and yellowtail rockfish (Sebastes flavidus), but did not result in significant changes in the bycatch of other rockfish (Sebastes spp.) and flatfish
Effect on target catch
No change in average catch efficiency or length-dependent catch efficiency.
Bycatch species
Bony Fishes
Reduction technique
Visual deterrents
Fishing Gear
Trawls

The efficacy of illumination to reduce bycatch of eulachon and groundfishes before trawl capture in the eastern North Pacific ocean shrimp fishery

Study Type
Field study in the wild
Location
Oregon, USA
Target catch
Ocean shrimp (Pandalus jordani)
Effect on bycatch species
Illumination reduced bycatch of eulachon (Thaleichthys pacificus) and yellowtail rockfish (Sebastes flavidus), but did not result in significant changes in the bycatch of other rockfish (Sebastes spp.) and flatfish
Effect on target catch
No change in average catch efficiency or length-dependent catch efficiency.
Bycatch species
Bony Fishes
Reduction technique
Visual deterrents
Fishing Gear
Trawls

An illuminating idea to reduce bycatch in the Peruvian small-scale gillnet fishery.

Study Type
Field study in the wild
Location
San Jose, Salaverry, Ancon, Peru
Target catch
Elasmobranchs, tuna, dolphinfish
Effect on bycatch species
Bycatch probability per set was reduced by up to 74.4% for sea turtles and 70.8 for small cetaceans in comparison to non-illuminated nets. For seabirds, nominal BPUE decreased by 84% in the presence of LEDs.
Effect on target catch
No effect
Bycatch species
Small Cetaceans (maximum length < 7.5 meters)
Seabirds
Sea Turtles
Reduction technique
Visual deterrents
Fishing Gear
Gillnets

An illuminating idea to reduce bycatch in the Peruvian small-scale gillnet fishery.

Study Type
Field study in the wild
Location
San Jose, Salaverry, Ancon, Peru
Target catch
Elasmobranchs, tuna, dolphinfish
Effect on bycatch species
Bycatch probability per set was reduced by up to 74.4% for sea turtles and 70.8 for small cetaceans in comparison to non-illuminated nets. For seabirds, nominal BPUE decreased by 84% in the presence of LEDs.
Effect on target catch
No effect
Bycatch species
Small Cetaceans (maximum length < 7.5 meters)
Seabirds
Sea Turtles
Reduction technique
Visual deterrents
Fishing Gear
Gillnets

An illuminating idea to reduce bycatch in the Peruvian small-scale gillnet fishery.

Study Type
Field study in the wild
Location
San Jose, Salaverry, Ancon, Peru
Target catch
Elasmobranchs, tuna, dolphinfish
Effect on bycatch species
Bycatch probability per set was reduced by up to 74.4% for sea turtles and 70.8 for small cetaceans in comparison to non-illuminated nets. For seabirds, nominal BPUE decreased by 84% in the presence of LEDs.
Effect on target catch
No effect
Bycatch species
Small Cetaceans (maximum length < 7.5 meters)
Seabirds
Sea Turtles
Reduction technique
Visual deterrents
Fishing Gear
Gillnets

An illuminating idea to reduce bycatch in the Peruvian small-scale gillnet fishery.

Study Type
Field study in the wild
Location
San Jose, Salaverry, Ancon, Peru
Target catch
Elasmobranchs, tuna, dolphinfish
Effect on bycatch species
Bycatch probability per set was reduced by up to 74.4% for sea turtles and 70.8 for small cetaceans in comparison to non-illuminated nets. For seabirds, nominal BPUE decreased by 84% in the presence of LEDs.
Effect on target catch
No effect
Bycatch species
Small Cetaceans (maximum length < 7.5 meters)
Seabirds
Sea Turtles
Reduction technique
Visual deterrents
Fishing Gear
Gillnets

An illuminating idea to reduce bycatch in the Peruvian small-scale gillnet fishery.

Study Type
Field study in the wild
Location
San Jose, Salaverry, Ancon, Peru
Target catch
Elasmobranchs, tuna, dolphinfish
Effect on bycatch species
Bycatch probability per set was reduced by up to 74.4% for sea turtles and 70.8 for small cetaceans in comparison to non-illuminated nets. For seabirds, nominal BPUE decreased by 84% in the presence of LEDs.
Effect on target catch
No effect
Bycatch species
Small Cetaceans (maximum length < 7.5 meters)
Seabirds
Sea Turtles
Reduction technique
Visual deterrents
Fishing Gear
Gillnets

Release efficiency and selectivity of four different square mesh panel configurations in the Basque mixed bottom trawl fishery

Study Type
Field study in the wild
Location
Bay of Biscay
Target catch
hake (Merluccius merluccius), megrim (Lepidorhombus, spp.), and anglerfish (Lophius spp.)
Effect on bycatch species
Increasing panel size increased escapes of blue whiting
Effect on target catch
Placing the square mesh panel lower in. the trawl net panel increased escape of undersized hake
Bycatch species
Bony Fishes
Reduction technique
Excluder devices
Visual deterrents
Fishing Gear
Trawls

Release efficiency and selectivity of four different square mesh panel configurations in the Basque mixed bottom trawl fishery

Study Type
Field study in the wild
Location
Bay of Biscay
Target catch
hake (Merluccius merluccius), megrim (Lepidorhombus, spp.), and anglerfish (Lophius spp.)
Effect on bycatch species
Increasing panel size increased escapes of blue whiting
Effect on target catch
Placing the square mesh panel lower in. the trawl net panel increased escape of undersized hake
Bycatch species
Bony Fishes
Reduction technique
Excluder devices
Visual deterrents
Fishing Gear
Trawls

Release efficiency and selectivity of four different square mesh panel configurations in the Basque mixed bottom trawl fishery

Study Type
Field study in the wild
Location
Bay of Biscay
Target catch
hake (Merluccius merluccius), megrim (Lepidorhombus, spp.), and anglerfish (Lophius spp.)
Effect on bycatch species
Increasing panel size increased escapes of blue whiting
Effect on target catch
Placing the square mesh panel lower in. the trawl net panel increased escape of undersized hake
Bycatch species
Bony Fishes
Reduction technique
Excluder devices
Visual deterrents
Fishing Gear
Trawls

Release efficiency and selectivity of four different square mesh panel configurations in the Basque mixed bottom trawl fishery

Study Type
Field study in the wild
Location
Bay of Biscay
Target catch
hake (Merluccius merluccius), megrim (Lepidorhombus, spp.), and anglerfish (Lophius spp.)
Effect on bycatch species
Increasing panel size increased escapes of blue whiting
Effect on target catch
Placing the square mesh panel lower in. the trawl net panel increased escape of undersized hake
Bycatch species
Bony Fishes
Reduction technique
Excluder devices
Visual deterrents
Fishing Gear
Trawls

Shorter trawls improve size selection of northern shrimp

Study Type
Field study in the wild
Location
Skagerrak, Norway
Target catch
Northern shrimp (Pandalus borealis)
Effect on bycatch species
Bycatch of Norway pout was slightly reduced in the shorter trawl.
Effect on target catch
The trawls fished shrimp above 19 mm carapace length equally, while catch rates of shrimp below 15.5–16 mm carapace length in the shorter trawl were more than halved.
Bycatch species
Invertebrates
Reduction technique
Modified ground gear (mobile)
Fishing Gear
Trawls

Shorter trawls improve size selection of northern shrimp

Study Type
Field study in the wild
Location
Skagerrak, Norway
Target catch
Northern shrimp (Pandalus borealis)
Effect on bycatch species
Bycatch of Norway pout was slightly reduced in the shorter trawl.
Effect on target catch
The trawls fished shrimp above 19 mm carapace length equally, while catch rates of shrimp below 15.5–16 mm carapace length in the shorter trawl were more than halved.
Bycatch species
Invertebrates
Reduction technique
Modified ground gear (mobile)
Fishing Gear
Trawls

Shorter trawls improve size selection of northern shrimp

Study Type
Field study in the wild
Location
Skagerrak, Norway
Target catch
Northern shrimp (Pandalus borealis)
Effect on bycatch species
Bycatch of Norway pout was slightly reduced in the shorter trawl.
Effect on target catch
The trawls fished shrimp above 19 mm carapace length equally, while catch rates of shrimp below 15.5–16 mm carapace length in the shorter trawl were more than halved.
Bycatch species
Invertebrates
Reduction technique
Modified ground gear (mobile)
Fishing Gear
Trawls

Unique improved selective fishing traps with adjustable escape gaps for effective fisheries management

Study Type
Field study in the wild
Location
Lagos, Epe Lagoons, Nigeria
Target catch
Bony fish
Effect on bycatch species
Reduced catch of undersized fish
Effect on target catch
Not reported
Bycatch species
Bony Fishes
Reduction technique
Trap-net modification
Fishing Gear
Traps

Unique improved selective fishing traps with adjustable escape gaps for effective fisheries management

Study Type
Field study in the wild
Location
Lagos, Epe Lagoons, Nigeria
Target catch
Bony fish
Effect on bycatch species
Reduced catch of undersized fish
Effect on target catch
Not reported
Bycatch species
Bony Fishes
Reduction technique
Trap-net modification
Fishing Gear
Traps

Unique improved selective fishing traps with adjustable escape gaps for effective fisheries management

Study Type
Field study in the wild
Location
Lagos, Epe Lagoons, Nigeria
Target catch
Bony fish
Effect on bycatch species
Reduced catch of undersized fish
Effect on target catch
Not reported
Bycatch species
Bony Fishes
Reduction technique
Trap-net modification
Fishing Gear
Traps
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