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The efficiency of sieve‐panels for bycatch separation in Nephrops trawls

Study Type
Field study in the wild
Location
Skagerrak, Norway
Target catch
Norway lobster (Nephrops norvegicus)
Effect on bycatch species
Bycatch of roundfish and flatfish was low
Effect on target catch
Optimal catch size of large Nephrops was too low for commercial use
Bycatch species
Bony Fishes
Reduction technique
Excluder devices
Fishing Gear
Trawls

The efficiency of sieve‐panels for bycatch separation in Nephrops trawls

Study Type
Field study in the wild
Location
Skagerrak, Norway
Target catch
Norway lobster (Nephrops norvegicus)
Effect on bycatch species
Bycatch of roundfish and flatfish was low
Effect on target catch
Optimal catch size of large Nephrops was too low for commercial use
Bycatch species
Bony Fishes
Reduction technique
Excluder devices
Fishing Gear
Trawls

Increasing the Selectivity of the Stone Crab Menippe mercenaria Trap by the Addition of a Cull Ring

Study Type
Field study in the wild
Location
Florida, USA
Target catch
Stone crab (Menippe mercenaria)
Effect on bycatch species
Decreased catch of bycatch species and pre-recruit stone crabs
Effect on target catch
No effect
Bycatch species
Bony Fishes
Stone crab (Menippe. mercenaria)
Reduction technique
Trap-net modification
Fishing Gear
Traps

Increasing the Selectivity of the Stone Crab Menippe mercenaria Trap by the Addition of a Cull Ring

Study Type
Field study in the wild
Location
Florida, USA
Target catch
Stone crab (Menippe mercenaria)
Effect on bycatch species
Decreased catch of bycatch species and pre-recruit stone crabs
Effect on target catch
No effect
Bycatch species
Bony Fishes
Stone crab (Menippe. mercenaria)
Reduction technique
Trap-net modification
Fishing Gear
Traps

Increasing the Selectivity of the Stone Crab Menippe mercenaria Trap by the Addition of a Cull Ring

Study Type
Field study in the wild
Location
Florida, USA
Target catch
Stone crab (Menippe mercenaria)
Effect on bycatch species
Decreased catch of bycatch species and pre-recruit stone crabs
Effect on target catch
No effect
Bycatch species
Bony Fishes
Stone crab (Menippe. mercenaria)
Reduction technique
Trap-net modification
Fishing Gear
Traps

Increasing the Selectivity of the Stone Crab Menippe mercenaria Trap by the Addition of a Cull Ring

Study Type
Field study in the wild
Location
Florida, USA
Target catch
Stone crab (Menippe mercenaria)
Effect on bycatch species
Decreased catch of bycatch species and pre-recruit stone crabs
Effect on target catch
No effect
Bycatch species
Bony Fishes
Stone crab (Menippe. mercenaria)
Reduction technique
Trap-net modification
Fishing Gear
Traps

Cumulative selectivity benefits of increasing mesh size and using escape gaps in Australian Portunus armatus traps

Study Type
Field study in the wild
Location
Southeastern Australia
Target catch
Blue swimmer crab (P. armatus)
Effect on bycatch species
87% reduction in yellowfin bream, 84% reduction in undersized crab
Effect on target catch
No effect
Bycatch species
Bony Fishes
Invertebrates
Reduction technique
Trap-net modification
Fishing Gear
Traps

Cumulative selectivity benefits of increasing mesh size and using escape gaps in Australian Portunus armatus traps

Study Type
Field study in the wild
Location
Southeastern Australia
Target catch
Blue swimmer crab (P. armatus)
Effect on bycatch species
87% reduction in yellowfin bream, 84% reduction in undersized crab
Effect on target catch
No effect
Bycatch species
Bony Fishes
Invertebrates
Reduction technique
Trap-net modification
Fishing Gear
Traps

Cumulative selectivity benefits of increasing mesh size and using escape gaps in Australian Portunus armatus traps

Study Type
Field study in the wild
Location
Southeastern Australia
Target catch
Blue swimmer crab (P. armatus)
Effect on bycatch species
87% reduction in yellowfin bream, 84% reduction in undersized crab
Effect on target catch
No effect
Bycatch species
Bony Fishes
Invertebrates
Reduction technique
Trap-net modification
Fishing Gear
Traps

Cumulative selectivity benefits of increasing mesh size and using escape gaps in Australian Portunus armatus traps

Study Type
Field study in the wild
Location
Southeastern Australia
Target catch
Blue swimmer crab (P. armatus)
Effect on bycatch species
87% reduction in yellowfin bream, 84% reduction in undersized crab
Effect on target catch
No effect
Bycatch species
Bony Fishes
Invertebrates
Reduction technique
Trap-net modification
Fishing Gear
Traps

Fishery-specific solutions to seabird bycatch in the U.S. West Coast sablefish fishery

Study Type
Field study in the wild
Location
U.S. West Coast
Target catch
Sablefish (Anoplopoma fimbria)
Effect on bycatch species
Albatross attacked baited hooks on floated longlines at significantly higher rates than non-floated longlines, especially beyond the aerial extent of bird scaring lines. Additionally, night setting resulted in significant decreases in albatross bycatch.
Effect on target catch
Scaring lines had no effect on target catch. Night setting increased average retained catch by more than 40%.
Bycatch species
Phoebastria nigripes (Black-footed albatross)
Reduction technique
Bird-scaring devices
Night sets
Fishing Gear
Hooks-and-Lines

Fishery-specific solutions to seabird bycatch in the U.S. West Coast sablefish fishery

Study Type
Field study in the wild
Location
U.S. West Coast
Target catch
Sablefish (Anoplopoma fimbria)
Effect on bycatch species
Albatross attacked baited hooks on floated longlines at significantly higher rates than non-floated longlines, especially beyond the aerial extent of bird scaring lines. Additionally, night setting resulted in significant decreases in albatross bycatch.
Effect on target catch
Scaring lines had no effect on target catch. Night setting increased average retained catch by more than 40%.
Bycatch species
Phoebastria nigripes (Black-footed albatross)
Reduction technique
Bird-scaring devices
Night sets
Fishing Gear
Hooks-and-Lines

Fishery-specific solutions to seabird bycatch in the U.S. West Coast sablefish fishery

Study Type
Field study in the wild
Location
U.S. West Coast
Target catch
Sablefish (Anoplopoma fimbria)
Effect on bycatch species
Albatross attacked baited hooks on floated longlines at significantly higher rates than non-floated longlines, especially beyond the aerial extent of bird scaring lines. Additionally, night setting resulted in significant decreases in albatross bycatch.
Effect on target catch
Scaring lines had no effect on target catch. Night setting increased average retained catch by more than 40%.
Bycatch species
Phoebastria nigripes (Black-footed albatross)
Reduction technique
Bird-scaring devices
Night sets
Fishing Gear
Hooks-and-Lines

Fishery-specific solutions to seabird bycatch in the U.S. West Coast sablefish fishery

Study Type
Field study in the wild
Location
U.S. West Coast
Target catch
Sablefish (Anoplopoma fimbria)
Effect on bycatch species
Albatross attacked baited hooks on floated longlines at significantly higher rates than non-floated longlines, especially beyond the aerial extent of bird scaring lines. Additionally, night setting resulted in significant decreases in albatross bycatch.
Effect on target catch
Scaring lines had no effect on target catch. Night setting increased average retained catch by more than 40%.
Bycatch species
Phoebastria nigripes (Black-footed albatross)
Reduction technique
Bird-scaring devices
Night sets
Fishing Gear
Hooks-and-Lines

Assessing the importance of net colour as a seabird bycatch mitigation measure in gillnet fishing

Study Type
Study in the lab
Location
Melbourne Zoo, Australia
Target catch
N/A
Effect on bycatch species
Orange colored monofilament resulted in lower collision rates with a gillnet mimic versus green and clear monofilament
Effect on target catch
Not tested
Bycatch species
Eudyptula minor (Little penguin)
Reduction technique
Visual deterrents
Fishing Gear
Gillnets

Assessing the importance of net colour as a seabird bycatch mitigation measure in gillnet fishing

Study Type
Study in the lab
Location
Melbourne Zoo, Australia
Target catch
N/A
Effect on bycatch species
Orange colored monofilament resulted in lower collision rates with a gillnet mimic versus green and clear monofilament
Effect on target catch
Not tested
Bycatch species
Eudyptula minor (Little penguin)
Reduction technique
Visual deterrents
Fishing Gear
Gillnets

Assessing the importance of net colour as a seabird bycatch mitigation measure in gillnet fishing

Study Type
Study in the lab
Location
Melbourne Zoo, Australia
Target catch
N/A
Effect on bycatch species
Orange colored monofilament resulted in lower collision rates with a gillnet mimic versus green and clear monofilament
Effect on target catch
Not tested
Bycatch species
Eudyptula minor (Little penguin)
Reduction technique
Visual deterrents
Fishing Gear
Gillnets
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