Trap-net modification

Traps are modified to reduce the incidental capture of bycatch species. This can be done through measures such as reducing the trap opening size, bent-tunnel openings etc. (Favaro et al. 2012).

Displaying 1 - 10 of 14

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

Article:

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

Bycatch species:

Reduction technique:

Trap-net modification

Fishing Gear:

Traps

Performance of industry-developed escape gaps in Australian Portunus pelagicus traps

Study Type:

Field study in the wild

Location:

Southeastern Australia

Target catch:

Blue swimmer crab (P. pelagicus)

Effect on bycatch species:

51-100% reduction of juvenile crab

Effect on target catch:

No effect

Article:

Performance of industry-developed escape gaps in Australian Portunus pelagicus traps

Bycatch species:

Invertebrates

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

Article:

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

Bycatch species:

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

Article:

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

Bycatch species:

Bony Fishes

Reduction technique:

Trap-net modification

Fishing Gear:

Traps

Optimizing mesh size with escape gaps in a dual-species portunid-trap fishery

Study Type:

Field study in the wild

Location:

Southeastern Australia

Target catch:

giant mud crabs (Scylla serrata), blue swimmer crabs (Portunus armatus)

Effect on bycatch species:

91-mm traps retained significantly fewer (by 42%) undersized P. armatus and A. australis. In the second experiment, fewer undersized S. serrata, P. armatus, and A. australis were retained in all larger meshed traps, and in all traps with escape gaps.

Effect on target catch:

No effect

Article:

Optimizing mesh size with escape gaps in a dual-species portunid-trap fishery

Bycatch species:

Reduction technique:

Trap-net modification

Fishing Gear:

Traps

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

Study Type:

Field study in the 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.