|
|
Electromagnetic deterrents |
Invertebrates |
N/A |
Shrimp tended to do a tail flip in response to some electric pulses and ragworm showed a squirming response independent of the frequency. |
N/A |
Study in the lab |
Determining the safety range of electrical pulses for two benthic invertebrates: brown shrimp (Crangon crangon L.) and ragworm (Alitta virens S.) |
|
Spencer Gulf |
Trawls |
Excluder devices |
Invertebrates |
Reduced capture of giant cuttlefish and blue swimmer crabs by 30-50% |
King prawn |
Catch of target species was not affected |
Field study in the wild |
Mitigating the bycatch of giant cuttlefish Sepia apama and blue swimmer crabs Portunus armatus in an Australian penaeid-trawl fishery |
|
Spencer Gulf |
Trawls |
Excluder devices |
Invertebrates |
Small and large grids reduced number and weight of cuttlefish and crabs |
Prawn |
Small grid caught less prawns compared to large grid and control nets |
Field study in the wild |
Bycatch reduction devices (BRDs) to reduce the incidental catch of cuttlefish in the Spencer Gulf prawn fishery |
|
Lake Maracaibo, Venezuela |
Gillnets |
Deep sets, Sub-surface sets (gillnets) |
Sharks, Skates/Rays, Bony Fishes, Elasmobranchs, Invertebrates |
None, reduced bycach capture rate |
shrimp |
None |
Field study in the wild |
|
|
Venezuela |
Trawls |
Modified ground gear (mobile) |
Sharks, Skates/Rays, Bony Fishes, Elasmobranchs, Invertebrates |
Decrease of 26-32% |
shrimp |
Maintained or increased |
Field study in the wild |
The use of devices to reduce bycatch in Venezuelan shrimp fisheries and the FAO Code of Conduct for Responsible Fishing |
|
North Sea |
Trawls |
Modified ground gear (mobile) |
Bony Fishes, Invertebrates |
Significantly fewer invertebrates; no difference in undersized plaice; significantly fewer undersized sole |
Plaice and sole |
Significantly fewer plaice and sole |
Field study in the wild |
Performance of pulse trawling compared to conventional beam trawling |
|
Isle of Man |
Trawls |
Modified ground gear (mobile) |
Invertebrates |
There was no significant difference in the abundance of bycatch between the traditional and new "Newhaven" dredge design. |
Queen scallop |
The new "Newhaven" dredge caught significantly more queen scallops than the traditional dredge. |
Field study in the wild |
Efficiency and environmental impacts of three different queen scallop fishing gears |
|
Izmir Bay, Turkey |
Gillnets |
Sub-surface sets (gillnets) |
Invertebrates |
Trial 1, experimental net caught 44% fewer crabs and mantis shrimp and 49% fewer murex than control net. Trial 2, experimental net 1 caught 66% fewer crabs, 27% fewer mantis shrimp and 32% fewer murex, while experiemnetal net 2 caught 51% fewer crabs, |
Prawns |
Trial 1, experimental net 1 caught 17% fewer prawns than the control net. Trial 2, experimental net 2 caught 2% fewer prawns than the control net. |
Field study in the wild |
Bycatch reduction in trammel net fishery for prawn (Melicertus kerathurus) by using guarding net in Izmir Bay on Aegean Coast of Turkey |
|
Northern Australia |
Trawls |
Excluder devices |
Elasmobranchs, Invertebrates, Sea Turtles |
Little effect |
Prawns |
Little effect |
Field study in the wild |
The impact of turtle excluder devices and bycatch reduction devices on diverse tropical marine communities in Australia's northern prawn trawl fishery |
|
Northern Australia |
Trawls |
Excluder devices |
Invertebrates |
Downward facing TEDs reduced large sponge catches by 95.9% |
Prawns |
Reduced the proportion of soft and damaged prawns by 63.2% and reduced catches of tiger prawns by 6.3% |
Field study in the wild |
The impact of turtle excluder devices and bycatch reduction devices on diverse tropical marine communities in Australia's northern prawn trawl fishery |
|
Northern Australia |
Trawls |
Excluder devices |
Invertebrates |
Upward facing TED's reduced large sponge catches by 81.6% |
Prawns |
Reduced the proportion of soft and damaged prawns by 35.8% and reduced catches of tiger prawns by 6.3% |
Field study in the wild |
The impact of turtle excluder devices and bycatch reduction devices on diverse tropical marine communities in Australia's northern prawn trawl fishery |
|
Northern Australia |
Trawls |
Excluder devices |
Invertebrates |
Reduced large sponge catches by 85.3% |
Prawns |
Reduced the proportion of soft and damaged prawns by 41.6% and reduced catches of tiger prawns by 6.5% |
Field study in the wild |
The impact of turtle excluder devices and bycatch reduction devices on diverse tropical marine communities in Australia's northern prawn trawl fishery |
|
United Kingdom |
Dredge |
Excluder devices |
Invertebrates |
Reduced likelihood of mortality |
Scallops |
Decreased for deep-dwelling scallops, increased for surface-dwelling species |
Field study in the wild |
Hydrodredge: Reducing the negative impacts of scallop dredging |
|
North Sea |
Trawls |
Electromagnetic deterrents |
Invertebrates |
Reduced bycatch |
shrimp |
Negligible effect |
Field study in the wild |
On electrical fishing for brown shrimp (Crangon crangon) II. Sea trials |
|
North Sea |
Trawls |
Modified ground gear (mobile), Raised footropes |
Invertebrates |
Reduced bycatch |
shrimp |
Negligible effect |
Field study in the wild |
On electrical fishing for brown shrimp (Crangon crangon) II. Sea trials |
|
Australia |
Trawls |
|
Invertebrates |
Reduced bycatch |
Shrimp and scallop |
Reduced catch by about 10% |
Field study in the wild |
Design and assessment of two gear modifications to reduce the benthic impact and fuel intensity of prawn trawling in Australia |
|
Australia |
Trawls |
|
Invertebrates |
Reduced bycatch of starfish but increased bycatch of nektobenthic species |
Shrimp and scallop |
Decreased shrimp catch, increased scallop catch |
Field study in the wild |
Design and assessment of two gear modifications to reduce the benthic impact and fuel intensity of prawn trawling in Australia |
|
Australia |
Trawls |
Excluder devices |
Invertebrates |
Reduced bycatch |
Shrimp and scallop |
Did not affect target catch |
Field study in the wild |
Benefits of square mesh codends in Queenslands scallop and prawn trawl fisheries |
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