Invertebrates

Displaying 11 - 20 of 27

Electrotrawling: a promising alternative fishing technique warranting further exploration

Study Type: 

Summary study

Location: 

North Sea

Target catch: 

Flatfish

Effect on bycatch species: 

30-50% reduction in fish and 48-73% reduction in benthic discards

Effect on target catch: 

Catches were 65-69% lower compared to conventional trawls

Article: 

Electrotrawling: a promising alternative fishing technique warranting further exploration

Bycatch species: 

Reduction technique: 

Fishing Gear: 

Field Study

Study Type: 

Field study in the wild

Location: 

Lake Maracaibo, Venezuela

Target catch: 

shrimp

Effect on bycatch species: 

None, reduced bycach capture rate

Effect on target catch: 

None

Article: 

Selectivity of three artisanal fishing gears used for the capture of the white shrimp, Litopenaeus schmitti, in the Bay of El Tablazo, Zulia State, Venezuela

Bycatch species: 

Reduction technique: 

Fishing Gear: 

Field Study 736

Study Type: 

Field study in the wild

Location: 

Isle of Man

Target catch: 

Queen scallop

Effect on bycatch species: 

There was no significant difference in the abundance of bycatch between the traditional and new "Newhaven" dredge design.

Effect on target catch: 

The new "Newhaven" dredge caught significantly more queen scallops than the traditional dredge.

Article: 

Efficiency and environmental impacts of three different queen scallop fishing gears

Bycatch species: 

Reduction technique: 

Fishing Gear: 

Corals, Sponges, and Other Benthic Invertebrates

Species: 

Corals, Sponges, and Other Benthic Invertebrates

Non-target benthic invertebrates are caught as bycatch in huge volumes, but precise numbers are not available.

Distribution: 

Wordwide, in suitable habitats

Population: 

Variable, but largely unknown
There are no related field studies for this citation.
Photo: David Obura

IUCN Status: 

Unknown

Type: 

Invertebrate

Bycatch Threat: 

Bottom trawls, dredges, gillnets

Field Study 371

Study Type: 

Field study in the wild

Location: 

Izmir Bay, Turkey

Target catch: 

Prawns

Effect on bycatch species: 

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,

Effect on target catch: 

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.

Article: 

Bycatch reduction in trammel net fishery for prawn (Melicertus kerathurus) by using guarding net in Izmir Bay on Aegean Coast of Turkey

Bycatch species: 

Reduction technique: 

Fishing Gear: 

Field Study 325

Study Type: 

Field study in the wild

Location: 

Northern Australia

Target catch: 

Prawns

Effect on bycatch species: 

Downward facing TEDs reduced large sponge catches by 95.9%

Effect on target catch: 

Reduced the proportion of soft and damaged prawns by 63.2% and reduced catches of tiger prawns by 6.3%

Article: 

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

Bycatch species: 

Reduction technique: 

Fishing Gear: 

Field Study 324

Study Type: 

Field study in the wild

Location: 

Northern Australia

Target catch: 

Prawns

Effect on bycatch species: 

Upward facing TED's reduced large sponge catches by 81.6%

Effect on target catch: 

Reduced the proportion of soft and damaged prawns by 35.8% and reduced catches of tiger prawns by 6.3%

Article: 

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

Bycatch species: 

Reduction technique: 

Fishing Gear: 

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