Study

An assessment of nets with a square mesh panel as a whiting conservation tool in the Irish Sea Nephrops fishery

  • Published source details Briggs R.P. (1992) An assessment of nets with a square mesh panel as a whiting conservation tool in the Irish Sea Nephrops fishery. Fisheries Research, 13, 133-152

Actions

This study is summarised as evidence for the following.

Action Category

Fit mesh escape panels/windows to a trawl net

Action Link
Marine Fish Conservation
  1. Fit mesh escape panels/windows to a trawl net

    A replicated, paired, controlled study in 1990 of bottom fishing grounds in the Irish Sea, UK (Briggs 1992) reported that diamond mesh prawn trawl codends fitted with a square mesh escape panel caught fewer unwanted and undersized whiting Merlangius merlangus than conventional trawls without an escape panel in a fishery for Norway lobster Nephrops norvegicus. Data were not statistically tested. Overall, trawl codends fitted with a square mesh escape panel retained 84% fewer undersized (<27 cm) whiting than conventional trawls. Trawl nets with a square mesh escape panel caught fewer undersized whiting for every tow (square mesh: 22–714 fish/tow, conventional: 52–2,952 fish/tow), and fewer undersized whiting for every kilogram of Nephrops in 17 of 19 tows (square mesh: 1–28 whiting/kg Nephrops, conventional: 1–70 whiting/kg Nephrops). The overall size composition of both whiting and Nephrops was similar for each trawl design. Data were collected in September and October 1990, from 19 valid paired trawl deployments, 3 to 11.5 h duration, performed under commercial fishing conditions. Two 70 mm diamond mesh trawls were fished simultaneously: one fitted with a square-mesh panel and one without. The square-mesh panel was 75 mm mesh size and 3 m long × 30 meshes in width and fitted to the upper trawl panel (see paper for specifications).

Output references

What Works in Conservation

What Works in Conservation provides expert assessments of the effectiveness of actions, based on summarised evidence, in synopses. Subjects covered so far include amphibians, birds, terrestrial mammals, forests, peatland and control of freshwater invasive species. More are in progress.

More about What Works in Conservation

Download free PDF or purchase
The Conservation Evidence Journal

The Conservation Evidence Journal

An online, free to publish in, open-access journal publishing results from research and projects that test the effectiveness of conservation actions.

Read the latest volume: Volume 18

Go to the CE Journal

Subscribe to our newsletter

Please add your details if you are interested in receiving updates from the Conservation Evidence team about new papers, synopses and opportunities.

Who uses Conservation Evidence?

Meet some of the evidence champions

Endangered Landscape Programme Red List Champion - Arc Kent Wildlife Trust The Rufford Foundation Save the Frogs - Ghana Bern wood Supporting Conservation Leaders National Biodiversity Network Sustainability Dashboard Frog Life The international journey of Conservation - Oryx British trust for ornithology Cool Farm Alliance UNEP AWFA Butterfly Conservation People trust for endangered species Vincet Wildlife Trust