Relative selectivity in trawl, longline and gillnet fisheries for cod and haddock

  • Published source details Huse I., Løkkeborg S. & Soldal A.V. (2000) Relative selectivity in trawl, longline and gillnet fisheries for cod and haddock. ICES Journal of Marine Science, 57, 1271-1282


This study is summarised as evidence for the following.

Action Category

Use an alternative commercial fishing method

Action Link
Marine Fish Conservation
  1. Use an alternative commercial fishing method

    A replicated study in 1996 of a seabed area in the Norwegian Sea, off northern Norway (Huse et al. 2000) found that fishing using gillnets reduced the capture of small, unwanted cod Gadus morhua and haddock Melanogrammus aeglefinus compared to trawling or longlining. In two of two trials, gillnets caught larger cod than trawls or longlines (gillnet: 82–86 cm, trawl: 67-69 cm, longline: 68–69 cm). In addition, gillnets caught fewer cod compared to trawls in both cases, and similar amounts in one case and more in one case compared to longlines (gillnet: 1,657–3,391 kg, trawl: 3,238–4,096 kg, longline: 1,773–1,754 kg) (data were not tested for statistical significance). Trawls captured larger haddock than longlines in one case, and smaller in one case (trawl: 53 cm, longline: 51–55 cm,). Fewer haddock were caught in longlines compared to trawls in both cases (longline: 665–1,055 kg, trawl: 1,153–1,973 kg) (data not tested for significance). Three fishing vessels tested a different gear type in one area of 10 × 40 nautical miles in February 1996 over six days. Depths were between 227–259 m. The gillnetter fished nine fleets of 186 mm mesh and two fleets of 200 mm mesh. The longliner used squid and mackerel bait on fleets of 6,300 or 8,230 hooks; 26 fleets were fished. The trawler fishes a standard trawl with a twin codend and 140 mm mesh size.

    (Summarised by: Natasha Taylor)

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, 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

Discover more on our blog

Our blog contains the latest news and updates from the Conservation Evidence team, the Conservation Evidence Journal, and our global partners in evidence-based conservation.

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