Cristin-resultat-ID: 1970840
Sist endret: 2. februar 2022, 15:33
NVI-rapporteringsår: 2021
Resultat
Vitenskapelig artikkel
2021

Make it simpler and better: T90 codend improves size selectivity and catch efficiency compared with the grid-and-diamond mesh codend in the Northeast Atlantic bottom trawl fishery for gadoids

Bidragsytere:
  • Jesse Brinkhof
  • Roger B. Larsen og
  • Bent Herrmann

Tidsskrift

Ocean and Coastal Management
ISSN 0964-5691
e-ISSN 1873-524X
NVI-nivå 1

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2021
Publisert online: 2021
Trykket: 2022
Volum: 217
Artikkelnummer: 106002
Open Access

Importkilder

Scopus-ID: 2-s2.0-85120695023

Beskrivelse Beskrivelse

Tittel

Make it simpler and better: T90 codend improves size selectivity and catch efficiency compared with the grid-and-diamond mesh codend in the Northeast Atlantic bottom trawl fishery for gadoids

Sammendrag

The use of a sorting grid followed by a size-selective codend with minimum 130 mm mesh size is compulsory in the Northeast Atlantic demersal trawl fishery targeting cod (Gadus morhua), haddock (Melanogrammus aeglefinus), and saithe (Polachius virens). However, sorting grids cause some disadvantages, which possibly can be solved by removing the grid and improving codend selectivity, thus making the construction simpler. This study compared the size selectivity and catch efficiency of two diamond-meshed codends turned 90° (T90) with two different mesh sizes (135 and 145 mm) with those of a sorting grid followed by a diamond-mesh codend. The results showed that the T90 145-mm codend caught 7.0% fewer cod and 8.2% fewer saithe above the minimum reference length (MRL) compared with the compulsory configuration. By contrast, compared with the compulsory configuration, the T90 135-mm codend increased the capture of cod above the MRL by 4.4%, from 80.4% to 84.8%, of haddock by 14.1% from 45.2% to 59.3%, and of saithe by 16.0% from 59.7% to 75.7%. The increased catch of fish below the MRL was minor and far below the regulated limits. Our results demonstrate that a simple T90 codend represents an advantageous alternative to the more complex selection system with a rigid sorting grid currently enforced in the Northeast Atlantic demersal trawl fishery.

Bidragsytere

Jesse Vallevik Brinkhof

Bidragsyterens navn vises på dette resultatet som Jesse Brinkhof
  • Tilknyttet:
    Forfatter
    ved Norges fiskerihøgskole ved UiT Norges arktiske universitet
Aktiv cristin-person

Roger Bertram Larsen

Bidragsyterens navn vises på dette resultatet som Roger B. Larsen
  • Tilknyttet:
    Forfatter
    ved Norges fiskerihøgskole ved UiT Norges arktiske universitet

Bent Herrmann

  • Tilknyttet:
    Forfatter
    ved Norges fiskerihøgskole ved UiT Norges arktiske universitet
  • Tilknyttet:
    Forfatter
    ved Fiskeri og ny biomarin industri ved SINTEF Ocean
  • Tilknyttet:
    Forfatter
    ved Danmarks Tekniske Universitet
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