Cristin-resultat-ID: 1618687
Sist endret: 15. november 2018, 22:43
NVI-rapporteringsår: 2018
Resultat
Vitenskapelig artikkel
2018

Size selection of cod (Gadus morhua) and haddock (Melanogrammus aeglefinus) in the Northeast Atlantic bottom trawl fishery with a newly developed double steel grid system

Bidragsytere:
  • Roger B. Larsen
  • Bent Herrmann
  • Manu Berrondo Sistiaga
  • Eduardo Grimaldo
  • Ivan Tatone og
  • Jesse Brinkhof

Tidsskrift

Fisheries Research
ISSN 0165-7836
e-ISSN 1872-6763
NVI-nivå 1

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2018
Publisert online: 2018
Trykket: 2018
Volum: 201
Sider: 120 - 130
Open Access

Importkilder

Scopus-ID: 2-s2.0-85041560365

Beskrivelse Beskrivelse

Tittel

Size selection of cod (Gadus morhua) and haddock (Melanogrammus aeglefinus) in the Northeast Atlantic bottom trawl fishery with a newly developed double steel grid system

Sammendrag

In recent years, Norwegian fishermen have reported problems with fish accumulation in front of the mandatory sorting grids (Sort-X, Sort-V, and Flexigrid). These problems are associated with high fish entry rates and low water flow through the grid sections. In this study, we replaced the lifting panel in the original design of a sorting grid section (Sort-V) by another steel grid (“lower grid”) in order to improve water flow and increase sorting area. Two different inclination angles of this new additional “lower grid” were tested. The results demonstrated that both the lower grid and the main grid contributed to the release of cod and haddock. However, the release efficiency of the lower grid was low compared to that of the main grid. A larger proportion of fish contacted at least one of the grids with the lower grid set at 40° compared to at 35°. The new double grid was found to release significantly more haddock between 38 and 50 cm long than the mandatory Flexigrid. For cod, the sorting system was at least as good as the Flexigrid at releasing undersized fish. Thus, the new double grid system represents a potential alternative to the Flexigrid. Although the Sort-V single grid releases significantly more undersized cod and haddock than the new double grid system, it also releases a significantly higher proportion of the targeted commercial sizes.

Bidragsytere

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

Manu Sistiaga

Bidragsyterens navn vises på dette resultatet som Manu Berrondo Sistiaga
  • Tilknyttet:
    Forfatter
    ved Fiskeri og ny biomarin industri ved SINTEF Ocean

Eduardo Enrique Grimaldo Vela

Bidragsyterens navn vises på dette resultatet som Eduardo Grimaldo
  • Tilknyttet:
    Forfatter
    ved Fiskeri og ny biomarin industri ved SINTEF Ocean

Ivan Tatone

  • Tilknyttet:
    Forfatter
    ved Norges fiskerihøgskole ved UiT Norges arktiske universitet
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