Cristin-resultat-ID: 2009490
Sist endret: 27. juni 2022, 13:25
NVI-rapporteringsår: 2022
Resultat
Vitenskapelig artikkel
2022

A new method for estimating length-dependent capture modes in gillnets: A case study in the Danish cod (Gadus morhua) fishery

Bidragsytere:
  • Esther Savina
  • Bent Herrmann
  • Rikke P. Frandsen og
  • Ludvig Ahm Krag

Tidsskrift

ICES Journal of Marine Science
ISSN 1054-3139
e-ISSN 1095-9289
NVI-nivå 2

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2022
Publisert online: 2022
Volum: 79
Hefte: 2
Sider: 373 - 381
Open Access

Importkilder

Scopus-ID: 2-s2.0-85127274447

Beskrivelse Beskrivelse

Tittel

A new method for estimating length-dependent capture modes in gillnets: A case study in the Danish cod (Gadus morhua) fishery

Sammendrag

Gillnets are used world-wide for harvesting groundfish and pelagic species at sea and in freshwater. Little consideration has been given to how fish are caught in gillnets, even though the capture mode provides valuable information for understanding gear catchability. This paper describes a new method of estimating the length-dependent fish capture modes in gillnets. Using this method, we investigated the length-dependent capture modes for cod (Gadus morhua) in commercial monofilament nylon gillnets. Cod is a target species for several fisheries in the Northern Atlantic. This is the first time the capture mode was formally related to fish size with a direct representation of the experimental observations. The results demonstrated that gillnets are clearly designed for gilling. However, capture modes were size dependent, with small fish being caught by the mouth and larger fish by the maxillary. The application of the method is relevant when used by gear technologists to evaluate different gear characteristics to improve size or species selectivity. Changing the hanging ratio, for instance, or replacing nylon twine by thicker biodegradable material may considerably change the capture modes and their effect on gear efficiency.

Bidragsytere

Esther Savina

  • Tilknyttet:
    Forfatter
    ved Danmarks Tekniske Universitet

Bent Herrmann

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

Rikke P. Frandsen

  • Tilknyttet:
    Forfatter
    ved Danmarks Tekniske Universitet

Ludvig Ahm Krag

  • Tilknyttet:
    Forfatter
    ved Danmarks Tekniske Universitet
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