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Does the efficiency of a counter-herding device depend on seabed contact?

Permanent lenke
https://hdl.handle.net/10037/18806
DOI
https://doi.org/10.1016/j.fishres.2020.105686
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article.pdf (2.438Mb)
Akseptert manusversjon (PDF)
Dato
2020-07-06
Type
Journal article
Tidsskriftartikkel
Peer reviewed

Forfatter
Melli, Valentina; Krag, Ludvig Ahm; Herrmann, Bent; Karlsen, Junita Diana; Feekings, Jordan
Sammendrag
To prevent unwanted fish bycatch from entering the trawl, we modified a counter-herding device, FLEXSELECT, developed for a Northeast Atlantic Nephrops (Nephrops norvegicus) trawl fishery. FLEXSELECT, which was designed to direct fish away from the trawl by means of sweeping ropes in the herding area, has been shown to be highly effective on both roundfish and flatfish species. However, by adding sweeping elements we could be increasing the benthic impact of trawling. Therefore, in this study we investigated if the effect of FLEXSELECT can be maintained when raising the ropes off the seabed. A reduction in fish bycatch could still be achieved, but the effect of FLEXSELECTraised with respect to the previous design was significantly different for four of the seven species analysed. While for some species the effect was lower, it substantially increased for cod (Gadus morhua), making it highly relevant for the Nephrops fisheries, as well as for other fisheries in needs of avoiding cod catches. The results offer insights regarding species behavioural responses to FLEXSELECTraised, to be used for future developments of counter-herding devices in commercial fisheries without the addition of seabed impact to the baseline gears.
Beskrivelse
Accepted manuscript version, licensed CC BY-NC-ND 4.0.
Forlag
Elsevier
Sitering
Melli V, Krag LA, Herrmann B, Karlsen JD, Feekings J. Does the efficiency of a counter-herding device depend on seabed contact?. Fisheries Research. 2020;230
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  • Artikler, rapporter og annet (Norges fiskerihøgskole) [1054]
© 2020 Elsevier B.V. All rights reserved.

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