Catch yield and selectivity of a modified scallop dredge to reduce seabed impact

Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

Fersiynau electronig

Dangosydd eitem ddigidol (DOI)

  • Mairi Fenton
    Heriot-Watt University
  • Claire Szostek
    College of Life and Environmental Sciences, University of Exeter, Penryn Campus, Penryn, 9 TR10 9EZ, UK.
  • Adam Delargy
    University of Massachusetts, Dartmouth
  • Andrew F Johnson
    Heriot-Watt University
  • Michel J Kaiser
    Heriot-Watt University
  • Hilmar Hinz
    Mediterranean Institute for Advanced Studies (IMEDEA)
  • Natalie Hold
  • Marija Sciberras
    Heriot-Watt University
Global scallop fisheries are economically important but are associated with environmental impacts to seabed communities resulting from the direct physical contact of the fishing gear with the seabed. Gear modifications attempting to reduce this contact must be economically feasible such that the catch numbers for the target species is maintained or increased. This study investigated the outcome of reducing seabed contact on retained catch of scallops and bycatch by the addition of skids to the bottom of the collecting bag of scallop dredges. We used a paired control experimental design to investigate the impact of the gear modification in different habitat types. The modified skid dredge generally caught more marketable scallops per unit area fished compared with the standard dredge (+5%). However, the skid dredge also retained more bycatch (+11%) and more undersize scallops (+16%). The performance of the two dredges was habitat specific which indicates the importance of adjusting management measures in relation to habitat type. To realize the potential environmental benefits associated with the improvement in catchability of this gear modification, further gear modification is required to reduce the catch of undersize scallops and bycatch. Furthermore we advocate that technical gear innovations in scallop dredging need to be part of a comprehensive and effective fisheries management system. [Abstract copyright: Copyright: © 2024 Fenton et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.]

Allweddeiriau

Iaith wreiddiolSaesneg
Tudalennau (o-i)e0302225
CyfnodolynPLoS ONE
Cyfrol19
Rhif y cyfnodolyn5
Dyddiad ar-lein cynnar13 Mai 2024
Dynodwyr Gwrthrych Digidol (DOIs)
StatwsCyhoeddwyd - 13 Mai 2024
Gweld graff cysylltiadau