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Electrotrawling can improve the sustainability of the bottom trawl fishery for sole: a review of the evidence
Rijnsdorp, A.D.; Boute, P.G.; Tiano, J.C.; de Haan, D.; Kraan, M.; Polet, H.; Schram, E.; Soetaert, M.; Steins, N.A.; Lankheet, M.J.; Soetaert, K. (2024). Electrotrawling can improve the sustainability of the bottom trawl fishery for sole: a review of the evidence. Rev. Fish Biol. Fish. 34(3): 959-993. https://dx.doi.org/10.1007/s11160-024-09867-x
In: Reviews in Fish Biology and Fisheries. Chapman & Hall: London. ISSN 0960-3166; e-ISSN 1573-5184
Peer reviewed article  
Available in  Authors 
Keywords
    Aquatic communities > Benthos
    Sea floor
    ANE, North Sea [Marine Regions]
    Marine/Coastal
Author keywords
    Pulse trawl · Beam trawl · Ecological impact · Discards  · Governance · Socio-economy · Fuel use
Authors  Top 
  • Rijnsdorp, A.D.
  • Boute, P.G.
  • Tiano, J.C.
  • de Haan, D.
  • Kraan, M.
  • Polet, H.
  • Schram, E.
  • Soetaert, M.
  • Steins, N.A.
  • Lankheet, M.J.
  • Soetaert, K.
Abstract
    Between 2009 and 2021 almost the complete beam trawl fleet of the Netherlands switched from conventional beam trawls (BT) to pulse trawls (PT) using electrical stimulation to catch sole, Solea solea. Electric fishing, being banned in the EU in 1988, was made possible in 2006 under a derogation. Over the years stakeholders expressed concern about ecosystem effects. Here we review the research conducted. PT improved the selectivity of the fishery and reduced the ecological side effects. PT caught more sole per hour fishing but less discards and benthos than BT. The transition to PT reduced the surface area swept (lower towing speed), sediment depth of disturbance and associated benthic impacts, as well as fuel consumption. Laboratory experiments with 9 fish and 17 benthic invertebrate species showed that exposure to a commercial bipolar pulse stimulus did not result in harmful effects except in cod. Autopsy of cod sampled from PT revealed that 40% had an internal injury. Injury rates in other roundfish species was low (< 2%) and absent in flatfish. Electrical-induced impacts on biogeochemistry were not observed. The transition increased competition with other fishers which fed the resentment against PT. Governance arrangements under which the number of temporary licenses expanded, undermined legitimacy of the gear, resulting in a ban in 2021. Although questions about the ecological impact of electrical stimulation remain, adverse effects are considered negligible in comparison with the benefits
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