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Het OWA, het open archief van het Waterbouwkundig Laboratorium heeft tot doel alle vrij toegankelijke onderzoeksresultaten van dit instituut in digitale vorm aan te bieden. Op die manier wil het de zichtbaarheid, verspreiding en gebruik van deze onderzoeksresultaten, alsook de wetenschappelijke communicatie maximaal bevorderen.

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On electrical fishing for brown shrimp (Crangon crangon): II. Sea trials Polet, H.; Delanghe, F.; Verschoore, R. (2005). On electrical fishing for brown shrimp (Crangon crangon): II. Sea trials. Fish. Res. 72(1): 13-27. dx.doi.org/10.1016/j.fishres.2004.10.015 In: Fisheries Research. Elsevier: Amsterdam. ISSN 0165-7836; e-ISSN 1872-6763, meer

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Beschikbaar in	Auteurs
VLIZ: Open Marine Archive 238949 [ download pdf ]

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Trefwoorden

Beam trawls (bottom) By catch Catching methods > Electric fishing Electric pulses Equipment > Fishery industry equipment > Fishing gear Fisheries > Shellfish fisheries > Crustacean fisheries > Shrimp fisheries Gear selectivity Management > Resource management > Fishery management Mortality causes Nets > Fishing gear > Fishing nets > Trawl nets Crangon crangon (Linnaeus, 1758) [WoRMS]; Crangon crangon (Linnaeus, 1758) [WoRMS] ANE, Noordzee [Marine Regions] Marien/Kust

Author keywords

brown shrimp; beam trawl; North Sea; discard reduction; electric pulses

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Auteurs		Top
Polet, H., meer Delanghe, F., meer Verschoore, R.

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Abstract

To find ways of reducing the by-catch in the North Sea brown shrimp (Crangon crangon) fishery, experiments were carried out with electric pulses. The basic idea was to selectively invoke a startle response in shrimp without stimulating any by-catch species. A selective groundrope could then be used in combination with electric pulses to obtain catch separation. Sea trials with the electro-net showed that the raised groundrope created an escape route for most fish species regularly caught in shrimp trawls, while the electric field made the shrimps tail-flip high enough to be caught. The electro-net with raised groundrope and small meshes in the top panel gave satisfactory results. The losses of commercial shrimp catches were negligible. Part of the undersized commercial fish catch could escape and non-commercial fish and invertebrates were caught in lower numbers compared to the standard gear. Electric fishing can be a practical alternative to the standard shrimp trawl and could be an acceptable balance between the economic interests of the fishermen and the ecological demands of the marine ecosystem.

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