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ICES Journal of Marine Science: Journal du Conseil 1992 49(1):5-11; doi:10.1093/icesjms/49.1.5
© 1992 by ICES/CIEM International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer
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Direct effects of beamtrawling on macrofauna in a sandy sediment in the southern North Sea

M. J. N. Bergman and M. Hup

Netherlands Institute for Sea Research (NIOZ) P.O. Box 59, 1790 AB Den Burg Texel, The Netherlands

The presence of certain species of benthic infauna in catches from a beamtrawl indicated that tickler chains and the ground chain can scrape off successive layers of sediment and reach at least 6 cm into the sediment. Direct effects of beamtrawling on benthic species in the North Sea were determined by comparing faunal abundance before and after commercial beamtrawling on a hard-sandy sediment. In autumn 1989 three-fold trawling of the experimental area resulted in a decrease in density (10–65%) of a number of species of echinoderms, polychaetes and molluscs.


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