Direct effects of beamtrawling on macrofauna in a sandy sediment in the southern North Sea
Bergman, M.J. N.; Hup, M. (1992). Direct effects of beamtrawling on macrofauna in a sandy sediment in the southern North Sea. ICES J. Mar. Sci./J. Cons. int. Explor. Mer 49(1): 5-11. http://dx.doi.org/10.1093/icesjms/49.1.5
In: ICES Journal of Marine Science. Academic Press: London. ISSN 1054-3139; e-ISSN 1095-9289, meer
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| Abstract |
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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