Direct effects of beam trawling on macrofauna in sandy areas off the Dutch coast
Bergman, M.J.N.; van Santbrink, J.W. (1994). Direct effects of beam trawling on macrofauna in sandy areas off the Dutch coast. BEON Rapport = BEON-report(13). [S.n.]: [s.l.].
Part of: BEON Rapport = BEON-report. Programma Bureau BEON: Den Haag. ISSN 0924-6576, more
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| Authors | | Top |
- Bergman, M.J.N.
- van Santbrink, J.W.
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| Abstract |
Direct effects of trawling with commercial 4m beam trawls on the abundance of benthic species in areas with sandy sediments off the Dutch coast were studied by comparing densities before and after trawling. Various sampling gears were used, including a benthos dredge (Triple-D) developed especially for this IMPACT-project For a number of species, the mortality due to trawling a study area twice, could be estimated. For these species, mortality was found to be very variable, and was estimated for fish as 2-70% of the numbers initially present on the area, for echinoderms as 0-44%, for molluscs as 0-84%, for crustaceans as 0-82%, and for annelids as 0-24%. Dab, Limanda limanda, was a predominant scavenger on damaged or exposed fauna on a recently trawled seabed. |
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