01466nam a2200205Ia 4500 CTU_190068 210402s9999 xx 000 0 und d 639 L836 Løkkeborg, Svein Impacts of trawling and scallop dredging on benthic habitats and communities Svein Løkkeborg Rome Food and Agirculture Organization of the United Nations 2005 Over the last two decades, concerns about the impact of towed fishing gears such as trawls and dredges on benthic habitats and organisms have increased. This publication reviews the most recent experimental studies of the impact of towed fishing gears on benthic communities. Otter trawls, beam trawls and scallop dredges are likely to have different physical impacts on the sea bed owing to their different catching techniques. The most noticeable physical effect of otter trawling is the furrow created by the doors. Beam trawling and scallop dredging cause a flattening of irregular bottom topography by eliminating natural features. The long-term effects of fishing activities have not been investigated although several studies provide clear evidence of short-term consequences. Trawls and trawling,Lưới và đánh bắt cá Environmental aspects,Khía cạnh môi trường Giang Trung tâm Học liệu Trường Đại học Cần Thơ