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Summary:Modified ground gear in the North Sea brown shrimp (Crangon crangon) bottom trawl fishery utilized electromagnetic deterrents and a raised groundrope to obtain catch separation. Preliminary results of the modified gear indicate a selective effect on fish and invertebrate species. Bycatch of various fish and invertebrate species were decreased with a negligible effect on shrimp catch. The results showed great promise, but the authors indicate more testing is necessary.