On electrical fishing for brown shrimp (Crangon crangon) II. Sea trials

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.
Field Studies:

Location	Fishing gear	Reduction technique	Bycatch species	Effect on bycatch species	Catch	Effect on target catch	Type
North Sea	Trawls	Modified ground gear	Bony Fishes	Reduced bycatch	shrimp	Negligible effect	In the wild
North Sea	Trawls	Modified ground gear	Invertebrates	Reduced bycatch	shrimp	Negligible effect	In the wild
North Sea	Trawls	Electromagnetic deterrents	Bony Fishes	Reduced bycatch	shrimp	Negligible effect	In the wild
North Sea	Trawls	Electromagnetic deterrents	Invertebrates	Reduced bycatch	shrimp	Negligible effect	In the wild