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Amity Net Grid
The amity net grid is a selective device designed to separate nephrops from fish. -
Towing speed
In some situations a change in towing speed can dramatically change the composition of the catch. -
Gear Size
Reducing the physical size of the whole gear or just part of the gear to reduce unwanted by-catch and be able to handle the gear more efficiently. -
Cefas Net Grid
The Cefas Net Grid is a selective device designed to separate nephrops from fish. -
Diamond Mesh Size
Most fishing gear is made of netting with diamond shaped meshes, this gives the gear flexibility and a certain amount of stretch. -
Sep-Nep codend
The Sep-Nep is an inclined panel of diamond netting to sieve the nephrops into the lower chamber and direct the fish into the upper chamber. -
Fish Stimulation
Fish stimulation being used as a selective device is still a relatively new concept. It is being trialled using a light, sound or electric pulses. -
SELTRA Box - Diamond mesh
The SELTRA box is a four panel extension section with a top panel of either large diamond mesh or large square mesh to encourage small fish to escape. -
SELTRA Box - Square mesh panel
The SELTRA box is a four panel extension section with a top panel of either large diamond mesh or large square mesh to encourage small fish to escape. -
Headline Height
A trawl or static net where the gear has been redesigned to keep the headline (top of the net) low to prevent the capture of high swimming species. -
Ring Size
The ring size of scallop dredges can be used as a selectivity measure to release scallops below a certain size. -
Coverless Trawls
A coverless trawl has the top panel of the net cut back so that the headline and footrope are of similar length.