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  • 4 Panel Cod-end

    By constructing a 4 panel cod-end, it allows the cod-end to remain more open and increases the flow of water, allowing the fish more space to swim.
    Selective device

  • Acoustic deterrents

    An acoustic deterrent is a device that emits pulses of high frequency sound to deter cetaceans from approaching fishing gear.
    Selective device

  • Amity Net Grid

    The amity net grid is a selective device designed to separate nephrops from fish.
    Selective device

  • Benthic Panel

    A benthic panel is a small panel of square mesh or large diamond mesh inserted in the bottom panel of a trawl.
    Selective device

  • Benthos Release Panel

    A Benthos or Benthic release panel is a panel of larger diamond mesh or square mesh netting fitted into the lower panel of a trawl.
    Selective device

  • Box Trawl

    A selective box trawl is made up of 4 panels of netting with these 4 panels carried right down to a 4 panel cod-end.
    Selective device

  • Cefas Net Grid

    The Cefas Net Grid is a selective device designed to separate nephrops from fish.
    Selective device

  • Coverless Trawls

    A coverless trawl has the top panel of the net cut back so that the headline and footrope are of similar length.
    Selective device

  • 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.
    Selective device

  • Eliminator Trawl

    The eliminator trawl is a standard demersal trawl with very large diamond meshes in the wings and forward part of the trawl.
    Selective device

  • Escape Gaps

    Escape gaps are usually flat pieces of rigid plastic with a rectangular hole in that is fitted into pots and traps to release small shellfish
    Selective device

  • F-Cap. (Faithlie Cod Avoidance Panel)

    The F-CAP was developed to release cod from a nephrops trawl.
    Selective device

  • 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.
    Selective device

  • Gear Operation

    This is where there is a complete change of fishing gear or the way the fishing gear is operated to change the catch composition.
    Selective device

  • 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.
    Selective device

  • 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.
    Selective device

  • Inclined Netting Grids

    An inclined netting grid is a panel of netting fitted inside a trawl and set at an angle.
    Selective device

  • Number of Dredges

    In some scallop dredge fisheries the number of dredges used is regulated to ensure fishing effort remains within manageable limits.
    Selective device

  • Off Bottom Trawl

    This is a trawl that, by the way it is rigged and towed, swims clear of the seabed but close enough to target some of the demersal species.
    Selective device

  • Ring Size

    The ring size of scallop dredges can be used as a selectivity measure to release scallops below a certain size.
    Selective device

  • 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.
    Selective device

  • 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.
    Selective device

  • Separator panels

    A separator panel is a horizontal panel of netting designed to divide the trawl into two sections one above the other.
    Selective device

  • 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.
    Selective device

  • Sort X grid

    The Sort X grid was developed in Norway as a measure to reduce the numbers of small fish being caught when targeting cod in the Barents Sea.
    Selective device

  • Square Mesh Cod-ends

    This is one of the most effective escape devices available for the release of small undersized round fish.
    Selective device

  • Square Mesh Panels

    The square mesh panel is one of the most common used and well known selective devices.
    Selective device

  • T90 Cod-ends

    In this design the cod-end mesh is turned through 90 degrees into T90 configuration.
    Selective device

  • Towing speed

    In some situations a change in towing speed can dramatically change the composition of the catch.
    Selective device

  • Inclined Separator Panels

    An inclined separator panel separates the catch into the bottom living and the higher swimming species and directs them into two separate cod-ends.
    Selective device