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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

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