FAO/FIIT Fishing Gear Type Fact-Sheet Trammel nets [GTR] updated : 10-mai-2001 ISSCFG Classification : > Category : Trammel nets Profile General Description: A trammel net consists of two/three layers of netting with a slack small mesh inner netting between two layers of large mesh netting within which fish will entangle. These nets are strings of single, double or triple netting walls kept more or less vertical by floats on theheadrope and mostly by weights on thegroundrope. These are occasionally set in strings. Specific Equipment: Small solid floats, usually made of plastic and either cylindrical or egg-shaped, are attached to the headrope and lead weights are evenly distributed along the groundrope. Specific Handling Equipment: Most trammel nets use to be hauled by hand. Moderngillnet haulers may also be used fro hauling the nets.Net drums are also, occasionally, employed. Fishing Vessels using this gear: Gillnetters Fishing Operations: Trammel nets are most common as stationary gear, but they can also be used drifting. The fish entangle themselves in a pocket of small mesh webbing between the two layers and large meshed walls. Afterwards, the trammel nets are hauled back to the surface for extracting the entangling fish from the netting. Features Target Species: Demersal species, fish and crustaceans. Areas: all The Gear and its Environment: Deployment Area: These nets are especially used to fish at, or near to, the bottom in inland and marine waters. Impact on Aquatic Species: "Ghost" fishing of lost gears and capture of small sized organisms and non-target species, which are frequently discarded at sea. Such impact can be mitigated by using larger meshes. However, compared to gillnets the selectivity of trammel nets are lower and catches of small organisms and non-target species are common.