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1: trawl warp, 2: otter boards, 3: longline chains, 4 hunter, 5: weights 6: headline with floats, 7: pre-net, 8: tunnel and belly, 9: codend. Midwater trawling is trawling, or net fishing, at a depth that is higher in the water column than the bottom of the ocean. It is contrasted with bottom trawling.
In 2020, the National Marine Fisheries Service put a midwater trawler exclusion zone of 20 miles around Cape Cod. The restricted area was implemented but the rule was subsequently vacated by a ...
Midwater (pelagic) trawling is a much "cleaner" method of fishing, in that the catch usually consists of just one species and does not physically damage the sea bottom. However, environmental groups have raised concerns that this fishing practice may be responsible for significant volumes of by-catch, particularly cetaceans (dolphins, porpoises ...
A fishing trawler is a commercial fishing vessel designed to operate fishing trawls. Trawling is a method of fishing that involves actively dragging or pulling a trawl through the water behind one or more trawlers. Trawls are fishing nets that are pulled along the bottom of the sea or in midwater at a specified depth. A trawler may also operate ...
Midwater trawling catches pelagic fish such as anchovies and mackerel, whereas bottom trawling targets both bottom-living fish and semi-pelagic species such as cod, squid, shrimp, and rockfish. Trawling is done by a trawler , which can be a small open boat with only 30 hp (22 kW) or a large factory trawler with 10,000 hp (7,500 kW).
A stern trawler tows a fishing trawl net and hauls the catch up a stern ramp. These can be either demersal (weighted bottom trawling); pelagic (mid-water trawling); or pair trawling , where two vessels about 500 metres apart together pull one huge net with a mouth circumference of 900 meters.
Paired trawling was prohibited in 1977 in an effort to limit the impacts of fishing on the seabed. Restrictions on the lengths and hook spacing of longlines were introduced in 1994. Limits on the size and weight of bobbins and foot ropes were introduced in 2003, again in an effort to reduce the impacts of fishing on seabed habitats.
The Company is governed by its Prime Warden, five other Wardens and its Court of Assistants, comprising 28 appointed Livery members. The Company comprises about 700 members, including a good representation of from the seafood trade, UK fisheries and marine and freshwater conservation.