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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 ...
Trawling occurs mainly over sandy sediments, but areas of muddy substrate and coarser, gravely substrates are also trawled. [4] A five-year benthic trawl experiment was implemented between 2014 and 2019 with the purpose of determining the environmental impact of demersal trawling in South African waters.
Oil painting of gillnetting, The salmon fisher, by Eilif Peterssen National Oceanic and Atmospheric Administration illustration of a gillnet Gillnetting is a fishing method that uses gillnets: vertical panels of netting that hang from a line with regularly spaced floaters that hold the line on the surface of the water.
Pair trawling is a fishing activity carried out by two boats, with one towing each warp (the towing cables). As the mouth of the net is kept open by the lateral pull of the individual vessels, otter boards are not required.
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.
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