trålning
Trålning is a fishing method in which a large trawl net is dragged through the water by one or more vessels. The net can be towed along the seabed (bottom trålning) or in midwater (pelagisk trålning). Bottom trålning targets demersal species such as cod, haddock, and flatfish, while pelagic trålning targets schooling species such as herring or mackerel. A trålning net typically consists of a wide opening (headrope) and a tapered codend; it is spread by trawl doors or otter boards that keep the net open as it is pulled through the water.
To operate, a vessel maintains a controlled speed while deploying and retrieving the net with winches or
History and development: trålning emerged in the 19th century and expanded with steam-powered vessels in the
Environmental and regulatory aspects: bottom trålning can disturb seabed habitats and coral or rocky substrates, while
Economy and context: trålning remains a dominant fishing method in many regions, supporting a wide range of