otter trawl
demersal trawl operated by a single vessel in which the horizontal opening of the net is achieved and maintained by angle-towed otter boards (large rectangular \'boards\' of timber or steel) and the vertical opening by a combination of floats on the headrope and weights on the ground line. Attached between the head and ground ropes and the towing warps, the otter boards are spread apart by the hydrodynamic forces acting on them when the net is towed.

Fisheries — dictionary. . 2004.

Look at other dictionaries:

  • otter trawl — dugninis tralas statusas T sritis ekologija ir aplinkotyra apibrėžtis Siaurėjančio maišo formos žvejybos tinklas, pritaikytas bentosinėms (priedugninėms) žuvims žvejoti. atitikmenys: angl. otter trawl vok. Grundschleppnetz, n rus. донный трал, m …   Ekologijos terminų aiškinamasis žodynas

  • otter-trawl — ottˈer trawl noun A trawl with otter boards • • • Main Entry: ↑otter …   Useful english dictionary

  • otter trawl — a trawl net equipped with otter boards. Cf. beam trawl. [1895 1900] * * * …   Universalium

  • otter trawl — a towed net that strains demersal fish out of the water. Rectangular otter boards of wood or steel on the tow ropes plane through the water and help keep the mouth open and give the trawl its name; floats on the headrope and weights on the ground …   Dictionary of ichthyology

  • otter trawl — noun : a trawl using otter boards to spread the net and drawn usually by trawlers that handle the fish caught …   Useful english dictionary

  • bottom otter trawl — an otter trawl towed on the sea floor by one boat; the net is kept open by otter boards that plane through the water and are heavy enough to maintain contact with the sea floor. The otter boards have a steel bottom to protect them against the… …   Dictionary of ichthyology

  • midwater otter trawl — midwater trawl …   Dictionary of ichthyology

  • twin otter trawl — twin rig …   Dictionary of ichthyology

  • trawl board — otter board (a large, heavy, flat piece of wood and metal on each side of the mouth of an otter trawl; the boards plane or shear through the water and keep the net mouth open) …   Dictionary of ichthyology

  • trawl door — otter board (a large, heavy, flat piece of wood and metal on each side of the mouth of an otter trawl; the boards plane or shear through the water and keep the net mouth open) …   Dictionary of ichthyology

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