- demersal trawl
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донный трал
Англо-русский словарь технических терминов. 2005.
demersal trawl
Смотреть что такое "demersal trawl" в других словарях:
demersal trawling — Operation of a trawl net designed for use on or near the bottom of the sea or lake, e.g. otter trawl … Fisheries — dictionary
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… … Fisheries — dictionary
demersal trawling — bottom trawling, e.g. otter trawl, beam trawl … Dictionary of ichthyology
trawl-fishing — A type of active fishing method in which a large bag like net is drawn along behind a boat in order to target either demersal or pelagic fish species. Many variations on this model exist … Fisheries — dictionary
rock-hopper trawl — a demersal otter trawl with rubber disks attached to the groundrope and to a second rope off centre. When the trawl encounters an obstruction on the sea bed, the groundrope and the second rope wind around each other and accumulate tension,… … Dictionary of ichthyology
dragger trawl — 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… … Dictionary of ichthyology
bottom trawl — a net shaped like a bag dragged along the sea floor. The lower edge of the net has a thick ground rope or bobbins to prevent net damage and is heavily ballasted. Some trawls are low opening to capture demersal species, others are high opening to… … Dictionary of ichthyology
high-opening trawl — a bottom trawl designed to catch semi demersal or pelagic species … Dictionary of ichthyology
low-opening trawl — a bottom trawl designed to capture demersal species … Dictionary of ichthyology
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
Fisheries glossary — This is a glossary of terms used in fisheries, fisheries management and fisheries science. A * Abundance is a measure of how many fish are in a population or a fishing ground. See relative abundance and absolute abundance.* Acoustic survey a… … Wikipedia
