midwater otter trawl

midwater otter trawl
midwater trawl

Dictionary of ichthyology. 2009.

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  • midwater trawl — a net towed through the water column by one boat, the net being positioned above the bottom and below the surface. It may have otter doors that function to keep the net mouth open and depressor plates that function to make it fish deeper, or two… …   Dictionary of ichthyology

  • echelon trawl — an experimental form of otter trawl with a large upper wing and paravanes instead of doors. Meant for use in bottom fishing and midwater herring fishing …   Dictionary of ichthyology

  • dual fin otter board — an otter board developed in British Columbia for midwater trawling using plywood sections to spread the trawl mouth …   Dictionary of ichthyology

  • Suberkrub otter board — an all steel and cambered otter board on a midwater trawl, vertically aspect greater than the horizontal. Named for its inventor …   Dictionary of ichthyology

  • Fishing trawler — For other types of trawlers, see Trawler (disambiguation). The Irish RSW tank trawler Brendelen[1] in Skagen harbour A fishing trawler (also called a dragger) is a commercial fishing vessel designed to operate fishing trawls. Traw …   Wikipedia

  • Bottom trawling — The Celtic Explorer, a research vessel engaged in bottom trawling …   Wikipedia

  • 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

  • Trawling — is a method of fishing that involves pulling a large fishing net through the water behind one or more boats. The net that is used for trawling is called a trawl.The boats that are used for trawling are called trawlers. Trawlers vary in size; from …   Wikipedia

  • Maritime history of California — History of California This article is part of a series Timeline …   Wikipedia

  • Life Sciences — ▪ 2009 Introduction Zoology       In 2008 several zoological studies provided new insights into how species life history traits (such as the timing of reproduction or the length of life of adult individuals) are derived in part as responses to… …   Universalium

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