- surface trawl
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a floating trawl pulled by two boats and used in shallow water
Dictionary of ichthyology. 2009.
surface trawl
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Manta trawl — A Manta Trawl is a net system for sampling the surface of the ocean. It resembles a manta ray, with metal wings and a broad mouth. The net it pulls is made of thin mesh, and the whole trawl is towed behind a scientific research vessel.[1] The… … Wikipedia
Métro de surface — Tramway Le tramway /tʁa.mwɛ/ (ou tram) est une forme de transport en commun urbain ou interurbain circulant sur des voies ferrées équipées de rails plats (alors que ceux des trains sont légèrement inclinés vers l intérieur de la voie) et qui est… … Wikipédia en Français
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
midwater pair trawl — a net towed through the water column by two boats, thus ensuring the horizontal opening of the net. Such nets are designed and rigged to work in midwater. Surface trawls are also included in this category … Dictionary of ichthyology
commercial fishing — Introduction the taking of fish and other seafood and resources from oceans, rivers, and lakes for the purpose of marketing them. Fishing is one of the oldest employments of humankind. Ancient heaps of discarded mollusk shells (shell… … Universalium
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
undersea exploration — Introduction the investigation and description of the ocean waters and the seafloor and of the Earth beneath. Primary objectives and accomplishments Included in the scope of undersea exploration are the physical and chemical… … Universalium
Sponge reef — taxobox image caption = Hexactinellae from Ernst Haeckel s Kunstformen der Natur , 1904 name = Hexactinellid Reef Sponges regnum = Animalia phylum = Porifera classis = Hexactinellida subclassis = Hexasterophora subdivision ranks = Orders… … 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
Vessel monitoring system — Vessel monitoring systems (VMS) are used in commercial fishing to allow environmental and fisheries regulatory organizations to monitor, minimally, the position, time at a position, and course and speed of fishing vessels. They are a key part of… … Wikipedia
