frame trawl
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trawl head — a strong, heart shaped iron frame fitted at each end of a trawl beam to raise it about one metre off the sea bed. The after side is straight and slopes upward of each head to stake the ropes or wires by which the trawl is towed. The sides of the… … Dictionary of ichthyology
agassiz trawl — ˈagə(ˌ)sē noun Usage: usually capitalized A Etymology: after Alexander Agassiz died 1910 American zoologist : a dredge that consists of a heavy rectangular iron frame to which is fitted the mouth of a bag of stout netting and that is used in… … Useful english dictionary
head iron — trawl head (a strong, heart shaped iron frame fitted at each end of a trawl beam to raise it about one metre off the sea bed. The after side is straight and slopes upward of each head to stake the ropes or wires by which the trawl is towed. The… … Dictionary of ichthyology
sledge — trawl head (a strong, heart shaped iron frame fitted at each end of a trawl beam to raise it about one metre off the sea bed. The after side is straight and slopes upward of each head to stake the ropes or wires by which the trawl is towed. The… … 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
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
HTML — For the use of HTML on Wikipedia, see Help:HTML in wikitext. HTML (HyperText Markup Language) Filename extension .html, .htm Internet media type text/html Type code TEXT … Wikipedia
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
Sediment Profile Imagery — (SPI) is an underwater technique for photographing the interface between the seabed and the overlying water. The technique is used to measure or estimate biological, chemical, and physical processes occurring in the first few centimetres of… … Wikipedia
Kite types — Colorful delta wing kite Kites are tethered flying objects which fly by using aerodynamic lift, requiring wind, (or towing), for generation of airflow over the lifting surfaces. Contents 1 Kite … Wikipedia
