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ISSCFG code: 09.4 – standard abbreviation: LVT
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OverviewA vertical line consists of a line to which is attached sinker and one or several hooks. In commercial fisheries the lines have usually several hooks. The additional hooks can be fixed on the mainline at short intervals with branch lines of a certain length. A special form of vertical lines are the jigger lines, mostly used in the fishery for squid. Special squid jiggers (Ripped hooks) are mounted one after the other in a certain distance with a monofilament line. The line weighed down by sinkers can be set up to 200 m depth and is hauled with jerky movements.Handling EquipmentThe lines might be operated manually with or without using a pole or rod, or mechanically, using powered reels or drums.Vessel OverviewDepending on the method of line fishing, vessels of all sizes can be used. They range from open boats to larger vessels with several line haulers or large, industrial, squid jigger vessels equipped with series of jigging machines and strong lamps to attract the target species.Fish OperationThe fish are attracted by natural or artificial bait (lures), sometimes in association with light attraction, hooked and held by the mouth until they are brought aboard the operating vessel which periodically or continuously hauls the gear.Target SpeciesPelagic, demersal and benthic species.Water Area OverviewAll over the world.Gear EnvironmentVertical lines are operated in a very wide range of depths, either in inland and sea waters. With line fishing it is possible to catch fish on rough ground, even in their hiding places between the rocks.ImpactsSpecies The type and size of the hooks and sort of bait can be adjusted to the target species; this method is rather selective. However, in certain areas, some incidental catch, e.g. of sharks, may create problems.
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