Copy of `Fish Online - Glossary of marine conservation`
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Fish Online - Glossary of marine conservation
Category: Animals and Nature > Fishing
Date & country: 11/12/2007, UK
mature part of a stock responsible for reproduction.
Spawning Stock Biomass (SSB)
the total weight of all sexually mature fish in a population.
or fixed gears refers to fishing gears that are fixed to or on the seabed e.g pots, traps or nets. These types of gears are passive as opposed to mobile gears, e.g. trawl nets, which are referred to as active gears.
term given to a group of individuals or populations in a species occupying a well-defined spatial range independent of other stocks of the same species. A stock will form the basis of a distinct fishery defined management unit in terms of season and area.
Usually expressed at the weight of fish per volume of water, for example 15kg/m3.
fish stocks that migrate through more than one Exclusive Economic Zone (EEZ).
the rope (usually wire) between the otter board and trawl net.
a type of bottom set gill net used to capture flatfish, crustaceans and other species.
species or assemblage of species which are primarily sought in a fishery.
fish with a bony skeleton as opposed to cartilaginous fish (elasmobranchs).
Total Allowable Catch (TAC)
maximum tonnage, set each year, that may be taken of a fish species within an area.
pertaining to levels in a food chain
Turtle Excluding Device (TED)
turtles can be excluded from trawl nets by fitting solid grids of various kinds into the net. The TED consists of a metal frame, or hinged door system, which deflects turtles out of a webbing flap or 'trap door' in the bottom of the net. The target species, usually shrimp or prawn, pass through the grid into the cod-end.
World Conservation Union (IUCN)
founded in 1948. Every 4 years IUCN publishes a 'Red List' - an inventory of the current global status of plant and animal species - to raise awareness of species threatened with extinction and promote their conservation. Of the total number (284) of marine fish assessed by IUCN, 57% are assessed as threatened i.e. Critically Endangered, Endangered or Vulnerable. For more information see www.iucn.org
the animal component of plankton; animals suspended or drifting in the water column including larvae of many fish and benthic invertebrates.