Oceans' Vocabulary

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Oceans' Vocabulary

• Unit 4

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GROUND FISH

• fish that live on, in, or near the bottom of the
  body of water they inhabit.
• Examples cod, haddock, red fish, flounder

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PELAGIC

• fish that live near the surface or in the water
  column of coastal or ocean waters (but not on
  the bottom)
• Examples- herring, bluefin tuna, anchovies

4
RECRUITMENT

• Means the fish grow to a certain size or
  reproductive rate
• Refers to age a fish can be caught and counted in
  net

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YEAR-CLASS

• consist of all fish born in the same year.

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FECUNDITY

• The number of eggs which is laid during one
  spawning period

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Methods of Fishing

• http//www.montereybayaquarium.org/cr/cr_seafoodwa
  tch/sfw_gear.aspx

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OTTER TRAWLER

• Trawling is a method of fishing that involves
  actively dragging or pulling a trawl through the
  water behind one or more trawlers

• Otter trawlers deploy one or more parallel trawls
  kept apart horizontally using otter boards. These
  trawls can be towed in midwater or along the
  bottom.

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Otter trawler
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LONGLINING

• longliners set a single line of hooks, up to 130
  km long, behind the boat. Attached to it are
  literally thousands of baited hooks

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GILLNET

• A fishing net set vertically in the water so that
  fish swimming into it are entangled by the gills
  in its mesh

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PURSE SEINE

• A fishing seine is a net made of a long wall of
  netting that is drawn into the shape of a bag to
  enclose the catch
• Usually involves two boats

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BYCATCH

• fish caught unintentionally in a fishery while
  intending to catch other fish.

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TARGET CATCH

• The species which the fishermen intentionally or
  are licensed to catch and keep

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STOCK

• Fish stocks are the population of a particular
  species of fish, for which growth, recruitment,
  mortality and fishing mortality are the only
  significant factors in determining the
  population.

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MAXIMUM SUSTAINABLE YEILD

• MSY
• the largest yield (or catch) that can be taken
  from a species' stock over an indefinite period
• to maintain the population size at the point of
  maximum growth rate by harvesting the individuals
  that would normally be added to the population