Oceans' Vocabulary Unit 4. GROUND FISH  fish that live on, in, or near the bottom of the body of water they inhabit.  Examples –cod, haddock, red fish,

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Presentation transcript:

Oceans' Vocabulary Unit 4

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

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

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

YEAR-CLASS  consist of all fish born in the same year.

FECUNDITY  The number of eggs which is laid during one spawning period

Methods of Fishing  _seafoodwatch/sfw_gear.aspx _seafoodwatch/sfw_gear.aspx _seafoodwatch/sfw_gear.aspx

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. otter boards otter boards

Otter trawler

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

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

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

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

TARGET CATCH  The species which the fishermen intentionally or are licensed to catch and keep

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. speciesfishspeciesfish

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