Stock Structure of the Cod Fisheries

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Issue:

Science

 

Written by:

Christopher A

 

Date added:

June 21, 2016

 

Level:

University

 

Grade:

A

 

No of pages / words:

14 / 3906

 

Was viewed:

6675 times

 

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Essay content:

Subpopulations are a fraction of a population that is itself genetically self-sustaining. It is the smallest natural self-perpetuating unit. Although differences between sub-populations may be small they are heritable (Iverson, 1996). Members of a subpopulation segregate at spawning time, whereas members of a stock need not...
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The fish in different stocks may differ in their size and growth rate, in the range they occupy, in their habits of migration and spawning, or in a variety of other features of physiology or behaviour. There is evidence that many traditionally identified cod stocks contain a number of sub-stocks oriented to particular feeding and spawning grounds along the coast or offshore, despite this, at present the northern cod stocks are managed as one unit (Ryan, 1996)...
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