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29 March 2024
 
  » pubmed » pmid17755535

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Population Dynamics of Exploited Fish Stocks at Low Population Levels
R A Myers ; N J Barrowman ; J A Hutchings ; A A Rosenberg ;
Date 25 Aug 1995
Journal Science, 269 (5227), 1106-1108
AbstractModels of population dynamics in which per capita reproductive success declines at low population levels (variously known as depensation, the Allee effect, and inverse density-dependence) predict that populations can have multiple equilibria and may suddenly shift from one equilibrium to another. If such depensatory dynamics exist, reduced mortality may be insufficient to allow recovery of a population after abundance has been severely reduced by harvesting. Estimates of spawner abundance and number of surviving progeny for 128 fish stocks indicated only 3 stocks with significant depensation. Estimates of the statistical power of the tests strengthen the conclusion that depensatory dynamics are not apparent for fish populations at the levels studied.
Source PubMed, pmid17755535 doi: 10.1126/science.269.5227.1106
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