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Article overview
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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 | Abstract: | Models 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 | Services: | Forum | Review | Favorites |
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