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Population dynamics of exploited fish stocks at low population levels

by Barrowman, N.J , Hutchings, J.A , Myers, R.A. (Northwest Atlantic Fisheries Centre, St. John's Newfoundland, Canada.) , Rosenberg, A.A

in Animal Husbandry / Animal populations / Animal, plant and microbial ecology / Animals / Applied ecology / Biological and medical sciences / Comparative Analysis / Depopulation / DINAMICA DE LA POBLACION / DYNAMIQUE DES POPULATIONS / Exploitation and management of natural biological resources (hunting, fishing and exploited populations survey, etc.) / Fish hatcheries / Fish populations / Fish stocking / fishery resources / Fundamental and applied biological sciences. Psychology / Goodness of Fit / Marine / Marine fishes / Maximum Likelihood Statistics / Mice / Modeling / overfishing / PECHES / PESCA / Pisces / Population density / Population dynamics / Population inversion / Population levels / Recruitment / RECURSOS PESQUEROS / Reproductive success / RESSOURCE HALIEUTIQUE / River ports / Riverbanks

1995

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Population dynamics of exploited fish stocks at low population levels

by Barrowman, N.J , Hutchings, J.A , Myers, R.A. (Northwest Atlantic Fisheries Centre, St. John's Newfoundland, Canada.) , Rosenberg, A.A

1995

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Population dynamics of exploited fish stocks at low population levels

by Barrowman, N.J , Hutchings, J.A , Myers, R.A. (Northwest Atlantic Fisheries Centre, St. John's Newfoundland, Canada.) , Rosenberg, A.A

1995

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Journal Article

Population dynamics of exploited fish stocks at low population levels

Barrowman, N.J,

Hutchings, J.A,

Myers, R.A. (Northwest Atlantic Fisheries Centre, St. John's Newfoundland, Canada.),

Rosenberg, A.A

1995

Overview

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

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Publisher

American Society for the Advancement of Science,American Association for the Advancement of Science,The American Association for the Advancement of Science

Subject

Animal Husbandry

/ Animal populations

/ Animal, plant and microbial ecology

/ Animals

/ Applied ecology

/ Biological and medical sciences

/ Comparative Analysis

/ Depopulation

/ DINAMICA DE LA POBLACION

/ DYNAMIQUE DES POPULATIONS

/ Exploitation and management of natural biological resources (hunting, fishing and exploited populations survey, etc.)