| Predator harvesting in stage dependent predation models: insights from a threshold management policy. | |
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MedLine Citation:
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PMID: 18786549 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Stage dependent predation may give rise to the hydra effect--the increase of predator density at equilibrium as its mortality rate is raised. Management strategies that adjust predator harvest rates or quotas based on responses of populations to past changes in capture rates may eventually lead to a catastrophic collapse of predator species. A proposed threshold management policy avoids the hydra effect and its subsequent danger of predator extinction. Suggestions to extend the application of threshold policies in areas such as intermediate disturbance hypothesis, density-trait mediated interactions and non-optimal anti-predatory behavior are put forward. |
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Authors:
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Michel Iskin da Silveira Costa |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Mathematical biosciences Volume: 216 ISSN: 0025-5564 ISO Abbreviation: Math Biosci Publication Date: 2008 Nov |
Date Detail:
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Created Date: 2009-03-23 Completed Date: 2009-04-28 Revised Date: 2009-11-11 |
Medline Journal Info:
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Nlm Unique ID: 0103146 Medline TA: Math Biosci Country: United States |
Other Details:
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Languages: eng Pagination: 40-6 Citation Subset: IM |
Affiliation:
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Laboratório Nacional de Computação Científica, Av. Getúlio Vargas 333, Quitandinha, Petrópolis-RJ 25651-070, Brazil. michel@lncc.br |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Conservation of Natural Resources Ecosystem* Fisheries Models, Biological* Predatory Behavior* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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