Document Detail

A guide to central place effects in foraging.
MedLine Citation:
PMID:  18550139     Owner:  NLM     Status:  MEDLINE    
We develop a general patch-use model of central place foraging, which subsumes and extends several previous models. The model produces a catalog of central place effects predicting how distance from a central place influences the costs and benefits of foraging, load-size, quitting harvest rates, and giving-up densities. In the model, we separate between costs that are load-size dependent, i.e. a direct effect of the size of the load, and load-size independent effects, such as correlations between distance and patch qualities. We also distinguish between predictions of between- and within-environment comparisons. Foraging costs, giving-up densities and quitting harvest rates should almost always increase with distance with these effects amplified by increases in metabolic costs, predation risk and load-costs. With respect to load-size: when comparing foraging in patches within an environment, we should often expect smaller loads to be taken from distant patches (negative distance-load correlation). However, when comparing between environments, there should be a positive correlation between average distance and load-size.
Ola Olsson; Joel S Brown; Kurt L Helf
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2008-04-30
Journal Detail:
Title:  Theoretical population biology     Volume:  74     ISSN:  1096-0325     ISO Abbreviation:  Theor Popul Biol     Publication Date:  2008 Aug 
Date Detail:
Created Date:  2008-07-14     Completed Date:  2008-09-16     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0256422     Medline TA:  Theor Popul Biol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  22-33     Citation Subset:  IM    
Department of Animal Ecology, Lund University, Sweden.
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MeSH Terms
Exploratory Behavior*
Feeding Behavior*
Models, Statistical
Models, Theoretical

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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