Document Detail

Remarks on antipredator behavior and food chain dynamics.
MedLine Citation:
PMID:  15560907     Owner:  NLM     Status:  MEDLINE    
When consumers feeding on a resource spend time in avoiding high risks of predation, the predator functional response declines with predator density. While this is well established, less attention has been paid to the dependence of the consumer functional response on predator density. Here we show how the separation of behavioral and ecological timescales allows one to determine both responses starting from an explicit behavioral model. Within the general set-up considered in this paper, the two functional responses can tend toward Holling type II responses when consumers react only weakly to predation. Thus, the main characteristics of the standard Rosenzweig-MacArthur tritrophic food chain (logistic resource and Holling type II consumer and predator) remain valid also when consumers have weak antipredator behavior. Moreover, through numerical analysis, we show that in a particular but interesting case pronounced antipredator behaviors stabilize the system.
Sergio Rinaldi; Alessandra Gragnani; Silvia De Monte
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Theoretical population biology     Volume:  66     ISSN:  0040-5809     ISO Abbreviation:  Theor Popul Biol     Publication Date:  2004 Dec 
Date Detail:
Created Date:  2004-11-24     Completed Date:  2005-03-10     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0256422     Medline TA:  Theor Popul Biol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  277-86     Citation Subset:  IM    
CIRITA, c/o Department of Electronics and Information, Politecnico di Milano, Via Ponzio 34/5, 20133 Milano, Italy.
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MeSH Terms
Food Chain*
Models, Theoretical
Nonlinear Dynamics
Predatory Behavior*

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