Document Detail

Predator-elicited foot shakes in wall lizards (Podarcis muralis): evidence for a pursuit-deterrent function.
MedLine Citation:
PMID:  22352886     Owner:  NLM     Status:  MEDLINE    
Under certain circumstances, prey may inform potential predators of their unprofitability by means of pursuit-deterrent signals. The evidence for pursuit-deterrent signaling in reptiles is scant and taxonomically biased. Wall lizards, Podarcis muralis (Squamata: Lacertidae) produce several distinct types of stereotyped foot shake displays, of which one, performed in antipredator contexts, is a likely candidate for a pursuit-deterrent function. We investigated this possibility by recording the responses of lizards in the field to a slowly approaching human acting as a surrogate predator. In addition to starting and flight initiation distances, we measured the presence of foot shakes, the leg that was shaken, and the distance from the observer at which the display was performed (display distance). Of a total of 484 approaches, 109 (22.5%) elicited foot shake displays. Roughly half the lizards displayed from the location where they were first sighted, while the other half moved a short distance, then displayed. There was no left-right preference in the leg used to display, but most lizards displayed with the leg closer to the approaching predator. Juveniles and subadults had smaller flight initiation distances than adult lizards. There were no sex-related differences in starting or flight initiation distances, but females, for a given distance, were more likely to display than males. Foot shake display frequency declined abruptly at 1 m. If lizards waited until the surrogate predator was this close, they mostly fled without displaying. Our results show that antipredator foot shaking in P. muralis is consistent with expectations from pursuit-deterrent theory.
Enrique Font; Pau Carazo; Guillem Pérez i de Lanuza; Matthew Kramer
Related Documents :
19472056 - The balance recovery mechanisms against unexpected forward perturbation.
8280726 - Visual control of human stance on a narrow and soft support surface.
1629766 - Coordination between equilibrium and head-trunk orientation during leg movement: a new ...
15799576 - Influence of visually induced self-motion on postural stability.
18532476 - From the electrical shunting of a loudspeaker to active impedance control.
22501716 - The benefits of bilateral and directionally selective auditory prostheses.
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of comparative psychology (Washington, D.C. : 1983)     Volume:  126     ISSN:  1939-2087     ISO Abbreviation:  J Comp Psychol     Publication Date:  2012 Feb 
Date Detail:
Created Date:  2012-02-22     Completed Date:  2012-07-13     Revised Date:  2012-07-18    
Medline Journal Info:
Nlm Unique ID:  8309850     Medline TA:  J Comp Psychol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  87-96     Citation Subset:  IM    
Instituto Cavanilles de Biodiversidad y Biología Evolutiva, Universidad de Valencia, Valencia, Spain.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Escape Reaction*
Erratum In:
J Comp Psychol. 2012 May;126(2):169

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

Previous Document:  Long-term disease history, clinical symptoms, health status, and healthcare utilization in patients ...
Next Document:  Longitudinal stability of friendships in rhesus monkeys (Macaca mulatta): individual- and relationsh...