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Title of Journal: J Ethol

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Abbravation: Journal of Ethology

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Springer Japan

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DOI

10.1016/0031-9422(80)85133-8

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1439-5444

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Discrimination of chemical stimuli in conspecific

Authors: Dustin J Wilgers Eva A Horne
Publish Date: 2008/06/06
Volume: 27, Issue: 1, Pages: 157-163
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Abstract

Iguanid lizards are known for visual acuity and a diminished vomeronasal organ which has led to mixed conclusions on whether iguanids use chemical cues The collared lizard Crotaphytus collaris is a territorial iguanid that lives in open rocky habitats Fecal pellets placed prominently on open rocky perches may provide an ideal mechanism for intraspecific chemical signaling In order to determine whether collared lizards can discriminate between chemical stimuli found in conspecific fecal pellets we collected 24 males and 25 females to analyze sexspecific behavioral responses via tongueflicks and a newly observed behavior for the species gular pumps to cotton swabs containing water cologne chemical stimuli from conspecific male and female fecal pellets and the lizard’s own fecal pellet Both sexes were able to discriminate chemical stimuli from water via at least one behavior Male collared lizards exhibited greater rates of response tongueflick and gular pumps toward male fecal pellets when compared to the negative water control Our results also suggest individuals may be able to discriminate between fecal pellets as indicated by generally greater but nonsignificant counts of male tongueflick responses to male fecal pellets when compared to their own Collared lizard chemical discrimination appears to utilize tongueflick and gular pump behaviors possibly associated with distinct chemosensory modes vomerolfaction and olfaction Based on this study we suggest that chemical signals may play a greater role in intraspecific communication than previously thought in this highly visual lizardThis research was financially supported by Kansas State University Collecting and housing of individuals was conducted under Kansas State University IACUC protocol 2297 and Kansas Wildlife and Parks collecting permits SC0732004 and SC0852005 Thanks to M Williamson S Tolve and A Wilgers for assistance in collection of individuals Thanks to E Hebets R Willemart R Santer A Rundus K FowlerFinn S Schwartz M Adams and two anonymous reviewers for comments on early versions of the manuscript

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  14. Sexual selection in genetic colour-polymorphic species: a review of experimental studies and perspectives
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