Chemical Recognition of Familiar vs. Unfamiliar Conspecifics by Juvenile Iguanid Lizards, Ctenosaura similis

Authors


Corresponding author: Kathryn A. Hanley, Department of Biology, University of Maryland, College Park, MD 20742, USA. E-mail: kathryn–hanley@umail.umd.edu

Abstract

The ability of juvenile black iguanas, Ctenosaura similis, to discriminate between the chemical cue of an unfamiliar and a familiar conspecific was tested. Lizards directed significantly more tongue extrusions toward the chemical cue of a size-matched conspecific with whom they had never interacted than the chemical cue of a size-matched conspecific with whom they had interacted for 3 d. We consider the possibility that the social relationship between familiar associates may explain variation in the direction and degree of response to unfamiliar vs. familiar chemical cues.

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