Strike-induced chemosensory searching by the anguid lizard Elgaria coerulea

Autor:	William E. Cooper
Rok vydání:	1995
Předmět:	Phylogenetic inertia Phylogenetic tree biology Ecology Lizard Elgaria coerulea Xenosauridae Foraging Zoology biology.organism_classification Varanoidea biology.animal Animal Science and Zoology Adaptation Ecology Evolution Behavior and Systematics
Zdroj:	Amphibia-Reptilia. 16:147-156
ISSN:	1568-5381 0173-5373
DOI:	10.1163/156853895x00325
Popis:	Strike-induced chemosensory searching (SICS), including a post-strike elevation in tongue-flick rate (PETF) and searching movements following experimental removal of prey from the predator's mouth, is demonstrated to occur in an anguid lizard, Elgaria coerulea. This finding confirms predictions based on the previously established widespread occurrence of SICS in scleroglossan (especially autarchoglossan) lizard families and on a strong association between SICS and active foraging. Reasons why SICS should be favored by natural selection in active foragers are discussed, but the presence of SICS in anguids is attributed to phylogenetic inertia rather than adaptation. SICS was statistically significant only during the first two minutes in E. coerulea. Its limited duration in an anguid and much greater duration in helodermatids, varanids, and snakes suggest that prolonged SICS may have had a single origin in the common ancestor of Varanoidea or, much less likely, of (Varanoidea + Xenosauridae). Uncertainties about origins due to missing data on certain taxa and to unresolved phylogenetic relationships within Seleroglossa are discussed.
Databáze:	OpenAIRE
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