Olfaction and predator detection inColeonyx brevis (Squamata: Eublepharidae), with comments on the functional significance of buccal pulsing in geckos

Dial, Benjamin E.; Schwenk, Kurt

doi:10.1002/(sici)1097-010x(19961215)276:6<415::aid-jez5>3.0.co;2-q

Cited by 96 publications

(53 citation statements)

References 41 publications

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“…EXPERIMENT 2 This experiment was conducted to examine the responses of lizards to chemicals from unfamiliar, novel stimuli. Because artificial chemicals such as cologne, which has been widely used as a control for odorant stimuli (see Cooper, 1998a for review), may not be an appropriate control (Dial and Schwenk, 1996;Cooper, 1998a), we did not use them. Alternatively, we used chemicals from a non-saurophagous snake allopatric with E. okadae, as an odorant, novel control stimulus.…”

Section: Discussionmentioning

confidence: 98%

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Geographic Differences in Behavioral Responses of Hatchling Lizards (<i>Eumeces okadae</i>) to Snake-predator Chemicals

Mori

Hasegawa

1999

Jpn.J.Herpetol.

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Antipredator and tongue flicking responses of hatchlings of Eumeces okadae were compared between Kozu-shima Island, where they co-occur with snake predators, and Hachijo-kojima, a snake-free island. In Experiment 1 lizards from both islands showed higher tongue flick rates to cotton swabs bearing snake and prey chemicals than to controls. Lizards from Hachijo-kojima emitted more tongue flicks to snake chemicals than those from Kozu-shima. In Experiment 2 lizards from Hachijokojima showed higher tongue flick rates to cotton swabs bearing non-saurophagous, allopatric snake chemicals than to control stimuli. Lizards from Kozu-shima exhibited tail wave display, which may deflect attacks to the autotomous tail, more frequently to saurophagous snake chemicals than to non-saurophagous snake and control stimuli, but there were no significant differences in tongue flick rates among the three chemicals for these lizards. In Experiment 3 lizards were introduced into an unfamiliar terrarium treated with snake chemicals. Lizards from Hachijo-kojima emitted more tongue flicks in cages chemically labelled by snakes than in control cages. No significant differences were observed in tongue flick rates between snake labelled and control cages in Kozu-shima lizards, and their tongue flick rates in snake labelled cages were significantly lower than those of Hachijo-kojima lizards. There were no differences in the frequency of tail waves, wall-climbing, movements, or immobility between snake labelled and control cages in lizards from both islands. Based on the higher tail wave frequency and lower tongue flick rates in Kozu-shima lizards than in Hachijo-kojima lizards, we hypothesize that lizards from Kozu-shima have evolved the ability to recognize chemical cues from snake predators after a few tongue flicks and that the higher tongue flick rates by lizards from Hachijo-kojima indicate less efficient recognition or lack of recognition of predator chemicals.

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Section: Discussionmentioning

confidence: 98%

“…Foraging tactics of predators (sit-and-wait or active foraging) may affect the reaction of prey animals to predator chemicals (Downes and Shine, 1998). Another complication is that some species may rely on nasal olfaction rather than vomerolfaction for chemical detection (Dial et al, 1989;Dial and Schwenk, 1996).…”

Section: Discussionmentioning

confidence: 99%

Geographic Differences in Behavioral Responses of Hatchling Lizards (<i>Eumeces okadae</i>) to Snake-predator Chemicals

Mori

Hasegawa

1999

Jpn.J.Herpetol.

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“…Therefore, chemicals that the tongue introduces into the oral cavity during tongue-flicking could, in principle, stimulate both vomeronasal and gustatory systems. The intense buccal pulsing that preceded tongue-flicking in our experiments (which presumably functions in the chemoreception of volatile compounds; Dial & Schwenk, 1996) and the lower latency to the first tongue-flick in the chemical condition compared with the control condition together suggest that lizards may be able to detect chemical prey stimuli at a distance by nasal olfaction. Following a period of buccal pulsing, most lizards approached and investigated the stimulus using the tongue-vomeronasal organ system.…”

Section: The Role Of Visual and Chemical Prey Cues In Predatory Behaviormentioning

confidence: 99%

Stimulus control of predatory behavior by the Iberian wall lizard (Podarcis hispanica, Sauria, Lacertidae): Effects of familiarity with prey.

Desfilis

Font

Guillén-Salazar

2003

Journal of Comparative Psychology

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The authors examine the relative roles of vision and chemoreception and the influence of previous experience with prey on the predatory behavior of Iberian wall lizards (Podarcis hispanica). Experiment 1 compared the responses to visual, chemical, and a combination of visual and chemical cues of a familiar prey by 2 groups of lizards that had been kept in captivity for either 3 months or 21 days. Experiment 2 assessed the responses of lizards kept in the laboratory for more than 3 months to a novel prey species. The results reveal that feeding on a prey species affects the lizards' responses to chemical stimuli from that prey. The response to chemical cues of a novel prey requires a 1st-feeding experience with that prey. Lizards that have been fed the same prey species for several months cease responding to the chemical stimuli of that particular prey.

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“…However, one of the most striking functional specializations in squamates involves the sensory modalities used to locate prey Schwenk, 2000;Bels, 2003). Whereas geckoes, the basalmost squamates (Townsend et al, 2004;Vidal and Hedges, 2004), rely predominantly on olfaction and vision to detect prey (Dial and Schwenk, 1996), several groups of squamates have independently evolved a more active foraging style that is highly dependent on the use of vomerolfaction (Vitt et al, 2003). This shift in behavior and performance was associated with distinct morphological changes of the tongue.…”

Section: Introductionmentioning

confidence: 99%

Inertial feeding in the teiid lizard Tupinambis merianae: the effect of prey size on the movements of hyolingual apparatus and the cranio-cervical system

Montuelle

Herrel

Schaerlaeken

et al. 2009

Journal of Experimental Biology

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SUMMARYIn most terrestrial tetrapods, the transport of prey through the oral cavity is accomplished by movements of the hyolingual apparatus. Morphological specializations of the tongue in some lizard taxa are thought to be associated with the evolution of vomerolfaction as the main prey detection mode. Moreover, specializations of the tongue are hypothesized to compromise the efficiency of the tongue during transport; thus, driving the evolution of inertial transport. Here we use a large teiid lizard, Tupinambis merianae, as a model system to test the mechanical link between prey size and the use of inertial feeding. We hypothesize that an increase in prey size will lead to the increased recruitment of the cranio-cervical system for prey transport and a reduced involvement of the tongue and the hyolingual apparatus. Discriminant analyses of the kinematics of the craniocervical, jaw and hyolingual systems show that the transport of large prey is indeed associated with a greater utilization of the cranio-cervical system (i.e. neck and head positioning). The tongue retains a kinematic pattern characteristic of lingual transport in other lizards but only when processing small prey. Our data provide evidence for an integration of the hyolingual and craniocervical systems; thus, providing partial support for an evolutionary scenario whereby the specialization of the tongue for chemoreception has resulted in the evolution of inertial transport strategies. Supplementary material available online at

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Olfaction and predator detection inColeonyx brevis (Squamata: Eublepharidae), with comments on the functional significance of buccal pulsing in geckos

Cited by 96 publications

References 41 publications

Geographic Differences in Behavioral Responses of Hatchling Lizards (<i>Eumeces okadae</i>) to Snake-predator Chemicals

Geographic Differences in Behavioral Responses of Hatchling Lizards (<i>Eumeces okadae</i>) to Snake-predator Chemicals

Stimulus control of predatory behavior by the Iberian wall lizard (Podarcis hispanica, Sauria, Lacertidae): Effects of familiarity with prey.

Inertial feeding in the teiid lizard Tupinambis merianae: the effect of prey size on the movements of hyolingual apparatus and the cranio-cervical system

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