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Scat on the doorstep: refuge choice in a group-living lizard is influenced by the presence of scat piles


Thompson, SA and Pearson, SK and While, GM and Chapple, DG and Gardner, MG, Scat on the doorstep: refuge choice in a group-living lizard is influenced by the presence of scat piles, Austral Ecology, 45, (4) pp. 426-434. ISSN 1442-9985 (2020) [Refereed Article]

Copyright Statement

Copyright 2020 Ecological Society of Australia

DOI: doi:10.1111/aec.12864


Group living often requires strong levels of communication between individuals. This communication is usually studied in the context of visual or auditory communication. However, chemical communication is the most widely used form of communication. We examined the role of chemical communication in mediating social decisions in a group‐living lizard, Egernia stokesii. Specifically, we examined the extent to which scat‐piling, a behaviour by which individuals deposit scat in a communal area, affected the refuge choice of individual E.†stokesii . To achieve this, we examined individual refuge choice in response to scat piles or single scats and against two types of scat stimuli, one being their own scat and the other being scat belonging to an unrelated and unfamiliar conspecific. We show that lizards behave differently when presented with a scat pile compared with a single scat, and whether the scat stimulus was their own or sourced from an unfamiliar conspecific. When scats were in piles, individuals spent more time inspecting, more time in, and more often chose the treatment refuge as their final refuge choice, at a trialís end, when the treatment was their own scat compared with when the treatment was the refuge with the unfamiliar scat. In contrast, for individual scat treatments, individuals spent more time inspecting and more often ended up in the treatment refuge with an unfamiliar scat compared with when the treatment was their own scat. These results suggest that individuals are responding to information contained within multiple components of the scats - both their volume and their source. These results have implications for understanding how social aggregations are maintained within squamates, where sociality has evolved independently from other vertebrate lineages.

Item Details

Item Type:Refereed Article
Keywords:chemical cues, Egernia stokesii, reptile, scat, social signals, sociality
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Behavioural ecology
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the biological sciences
UTAS Author:While, GM (Dr Geoff While)
ID Code:139277
Year Published:2020
Funding Support:Australian Research Council (DP150102900)
Web of Science® Times Cited:5
Deposited By:Zoology
Deposited On:2020-06-04
Last Modified:2020-07-02

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