Movement signal choreography unaffected by receiver distance in the Australian Jacky lizard, <Emphasis Type="Italic">Amphibolurus muricatus</Emphasis> |
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Authors: | Richard A Peters Simon J Allen |
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Institution: | (1) Centre for Visual Sciences, Research School of Biological Sciences, The Australian National University, P.O. Box 475, Canberra, Australian Capital Territory, 2601, Australia;(2) Murdoch University Cetacean Research Unit, Centre for Fish and Fisheries Research, Murdoch University, South St., Murdoch, Western Australia, 6150, Australia |
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Abstract: | Theory explains the structure of animal signals in the context of the receiver sensory systems, the environment through which
signals travel and their information content. The influence of signalling context on movement-based signalling strategies
is becoming clearer. Building upon recent findings that demonstrated changing environmental plant motion conditions resulted
in a change of signalling strategy by the Australian lizard Amphibolurus muricatus, we examined whether receiver distance also influences signalling strategies. We found that signalling lizards did not modify
their introductory tail flicking in response to distant viewers in the absence of competing, irrelevant plant image motion
despite significant reductions in signal structure at the eye of the viewer. The magnitude of resultant effect sizes strongly
suggests that receiver distance does not contribute to signalling strategies as much as the presence of motion noise in the
environment. |
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Keywords: | Amphibolurus muricatus Jacky lizard Movement-based signal Receiver distance Signal evolution Signal structure |
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