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Lizards assess complex social signals by lateralizing colour but not motion detection

Batabyal, Anuradha and Thaker, Maria (2018) Lizards assess complex social signals by lateralizing colour but not motion detection. In: JOURNAL OF EXPERIMENTAL BIOLOGY, 221 (5).

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Official URL: http://dx.doi.org/10.1242/jeb.173252

Abstract

Vertebrates lateralize many behaviours including social interactions. Social displays typically comprise multiple components, yet our understanding of how these are processed comes from studies that typically examine responses to the dominant component or the complex signal as a whole. Here, we examined laterality in lizard responses to determine whether receivers separate the processing of motion and colour signal components in different brain hemispheres. In Psammophilus dorsalis, males display colours that dynamically change during courtship and aggressive interactions. We tested the visual grasp reflex of both sexes using robotic stimuli that mimicked two signal components: (1) multiple speeds of head-bobbing behaviour and (2) multiple colours. We found no laterality in response to different motion stimuli, indicating that motion similarly attracts attention from the two visual fields across sexes. Notably, receivers showed left visual field dominance to colours, especially when males were exposed to `aggression-specific' colours and females to `courtship-specific' colours.

Item Type: Journal Article
Additional Information: Copy right for the article belong toCOMPANY OF BIOLOGISTS LTD, BIDDER BUILDING CAMBRIDGE COMMERCIAL PARK COWLEY RD, CAMBRIDGE CB4 4DL, CAMBS, ENGLAND
Department/Centre: Division of Biological Sciences > Centre for Ecological Sciences
Depositing User: Id for Latest eprints
Date Deposited: 03 Apr 2018 18:27
Last Modified: 03 Apr 2018 18:27
URI: http://eprints.iisc.ac.in/id/eprint/59454

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