The British Herpetological Society

The Herpetological Journal is the Society's prestigious quarterly scientific journal. Articles are listed in Biological Abstracts, Current Awareness in Biological Sciences,Current Contents, Science Citation Index, and Zoological Record.

The 2017/18  impact factor of the Herpetological Journal is 1.268


pdf 03. Dominance and aggression in captive gidgee skinks (Egernia stokesii)

12 downloads

Subscription / purchase required

https://doi.org/10.33256/hj30.2.8392

pp. 83-92

Authors: Holly Baines, Beatrice Gini, Yu-Mei Chang & Christopher J. Michaels

Abstract: Dominance is a key component of behaviour in many animal species and is central to social system dynamics, resource acquisition, individual fitness and ultimately reproductive success. We investigated dominance interactions and social behaviours in a group of captive juvenile gidgee skinks (Egernia stokesii). We hypothesised that a dominance hierarchy existed within the group, and that aggressive behaviours would be used to secure limited resources, especially high-value
resources. We also hypothesised that body weight would be positively correlated with dominance and aggressive behaviours. We filmed the lizards at 1200 hours for six days a week over the course of eight weeks. We exposed the lizards to three different diets, which consisted of an animal-based diet (crickets), plant-based diet (plants), and a non-feeding control (no food offered). The relative value of these resources to the skinks was established through preference tests. We identified a dominance hierarchy, with dominant individuals exhibiting more aggressive behaviours than subordinates. We found that the frequency of aggressive behaviours was significantly higher in trials where high-valued resources (crickets) were at stake. Furthermore, we found a significant positive correlation between body weight and dominance, bite and chase;
larger individuals were ranked higher in the social hierarchy compared to smaller individuals. Our results demonstrate the importance of morphological and behavioural traits in determining a dominance hierarchy in E. stokesii and how dominance can have ecological advantages.

Keywords: dominance, aggression, body weight, behaviour, interaction, lizards

Download Access:

The latest 20 issues can be downloaded when logged in with a Herpetological Journal subscription membership.

Individual articles can be purchased for download.

Older issues and occasional Open Access articles are available for public download

Submissions:

For further information and submission guidelines please see our Journal Instructions to Authors

pdfBHS Ethics Policy

NOTE: as of January 2017, all new editions of the HJ are ONLY available online via the BHS website. The BHS no longer has a commercial hosting agreement with Ingenta  -  although editions prior to end 2016 remain accessible on Ingenta .  Those editions are of course also accessible on the BHS website for subscribers with an active and valid membership.  Should you experience any difficulty accessing HJ editions via the website or have any queries in this regard, please contact