A face in the crowd: a non-invasive and cost effective photo-identification methodology to understand the fine scale movement of eastern water dragons.
Ectothermic vertebrates face many challenges of thermoregulation. Many species rely on behavioral thermoregulation and move within their landscape to maintain homeostasis. Understanding the fine-scale nature of this regulation through tracking techniques can provide a better understanding of the relationships between such species and their dynamic environments. The use of animal tracking and telemetry technology has allowed the extensive collection of such data which has enabled us to better understand the ways animals move within their landscape. However, such technologies do not come without certain costs: they are generally invasive, relatively expensive, can be too heavy for small sized animals and unreliable in certain habitats. This study provides a cost-effective and non-invasive method through photo-identification, to determine fine scale movements of individuals. With our methodology, we have been able to find that male eastern water dragons (Intellagama leuseurii) have home ranges one and a half times larger than those of females. Furthermore, we found intraspecific differences in the size of home ranges depending on the time of the day. Lastly, we found that location mostly influenced females' home ranges, but not males and discuss why this may be so. Overall, we provide valuable information regarding the ecology of the eastern water dragon, but most importantly demonstrate that non-invasive photo-identification can be successfully applied to the study of reptiles.
GeneCology Research Centre, University of the Sunshine Coast, Maroochydore DC, Queensland, Australia.
Riana Zanarivero
RZ
Gardiner
GeneCology Research Centre, University of the Sunshine Coast, Maroochydore DC, Queensland, Australia.
Erik
E
Doran
GeneCology Research Centre, University of the Sunshine Coast, Maroochydore DC, Queensland, Australia.
Kasha
K
Strickland
Centre for Ecology and Conservation, College of Life and Environmental Sciences, University of Exeter, Cornwall Campus, Falmouth, United Kingdom.
Luke
L
Carpenter-Bundhoo
GeneCology Research Centre, University of the Sunshine Coast, Maroochydore DC, Queensland, Australia; School of Biological Sciences, The University of Queensland, St Lucia, Queensland, Australia.
Celine
C
Frère
D000823:Animal Identification Systems / Q000379:methods*; D000818:Animals; D001833:Body Temperature Regulation / Q000502:physiology*; D005260:Female; D006702:Homing Behavior / Q000502:physiology; D008116:Lizards / Q000502:physiology*; D008297:Male; D009043:Motor Activity / Q000502:physiology*; D010781:Photography / Q000379:methods*; D011793:Queensland; D012737:Sex Factors; D013997:Time Factors