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Determinants of home range and activity in two semi-aquatic lizards

Smith, Jeff and Griffiths, A (2009). Determinants of home range and activity in two semi-aquatic lizards. Journal of Zoology,279(4):349-357.

Document type: Journal Article

IRMA ID 75039815xPUB68
Title Determinants of home range and activity in two semi-aquatic lizards
Author Smith, Jeff
Griffiths, A
Journal Name Journal of Zoology
Publication Date 2009
Volume Number 279
Issue Number 4
ISSN 1469-7998   (check CDU catalogue open catalogue search in new window)
Scopus ID 2-s2.0-70949105099
Start Page 349
End Page 357
Total Pages 9
Place of Publication United Kingdom
Publisher Wiley-Blackwell Publishing Ltd.
HERDC Category C1 - Journal Article (DEST)
Abstract By living in close proximity to waterbodies, semi-aquatic varanids may be able to sustain activity and maintain relatively smaller home ranges than their terrestrial counterparts because of access to important resources (food and water) that are less abundant in terrestrial systems during dry seasons. The factors influencing home range and movement were examined in two semi-aquatic Australian varanids, Varanus mertensi and Varanus indicus. We used radio-telemetry and mark-recapture techniques to examine differences in space use between sexes, seasons and body sizes in the top end of the Northern Territory of Australia. Both V. mertensi and V. indicus were active throughout the year, unlike terrestrial varanids in this region. Varanus indicus had small home ranges when compared with other similar sized varanids, whereas the home ranges of V. mertensi varied substantially. Body size influenced the home range of V. indicus, with larger animals having larger home ranges, but not for V. mertensi. An interaction between body size and gender influenced the distance V. indicus moved, whereas interactions between body size, gender and seasonality all influenced the distance that V. mertensi moved.
Keywords varanid
home range
linear modelling
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Created: Thu, 18 Mar 2010, 19:02:55 CST