Abstract
The relationship between Australian sleepy lizard (Tiliqua rugosa) microhabitat use and tick (Amblyomma limbatum) population dynamics was investigated. Over 3 years (2002–2004) between 23 and 50 lizards were radio-tracked up to four times a week to record microhabitat use and each fortnight to determine tick loads. Daily maximum temperature was highly predictive of lizard microhabitat use. In hotter fortnights lizards used larger bushes and burrows for refuge. Peak background tick infestation levels and pulses of attachment coincided with higher ambient temperature. Male ticks attached throughout the year independent of season. Engorged females detached late in spring, summer and autumn, when climate regularly restricted lizards to a few thermally conservative refuges. Peak nymph and larval attachment occurred over summer and into autumn. Climate-dependent timing and type of host refuge use may influence tick population density. In more temperate summers lizards may avoid refuges with potentially high parasite loads.
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Acknowledgements
We would like to thank Ron and Leona Clark for allowing us access to their land and use of the homestead at Bundey Bore Station. The Australian Research Council and the Nature Foundation SA Inc. funded this research. The study was conducted according to the guidelines of the Flinders University Animal Welfare Committee in compliance with the Australian Code of Practice for the use of animals for scientific purposes.
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Kerr, G.D., Bull, C.M. Interactions between climate, host refuge use, and tick population dynamics. Parasitol Res 99, 214–222 (2006). https://doi.org/10.1007/s00436-005-0110-y
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DOI: https://doi.org/10.1007/s00436-005-0110-y