However, in 1992 we captured females from both nesting areas, and we incubated 21 clutches from females nesting in varanid burrows and 29 clutches from paperbark nesters (Table 1).
Eggs inside paperbark root holes and in the reed-bed nest experienced cooler and more variable temperatures than did eggs inside varanid burrows.
The snakes maintained very stable body temperatures while they were ovipositing in varanid burrows [ILLUSTRATION FOR FIGURE 2 OMITTED] because of the stable environmental temperatures in this microhabitat [ILLUSTRATION FOR FIGURE 1 OMITTED].
We have detailed data on the temperatures of eight gravid females that oviposited in varanid burrows after moving from burrow to burrow during the 2 wk preceding oviposition.
Females from the varanid burrows were larger than those from the paperbark.
A female that remained with her clutch in the reed beds throughout incubation (67 d) in 1992 deserted her subsequent clutch (laid in a varanid burrow) [less than]2 days after oviposition.
The single exception (number 3497) was captured when gravid in the paperbarks in 1993 and recaptured beside a varanid burrow 3 km away in 1995.
The varanid lizards in this study are mobile with home ranges that encompasses many types of micro-habitat (Green and King 1978, Shine 1986, Christian and Weavers 1994).
The result indicating that some tropical varanid species appear to thermoregulate more carefully than others in the same habitat is intriguing.
The radiotelemetric measurements of time spent in locomotion do not provide any measurement of the intensity of activity, but with respect to the time spent in locomotion, the only direct measurement of extremely high levels of activity by any varanid is for V.
e] in the sun is greater than the set-point range, such as the open woodland and floodplains inhabited by the varanid lizards of this study.
Size, body temperature, thermal conductance, oxygen consumption, and heart rate in Australian varanid lizards.
Activity and resting metabolism of varanid lizards compared to "typical" lizards.
Seasonal activity and energetics of two species of varanid lizards in tropical Australia.
In the present study, we used three Clayson 10-step programmable incubators to simulate (1) varanid
burrow nests (constant 32 [degrees] C), (2) paperbark nests with maternal attendance (fluctuating in a sinusoidal curve from 27.