. Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn. Biology; Zoology. Bonner zoologische Beiträge 56 269. Fig. 12. Proflies of Tg in gravel plain in spring (solid line) and summer (dashed line). a. 60 40 20 0 120 T 100 «0 SubaduKs AdultB 60 40 20 ' . JT^ --^ 0 J sgsgssssssa 8 3 8 «... - . I . i à i i $ i i i i i b. 60 40 - 20 0 120 Adults (AHJ^ Ad. 100 ao 60 40 20 n 0 . â - - Jl _ n ^ i i i i i S i i Ã- 3 i !3|!|3;3||| Fig. 13. Estimation of Uromastyx Tj, based on average T^; a. Spring; b. Summer; T^. burrow entrance (approx. 40 c
. Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn. Biology; Zoology. Bonner zoologische Beiträge 56 269. Fig. 12. Proflies of Tg in gravel plain in spring (solid line) and summer (dashed line). a. 60 40 20 0 120 T 100 «0 SubaduKs AdultB 60 40 20 ' . JT^ --^ 0 J sgsgssssssa 8 3 8 «... - . I . i à i i $ i i i i i b. 60 40 - 20 0 120 Adults (AHJ^ Ad. 100 ao 60 40 20 n 0 . â - - Jl _ n ^ i i i i i S i i Ã- 3 i !3|!|3;3||| Fig. 13. Estimation of Uromastyx Tj, based on average T^; a. Spring; b. Summer; T^. burrow entrance (approx. 40 cm deep); Tg gravel plain; sandy plain most identical minimum values but slightly higher max- ima at summer (Tab. 1). The main observed differences lie in the temperatures of the Uromastyx burrow entrance and in the profiles of T^ in spring and summer (for the pro- file of Tg in the gravel plain see Fig. 12). During spring, temperatures in the entrance of the burrow differ between hrs and hrs about ten degrees centigrade while in summer this variation accounts only to three degrees. The profiles of mean Tg g^avei plain spring and summer are quite similar until hrs. After that time Tg rises faster in summer and reaches a higher maximum than in spring. Afternoon Tg in summer remains significantly higher until sunset (see Fig. 12). Based on the combined visibility/activity profiles and the mean Tg for the respective seasons, body temperatures (T;,) for the first specimens seen outside of their burrows are estimated to be around 30-31 °C in spring and 33 °C in summer (because all specimens observed on the transects have been found in a gravel or in a mixed gravel/sandy microhabitat we suppose that is within the range of Tg sandy plain and Tg â,,,g| ,,,,â). T^ cstimatcs for specimens ob- served active far from their burrows are 44-52 °C for subadults and 48-54 °C for adults in spring and 47-55 °C for adults in summer (only adult specimens
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