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A Population Study of the Viviparous Australian Lizard, Trachydosaurus rugosus (Scincidae)
C. M. Bull
Vol. 1987, No. 3 (Aug. 5, 1987), pp. 749-757
Stable URL: http://www.jstor.org/stable/1445669
Page Count: 9
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A population of the Australian scincid lizard Trachydosaurus rugosus, a large species whose adult snout-vent length can exceed 30 cm, was studied at Tickera in South Australia between 1975 and 1982. The population density remained relatively stable at 2-3 lizards/ha over the study period. The majority of recaptured lizards were within 100 m of their original capture site, even over periods of 6 yr between captures. Each year a proportion of the population consisted of new adults moving through the area. Mating occured in spring (Sept.-Nov.), which was also the time when lizards were most active. Live young (1-3 per female) were born the following autumn (Feb.-March). Growth rate data from recaptured individuals indicated that a lizard can reach maturity by its third spring season at an approximate age of 30 mo. Longevity could not be assessed, but many lizards were at least 9 yr old by the end of the study.