Structure of the femora and autotomous (postpygal) caudal vertebrae in the three-toed skink Chalcides chalcides (Reptilia: Squamata: Scincidae) and its applicability for age and growth rate determination

摘要: Abstract The limbs of the three-toed skink Chalcides chalcides are reduced to such a degree that three digits too small for skeletochronology. This study, performed on animals collected near Isernia (central Italy), describes structure caudal vertebrae, which often naturally lost due autotomy, in order determine whether they can be used obtain data age and growth with skeletochronological techniques. reliability autotomous vertebrae skeletochronology was verified by performing analyses also femora. Although identification lines arrested (LAGs) easier femora than high correspondence LAG count between two bones observed. Females were larger lived longer males (4 3 years, respectively). For both sexes, snout vent length (SVL) significantly correlated age. sexual maturity attained after hibernations from birth, beginning at 20th month At first reproduction, had an SVL 91–106 mm females one 111–150 mm. Von Bertalanffy curves versus showed slower rates attaining their asymptotic (females: 197 mm; males: 143 mm). results provide C. chalcide, show reliable alternatives obtaining limb-reduced reptiles, avoiding need sacrifice or disable animals, as occurs when long used.