Descripción
A sample of
88 (45 female and 43 males) adults and subadults toads of Bufo arenarum has
been collected in Buenos Aires province, Argentina. There has been studied the
age and increments in growth by the squeletochronological method in the
subdistal phalange of the third finger from the hand. Statistical regression
analysis (linear and power models) were perfomed. These studys showed that: a)
snowt-vent (total lenght, LT=y) and head width (AC=y) have a strong positive
correlation to the estimate age (number of LAC present in the bone; E=x). The
power model shows the best fitting to the female data and the linear model
provide good fits to the male data. All correlation coefficients are
statistically significant at 0,01 probability level. b) The equation of von
Bertalanffy was fitted to the data (LT; AC): Males growth showed a weak fitting
to von Bertalanffy. Female corporal growth (LT and AC) showed the best fitting
to von Bertalanffy equation. It can be used 90-110 mm as the length at sexual
maturity (or sexual maturity size). c) The endosteal resorption begings before
males reach the sexual maturity (E IV). In the females the endosteal resorption
starts after the sexual maturity (E V). d) The third LAC could be completely
resorbed at E VI.
Filipello, A. & Echevarría, D. (1990). Edad y crecimiento en Bufo arenarum (Anura: bufonidae). Cuadernos de Herpetología, 5 (5), pp. 25-31
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