Longevity and body size in three populations of Dyscophus antongilii (Microhylidae, Dyscophinae), the tomato frog from north-eastern Madagascar

Giulia Tessa, Fabio M. Guarino, Cristina Giacoma, Fabio Mattioli, Franco Andreone

Abstract


Age profile and body size were studied in three populations of the rare and understudied tomato frog, Dyscophus antongilii, from NE Madagascar. For each individual, a phalanx was clipped and the bone used for skeletochronology. Sexual dimorphism is significantly different between all three populations: females are larger and heavier than males, with males also being distinguishable by a more yellowish throat. Age structure analysis was possible on two populations (Antara, Lampirano). The age within the two populations ranged between 3 and 7 years (mean ± SD = 5.0 ± 0.2) for males, and 3 to 11 years (mean ± SD = 5.8 ± 0.3) for females. Longevity was positively correlated to body size and weight within both sexes and populations. Sexual maturity was reached between 2 and 3 years, with sexual maturity recorded for males signifi- cantly lower than for females.

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DOI: http://dx.doi.org/10.13128/Acta_Herpetol-2218




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