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1 December 2015 Sexual Size Dimorphism and Age in Odontophrynus cf. barrioi (Anura: Odontophrynidae) from the Monte Desert, Argentina
Lorena Beatriz Quiroga, Eduardo Alfredo Sanabria, Federico Marangoni
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Abstract

Current knowledge on sexual dimorphism and population structure in the genus Odontophrynus is limited. We studied age structure, age at maturity, and longevity in Odontophrynus cf. barrioi, with skeletochronology. We also determined whether sexual dimorphism in body size exists in this species, and evaluated its relation to demographic life history traits. We found that females were larger in four variables corresponding to the morphology of the head. In addition, females of O. cf. barrioi have a longer tibia-fibula and femur than males. Nevertheless, Odontophrynus cf. barrioi shows no sexual dimorphism in snout–vent length. We suggest the possibility that sexes have different growth trajectories after the onset of reproduction, as they are exposed to different selection pressures, or even predation rate, because of size differences.

Copyright 2015 Society for the Study of Amphibians and Reptiles
Lorena Beatriz Quiroga, Eduardo Alfredo Sanabria, and Federico Marangoni "Sexual Size Dimorphism and Age in Odontophrynus cf. barrioi (Anura: Odontophrynidae) from the Monte Desert, Argentina," Journal of Herpetology 49(4), 627-632, (1 December 2015). https://doi.org/10.1670/13-216
Accepted: 1 November 2014; Published: 1 December 2015
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