IBIGEO   22622
INSTITUTO DE BIO Y GEOCIENCIAS DEL NOA
Unidad Ejecutora - UE
artículos
Título:
Gonadal development in the Neotropical high Andean frog Dendropsophus labialis (Amphibia: Hylidae)
Autor/es:
PINTO-ERAZO MA; JEREZ A; GOLDBERG, J.
Revista:
CUADERNOS DE HERPETOLOGíA
Editorial:
ASOCIACIÓN HERPETOLÓGICA ARGENTINA
Referencias:
Lugar: San Miguel de Tucumán; Año: 2016
ISSN:
0326-551X
Resumen:
Amphibians are one of the most threatened groups of vertebrates whose populations are decliningdue to many reasons including, among others, the presence of chemicals associated withhuman intervention and in particular, with agriculture. These chemicals are deposited whereamphibian larvae develop provoking morphological abnormalities in different organs, such asthe gonads, which have been used as biological indicators of these chemicals in the environment.Therefore, descriptions of normal gonadal development among anurans are important not onlyto increase our knowledge about the reproductive biology of species but also to identify thetype of gonadal abnormalities. The main objective of this work was to describe the morphologicalchanges that occur during gonadal differentiation in the Neotropical high Andean frogDendropsophus labialis, an endemic species from the Eastern Andes of Colombia. We analyzed211 individuals including larvae and adults. This species has a differentiated pattern of gonadaldevelopment and accelerated rates of ovary and testis differentiation since mature oocytes andseminiferous tubules are present during pre-metamorphic larval stages. In comparison withother phylogenetically related species, D. labialis has one of the most accelerated rates of gonadaldifferentiation described so far. We confirmed that the gonadal development is to somedegree independent of somatic development and we described a case of a gonadal abnormality.