O presente estudo foi realizado na Reserva Biologica do Lami (30o 15 S; 51o 05 W), uma area com aproximadamente 179 ha localizada no municipio de Porto Alegre, Brasil. As atividades de campo compreenderam visitas bimensais a tres banhados... more
O presente estudo foi realizado na Reserva Biologica do Lami (30o 15 S; 51o 05 W), uma area com aproximadamente 179 ha localizada no municipio de Porto Alegre, Brasil. As atividades de campo compreenderam visitas bimensais a tres banhados semi-permanentes, com duracao aproximada de dois dias e duas noites cada, entre agosto de 2004 e julho de 2005. Observamos diferencas nos sitios utilizados por machos, femeas e juvenis, com machos ocupando locais mais profundos e mais distantes da margem. A distribuicao temporal dos individuos, vocalizacoes e amplexos indicaram que, no local de estudo, a reproducao de P. minutus e estacional prolongada, e regulada por fatores abioticos. Os machos em atividade de vocalizacao apresentaram diferenca significativa em relacao os machos nao vocalizantes para todos os fatores abioticos diarios analisados (temperatura do ar, temperatura da agua, umidade relativa do ar e pluviosidade), bem como na temperatura do ar e pluviosidade mensais. A quantidade de ma...
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Dendropsophus nahdereri is included in the Dendropsophus marmoratus group. Its distribution is known from the Brazilian states of Paraná and Santa Catarina. Here we report new records of this species and briefly describe the habitat of... more
Dendropsophus nahdereri is included in the Dendropsophus marmoratus group. Its distribution is known from the Brazilian states of Paraná and Santa Catarina. Here we report new records of this species and briefly describe the habitat of calling males. We found new localities of occurrence of D. nahdereri in Brazilian states of Santa Catarina and Rio Grande do Sul. We collected calling males in temporary lentic water bodies surrounded by arboreal vegetation, inside and on the border of native forest, and inside Pinus plantations near native forest.
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We studied the reproductive biology of a population of Pseudis minuta Günther, 1858 from Reserva Biológica do Lami (30º 15' S; 51º 05' W), Porto Alegre, southern Brazil. We assessed the spatial and temporal distribution of... more
We studied the reproductive biology of a population of Pseudis minuta Günther, 1858 from Reserva Biológica do Lami (30º 15' S; 51º 05' W), Porto Alegre, southern Brazil. We assessed the spatial and temporal distribution of individuals (males, females, juveniles) and explored potential relationships with environmental variables. Field activities encompassed bimonthly surveys in three semi-permanent ponds, each one during approximately two days and two nights, from August 2004 to July 2005. We recorded differences in the sites used by males, females and juveniles, with males occupying deeper and more distant places from the border. The temporal distributions of individuals, calling sites and amplectant pairs indicated that the reproductive activity of P. minuta is related to some of the studied abiotic factors. Calling males presented statistical differences in relation to non-calling males for all daily abiotic variables analyzed (air temperature, water temperature, relative ...