The British Herpetological Society

The Herpetological Journal is the Society's prestigious quarterly scientific journal. Articles are listed in Biological Abstracts, Current Awareness in Biological Sciences,Current Contents, Science Citation Index, and Zoological Record.

 

ISSN 0268-0130


pdf 03. Seasonal and hourly patterns of reproductive activity in Scinax trapicheiroi (Anura, Hylidae), Rio de Janeiro State, South-eastern Brazil

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pp. 15-20
Authors: Van Sluys, Monique; Rico, Miguel & Rocha, Carlos F. D.

Abstract: We examine the temporal pattern of reproduction of the hylid Scinax trapicheiroi and evaluate how environmental factors affect the calling activity of males and the reproductive activity of females. Fieldwork was carried out at a small stream inside the Atlantic Rainforest of Ilha Grande, an island off the coast of south-eastern Brazil. The study area was sampled monthly from October 2000 to September 2001. Periods for quantifying males' calling activity were alternated with periods of observing female presence. Calling activity occurred mainly during the night. Males called during all months of the year, but activity was higher during the warm wet season. The number of calling males positively influenced the number of calls emitted per male. Fewer females appeared at the stream to reproduce than males. The presence of females was affected only by rainfall during the previous day.

Keywords: ENVIRONMENTAL FACTORS, ATLANTIC RAINFOREST, BEHAVIOUR, CALLING ACTIVITY, FROG

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