Comportamento de vocalização de machos de Hypsiboas goianus (Lutz,1968) (Anura; Hylidae): variabilidade acústica ao longo de estações reprodutivas e resposta a indivíduos coespecíficos
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2017-03-13
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Universidade Federal de Goiás
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During the reproductive season, the anurans crowd in sites where they can constitute vocalization
assemblies. Different social contexts occur during these occasions, where the male individuals
modify actively their behavior between attracting the female individuals and defending their
territory and resources. Of huge importance for the social interaction of anurans, their vocalization
acts as a tool for studies about sexual selection and aggressive interactions. Thereby, we aimed to
evaluate the temporal variation of the advertisement and aggressive calls of Hypsiboas goianus
over the course of 10 reproductive seasons that amount 18 years of time-lapse in a population and
the acoustic answer of focal males in repeated interactions with conspecific competitors. The
records were performed in Floresta Nacional de Silvânia, city of Silvânia, Goiás, Brazil. For
temporal analysis, five advertisement calls and five aggressive calls – at most – of each individual
were analyzed. Temporal parameters (duration of call, number and duration of pulses, call and
pulse repetition rate) and a spectral parameter (dominant frequency) were extracted. To analyze the
competitive interactions, the repetition rates of the advertisement, aggressive and total calls were
considered as a response to the conspecific advertisement calls offered in 10 periods of playback.
The acoustic parameters do not diverge inside the temporal lapse that was analyzed. The
individuals modified their acoustic behavior with the simulation of the arrival of a new competitor
during the first interactions with the playback (playback 1 e 2), afterward, the repetition taxes of
calls were similar to those observed in the pre-playback period were, once again, emitted.
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ANDREANI, T. L. Comportamento de vocalização de machos de Hypsiboas goianus (Lutz,1968) (Anura; Hylidae): variabilidade acústica ao longo de estações reprodutivas e resposta a indivíduos coespecíficos. 2017. 73 f. Dissertação (Mestrado em Biodiversidade Animal) - Universidade Federal de Goiás, Goiânia, 2017.