Geographic structure and acoustic variation in populations of Scinax squalirostris (A. Lutz, 1925) (Anura: Hylidae)
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2013-12
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Resumo
The advertisement call contains spectral and temporal information, which are used by frogs in
different social contexts. We analysed the variation of advertisement calls among eleven populations of Scinax
squalirostris along its broad distribution area, examining geographical patterns (latitude, longitude and
altitude) related to this variation. We found that parameters responsible for advertisement call variation
among populations were call duration and number of pulses. Individuals from Cristalina municipality (state
of Goiás, Brazil) showed the greatest amount of differences in acoustic parameters among populations
studied, suggesting that it could even be a distinct species. We found a geographic pattern between dominant
frequency and latitude, with lower values found further north. The variability of call parameters of S.
squalirostris populations was not explained by geographic distance alone, suggesting that stochastic events,
such as vicariance and/or local selective pressures could have influenced their vocal repertoire historically.
Descrição
v. 9, p. 329-336, dez. 2013.
Palavras-chave
Advertisement call, Geographic pattern, Geographical distance
Citação
FARIA, Daniele Carvalho do Carmo; SIGNORELI, Luciana; MORAIS, Alessandro Ribeiro; BASTOS, Rogério Pereira; MACIEL, Natan Medeiros. Geographic structure and acoustic variation in populations of Scinax squalirostris (A. Lutz, 1925) (Anura: Hylidae). North-Western Journal of Zoology, v. 9, p. 329-336, Dec. 2013. Disponível em : <http://biozoojournals.ro/nwjz/content/v9n2/nwjz.131514.Faria.pdf>.