Estrutura do habitat influencia a tolerância climática e frequênc ia dominante do canto de anúncio do gênero Rhinella (Anura: Bufonidae)?
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2019-05-30
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Universidade Federal de Goiás
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The biological evolution occurs over time with the selection of the attributes that most favor the
species, and can be influenced, for example, by the structural characteristics of the habitat. These
structures affect local climatic conditions, as well as acoustic signals used by organisms such as
frogs. Moreover, body size also influences the association between habitat structure and climatic
conditions and sound signals. Thus, this study evaluated how climate tolerance and the dominant
frequency of the advertisement call are affected by the habitat in the genus Rhinella, which
presents species of toads exclusive to open and forested areas. The prediction was that in open
areas there would be a pattern of species with smaller body sizes, with greater climatic tolerance
and dominant frequency when compared to the species of forested areas. Habitat type, dominant
frequency and body size data were obtained from published studies, while the climate tolerance
was generated by the OMI (Outlying Mean Index). The inferences were made using a pathphylogenetic
analysis evaluating the direct effect of habitat and the association of body size on
climate tolerance and dominant frequency. The climatic tolerance among Rhinella species was
independent of phylogenetic relationships (λ = 0) and habitat (R² = 0.08, P = 0.28). The dominant
frequency of advertisement call is associated with habitat (R² = 0.19, P = 0.04), which indirectly
together with body size account for 18% of the acoustic parameter variation in the habitat. Thus,
the size of the body and the dominant frequency in the genus Rhinella are attributes that vary in
association with their habitats.
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ARAÚJO, D. M. Estrutura do habitat influencia a tolerância climática e frequência dominante do canto de anúncio do gênero Rhinella (Anura: Bufonidae)?. 2019. 34 f. Dissertação (Mestrado em Ecologia e Evolução) - Universidade Federal de Goiás, Goiânia, 2019.