Geographic variation of the advertisement call of the frog Eleutherodactylus nitidus (Anura: Eleutherodactylidae) in central Mexico
Date
2023-01
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Benemérita Universidad Autónoma de Puebla
Abstract
"Geographic variation in acoustic characteristics of anuran advertisement calls could be an important key for species divergence due to its importance for specie recognition within and among populations. In this study, we evaluate the geographic variation of 1676 advertisement calls of 66 individuals of Eleutherodactylus nitidus (Peters 1870) throughout six populations distributed in central Mexico. Additionally, we evaluate the influence of body size and environment on call variation. We compared six acoustic variables using ANOVA and linear discriminant analysis, as well as inter- and intra-population and intra individual variation estimates to understand E. nitidus call variation. Advertisement calls were corrected for environmental and body size factors to rule out their influence on call variation. The results indicated that call duration, call intensity, dominant frequency, crests per call and highest crest differ between populations and such differences are independent of body size and environment. Additionally, Wilks’ Lambda criterion applied to the linear discriminant analysis indicated that geographic call variation depends principally on call intensity. We concluded that, distance-separating populations of E. nitidus mainly determine differences between them due to divergence processes".
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