Vocal repertoire and variability in the advertisement call of Ololygon goya Andrade, Santos, Rocha, Pombal & Vaz-Silva 2018 (Anura: Hylidae): influence of climatic and morphological attributes

Most anuran species exhibit complex vocal behavior, capable of producing a variety of sounds that are used, primarily, in the context of mating and resource defense. Understanding how acoustic traits vary among individuals and respond to climatic and morphological factors is fundamental for interpreting the evolution of acoustic communication and individual recognition in anurans. Herein, we observed the acoustic behavior of Ololygon goya, and we describe two types of aggressive calls of this species. In addition, the influence of air temperature and humidity and morphological attributes on the acoustic parameters of advertisement call was tested. Air temperature had a negative relationship with call duration and body condition had a negative relationship with dominant frequency. The temporal parameters of advertisement calls were classified as dynamic properties, while the dominant frequency was considered a static property. The variability among-male was greater than the variability within-male. These findings indicate that dominant frequency is a stable acoustic trait with potential to mediate individual recognition in this species. Our findings expand the current knowledge of acoustic communication in Ololygon and provide a basis for future comparative studies on the evolution of vocal repertoires and acoustic recognition systems in Neotropical frogs.