Banca de QUALIFICAÇÃO: EMERSON GONCALVES DIAS

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
DISCENTE: EMERSON GONCALVES DIAS
DATA : 26/01/2023
LOCAL: VIDEOCONFERÊNCIA
TÍTULO:

The acoustic repertoire of Physalaemus caete (Anura, Leiuperinae), a threatened and highly endemic frog of the northern Atlantic Forest of Brazil

PALAVRAS-CHAVES:

Amphibia. Advertisement call. Behavior. Bioacoustics. Communication. Vocalization.

PÁGINAS: 20
RESUMO:

The complexity of the vocal repertoire varies across anuran species, with some species using a single call type to mediate both aggressive and sexual interactions and other species using different acoustic signals to mediate specific behavioral interactions in reproductive, aggressive or defensive contexts. Understanding the full array of sound signals that form the vocal repertoire of a species is a crucial first step towards more comprehensive studies about its behavioral ecology and natural history. In this study, we describe the complex acoustic repertoire of Physalaemus caete, an endangered ground-dwelling frog distributed in small remnants of the northern Atlantic Forest of Brazil. We characterize the call types that form its vocal repertoire in terms of shape of the sound envelope, harmonic structure, temporal and spectral call properties, based on recordings of 24 males recorded in two forest fragments. Additionally, we evaluate similarity among different call types using cluster analyses, investigate advertisement call traits potentially useful for individual recognition based on analyses of coefficients of variation and test for effects of body-size, temperature and humidity on advertisement call variation. We identified 11 call types, assigned to six behavioral subcategories distributed among reproductive, aggressive (territorial) and defensive contexts. Cluster analysis indicated advertisement calls and some territorial calls as moderately similar in relation to temporal and spectral parameters, suggesting gradation between these call types. The fundamental frequency and the position of the most emphasized harmonic were considered the parameters potentially most useful for individual discrimination among males. However, variation of the fundamental frequency was influenced by variation in temperature and humidity, which may end up affecting its use for individual recognition. We discuss our findings in the light of future implementation of passive acoustic monitoring protocols which have been increasingly used in conservation of endangered species.

MEMBROS DA BANCA:
Externa à Instituição - MANOELA WOITOVICZ CARDOSO
Interna - 2088859 - BRUNA MARTINS BEZERRA
Interno - ***.401.405-** - JOÃO PEDRO SOUZA ALVES - UFPE
Presidente - 3091544 - PEDRO IVO SIMOES