A bioacústica no estudo de Galliformes ameaçados

• Ano de defesa: 2024
• Autor(a) principal: Martins, Bruno Araújo
• Orientador(a): Cascon, Paulo
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Área do conhecimento CNPq: CNPQ::CIENCIAS BIOLOGICAS::ECOLOGIA
• Link de acesso: http://repositorio.ufc.br/handle/riufc/88013

Galliformes is an order of birds with a near-cosmopolitan distribution, inhabiting various environments. In Brazil, many populations of Galliformes are threatened with extinction due to hunting and habitat loss, making it essential to gather population and ecological data on them. In the first chapter of this thesis, we describe the vocal repertoire of the galliform Odontophorus capueira, a species endemic to the Atlantic Forest and high- altitude marshes of northeastern Brazil. Recordings and visual records were made in the Serra de Baturité, in the state of Ceará, and vocalizations from sound archives and captive individuals were also analyzed. In total, eight vocalizations used in activities such as territorial defense, predator alert, and social cohesion were described. These vocalizations were shown to be effective in generating behavioral responses, having distinct semantic structures that facilitate efficient acoustic communication.In the second chapter, we conducted acoustic monitoring of the populations of three Galliformes species: Odontophorus capueira, Penelope jacucaca, and Penelope superciliaris, to assess the population status of these threatened taxa. Six forest fragments were selected, with sampling at five points per fragment, using recorders that captured ambient sound for 24-hour periods at each point. In total, 8,640 hours of acoustic landscape were obtained, resulting in 60 records of the target Galliformes: 53 of P. jacucaca, three of P. superciliaris, and four of O. capueira plumbeicollis. The population data of the target species were concerning.Penelope jacucaca showed a recording frequency of 14%, being the only species recorded in all sampled areas. Penelope superciliaris was the least detected species, recorded in only two areas, with a frequency of 0.8%. Odontophorus capueira had a low recording frequency (1%), with four detections in two areas. The low recording frequency of these species demonstrates their reduced occupancy and low density in the Serra de Baturité, with fragmented populations throughout the areas of occurrence. This information on communication and occupancy is essential for future conservation actions, aiming to reverse the vulnerable situation of these species.