Partilha de recursos e coexistência de populações sintópicas de Hyla nana e Hyla sanborni (Anura, Hylidae)

• Ano de defesa: 2002
• Autor(a) principal: Menin, Marcelo
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Uberlândia; BR; Programa de Pós-graduação em Ecologia e Conservação de Recursos Naturais; Ciências Biológicas; UFU
• Palavras-chave em Português: Anura; Sazonalidade; Sítio de vocalização; Dieta; Amplitude de nicho; Sobreposição de nicho; Sobreposição multidimensional; Ecologia animal; Anuro; Partilha de recursos (Ecologia); Nicho (Ecologia); Reproductive season; Call site; Diet; Niche breadth; Niche overlap; Multidimensional overlap; CNPQ::CIENCIAS BIOLOGICAS::ECOLOGIA
• Link de acesso: https://repositorio.ufu.br/handle/123456789/13339

Hyla nana and Hyla sanborni are closed related species that occur in sympatry in several areas in South America. Here niche breadth and overlap of both species were measured when in sympatry. The measured niche dimensions were reproductive season, call site, diet, and multidimensional overlap. Males of Hyla nana are larger than those of H. sanborni. The reproductive season of H. sanborni was longer in permanent ponds, whereas H. nana presented larger reproductive season in the temporary pond. The call site was similar for both species, however H. sanborni called from higher perches than H. nana. Dipterous (Nematocera) was the most consumed item by both species in the three ponds, but in general, H. nana ingested larger prey than H. sanborni. The consumption of prey of both species was related to their availability in the environment. The multidimensional overlap between H. nana and H. sanborni was higher in the permanent ponds than in the temporary pond, where H. sanborni was rare. These species differed in abundance among ponds, consumed prey of different sizes, and probably fed in different periods. Moreover, the data obtained suggest that the dynamic of resource partitioning change according to structural differences of the ponds. Beside the great overlap found in the major niche dimensions analyzed the detected differences may be great enough to allow their coexistence.