Foam nest construction and first report of agonistic behaviour in Pleurodema tucumanum (Anura: Leptodactylidae)

2019 
portuguesEstrategias reprodutivas sao combinacoes de caracteristicas fisiologicas, morfologi-cas e comportamentais que interagem para aumentar o sucesso reprodutivo em cer-tas condicoes ambientais. Embora as estrategias reprodutivas do Leiuperinae sejam conhecidas, poucos estudos foram realizados sobre os comportamentos reprodutivos que as sustentam. O objetivo deste trabalho foi documentar as caracteristicas estru-turais dos micrositios de oviposicao, descrever o processo de construcao do ninho de espuma e registrar a presenca de comportamento agonistico e de coro em machos de Pleurodema tucumanum. Os ninhos foram encontrados proximos as margens de uma poca temporaria e a temperatura media dos ninhos de espuma esteve sem-pre proxima da temperatura media da agua. Nossas observacoes corroboram que as fases de construcao do ninho de espuma para P. tucumanum sao similares aquelas descritas para outros Leiuperinae, incluindo a dispersao e o batimento da espuma realizada pelos membros posteriores do macho. Tambem registramos pela primeira vez a observacao de encontros agonisticos entre machos de Pleurodema tucumanum. Palavras-chave: Anfibios, Chaco Seco, Interacoes entre machos, modo reprodutivo, sitio de oviposicao. EnglishReproductive strategies are the combination of physiological, morphological, and behavioural traits interacting to increase species reproductive success within a set of environmental conditions. While the reproductive strategies of Leiuperinae are known, few studies have been conducted regarding the reproductive behaviour that underlies them. The aim of this study was to document the structural characteristics of nesting microsites, to describe the process of foam nest construction, and to explore the presence of male agonistic and chorus behaviour in Pleurodema tucumanum. Nests were found close to the edge of a temporary pond and the mean temperature of the foam nests was always close to the mean temperature of the pond water. Our observations corroborate that the foam nest construction phases for P. tucumanum are similar to those described for other Leiuperinae, including dispersion and the beating of the foam, realized by male hind limbs. We also recorded the first scientific observations of male agonistic encounter in Pleurodema tucumanum.
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