RESUMO:A família Leptodactylidae depositam seus ovos em ninhos de espuma, que dentre outras funções, poderiam participar da manutenção de temperaturas adequadas para o desenvolvimento de ovos, embriões e larvas. O trabalho estudou as variações térmicas entre os ninhos de oviposição de Leptodactylus labyrinthicus e ar externo. Foram realizadas medidas de temperatura do ar, a 10 cm e do fundo da espuma para 4 ninhos nos seguintes períodos: 10h; 14h; 18h e 22h horas de um único dia. As temperaturas do ar mostraram-se significativamente acima daquelas do fundo dos ninhos, exceto para o período das 22h horas, mostrando-se iguais. As temperaturas do fundo não diferiram entre si para os períodos das 12he 22h horas. Conclui-se que os ninhos de espuma de L. labyrinthicus mantiveram suas temperaturas internas a valores abaixo dos atmosféricos externos.Palavras-Chave: Temperatura do ar. Temperatura do fundo dos ninhos. Reflexão de luz. Bolhas de ar. SUMMARY:The Leptodactylidae family lay their eggs in foam nests, which, among other functions, could participate maintaining appropriate temperatures for the development of eggs, embryos and larvae. The work studied the thermal variations between the nests of oviposition of Leptodactylus labyrinthicus and outside air. Measurements of air temperature at 10 cm above and the bottom of the foam to four nests were conducted during the following periods: 10h; 14h; 18h and 22h hours of a single day. Air temperatures were significantly above those of the bottom of the nest, except for the period from 22h, being equal. The temperatures of the background did not differ for the periods 12hand 22h hours. It is concluded that the foam nests of L. labyrinthicus kept their internal values below the external atmospheric temperatures.
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