The feeding ecology and the sazonal variation in capture frequencies of anurans in two localities of Central Brazil was studied. The anuran capture frequencies were analysed counting specimen numbers collected in pitfall traps during the dry and rainy seasons. Anurans were caught more frequently during the rainy season. The diet of adults Proceratophrys sp., Eleutherodactylus sp., Bufo paracnemis Lutz, 1925, and Physalaemus cuvieri Fitzinger, 1826 were studied through the analysis of individual stomach contents. Results showed that the type of diet varied among the species studied.

A tolerância de varias espécies de medusas a valores decrescentes de salinidade e temperatura foi estudada em laboratório. Os resultados mostraram a seguinte ordem de tolerância em relação á água do mar diluída: Cirrholovenia tetranema, Clytia cylindrica e Eucheilota duodecimalis > Proboscidactyla ornata e Obelia spp. > Euphysora gracilis, Ectopleura dumortieri, Liriope tetraphylla e Cunina octonaria. Em relação á diminuição de temperatura, os seguintes resultados foram obtidos: Ectopleura dwrortieri, Euphysora gracilis, Obelia spp. e Proboscidactyla ornata > Liriope tetraphylla > Cunina octonaria > Clytia cylindrica e Eucheilota duodecimalis. Estes resultados obtidos em laboratório foram discutidos levando-se em conta a distribuição dessas espécies na natureza.

The salinity and temperature tolerances of some species of medusae were studied in the laboratory. The results showed the following order of tolerances in diluted seawater: Cirrholovenia tetranema, Clytia cylindrica and Eucheilota duodecimalis > Proboscidactyla ornata and Obelia spp. > Euphysora gracilis, Ectopleura dumortieri, Liriope tetraphylla and Cunina octonaria. In relation to the decrease of temperature, the following results were obtained: Ectopleura dumortieri, Euphysora gracilis, Obelia spp. and Proboscidactyla ornata > Liriope tetraphylla > Cunina octonaria > Clytia cylindrica and Eucheilota duodecimalis. The results obtained in laboratory were discussed in relation to the distribution of the species in nature.