Publicação: Alterações de fluidos corpóreos na rã Leptodactylus fuscus durante a estivação (Anura, Leptodactylidae).
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The frog, L. fuscus, becomes dormant during the dry season in southeastern Brazil. Plasma and urine were obtained and analyzed for K+, Na+, and osmotic concentrations in active and estivating frogs. Soil water potential from the estivation sites was compared with the osmotic concentrations of the frog. Plasma and urine osmotic concentrations (286.2 +/- 13.8 and 242.3 +/- 17.2 mOsm1(-1), respectively) were higher in the estivating than in active frogs (240.3 +/- 12.8 and 112.7 +/- 15.6 mOsm1(-1); plasma and urine), and the same holds true for plasma K+ content. The Na+ concentration was the same for active and estivating frogs. Soil water potential corresponded to osmotic pressure of 110 mOsm1(-1), showing that L. fuscus may uptake water from the soil during the estivation.
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adaptation, animal, body fluid, female, frogs and toads, male, osmolarity, physiology, Animal, Anura, Body Fluids, English Abstract, Estivation, Female, Male, Osmolar Concentration, Support, Non-U.S. Gov't
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Português
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Revista brasileira de biologia, v. 50, n. 1, p. 243-247, 1990.
