Although the water economies of a number of species of amphibians have been studied, the majority of these investigations have been interspecific in nature (Smith et al., 1998). Such studies have often sought to elucidate adaptive differences among species inhabiting different habitats (Thorson and Svihla 1943, Littleford et al. 1947, Thorson 1955, Schmid 1965, Farrell and MacMahon 1969, Ralin and Rogers 1972, Gillis 1979). Comparable adaptive differences may also occur between developmental stages of a single species, especially when these stages occur in different environments. However, correlations between developmental stage and ecophysiological parameters have been relatively unstudied.