Abstract: | Sound emission in animal world is a means to perceive the surrounding environment, the space orientation, and the transmission of biological information.
The analysis of the sound emissions at the anuras has a very important role (beside the morphological criteria) to the taxonomic identification. That is the reason for the characteristics of the amphibians’song are intensely studied lately. The investigations of the sound emissions were done at Bufonidae (9) and Hylidae (5, 6). Thus, the green frogs were carefully observed, because it is considered that their sound emissions allow a more precise identification of the species, especially of those from Rana esculenta complex (1 – 4, 7, 8, 10 – 14).
Many scientific papers published recently refer to bioacoustic analysis (besides the traditional methods that investigate intra- and interspecific variability). This facts led us to initiate our study of sound emissions of Rana ridibunda Pall., free or in captivity, and to the determine their individual variability. |
