[The structural traits of the signals of aggressive-defensive behaviors in the domestic cat (Felis catus L.)].

The results of the ethological-bioacoustic study carried out in 18 male domestic cats are presented in this work. Facial gesture, postural, and acoustic activity was recorded. The dynamics of frequency characteristics of sound calls was studied by means of parametric analysis, the functional significance of the recorded vocalizations was determined in the process of development of conflict situations. The results obtained indicate the relationship between the emotional state and the dynamics of the spectral characteristics of the sound calls. It was shown that the absolute value of the first dominant frequency and signal duration reflect the excitation level of mates. A conclusion was drawn that the redistribution of power from the first to the second spectral peak is an informative sign reflecting the motivation change in the dominant male (from threat to attack).