Lokal'naïa spetsifika situativnykh izmenenii spektral'noï strouktoury predouprejdaïoutsego ob opasnosti signala stepnogo sourka [Spécificités locales des changements situatifs de la structure spectrale du cri d'alarme chez la bobak. Local specificity of situation variability of alarm call structure of steppe marmot].

Résumé

Situation variability of alarm call spectral structure of steppe marmot from 3 local populations have been considered. Animals from population 1 inhabit steppe near Schilovka village (Ulijanovsk region), 2-near Surulovka village (Ulianovsk region), 3-near Naumovka village (Tselinograd region). Local specificity has been discovered in general situational variability of the spectral structure of alarm call. Terminal notes of the situation variances of alarm call (notes when animal is into a burrow) maintain only fundamental frequency in low frequency component in the population 1 and 2 then 3. Moreover, this simplification of spectral structure is discontinued in the populations 1 and 2. Rapid sequences of animal going into a burrow in the population 3 differ from the same in populations 1 and 2 by prevalence of low- frequency component the 3d population only first 2-3 units of rapid sequence have the high-frequency components with number of units exceeding 3-4.