Osobennosti vospriyatiya krasnymi sourkami Marmota caudata (Sciuridae, Rodentia) zvoukovykh signalov [Perception de signaux acoustiques par Marmota caudata. Perception of acoustic signals by Marmota caudata (Sciuridae, Rodentia)].

Résumé

Alarm calls of Marmota caudata and M. bobac and ryhthmically organised noises were played to M. caudata in field playback experiments. Each signal was 15 s duration and consisted of particular sounds with two variants of following period: 2.4 and 0.6 s. We observed five behavioural responses to playbacks of adult marmots and this year offspring. Offsrping showed much higher reactivity responding to all signals less differentially, than elder animals. The latter absolutely differed conspecific calls from heterospecific and noises. Fast variant of anyone signal evoked higher degree of marmot alertness.