[Comparative bioacoustical study of diurnal and nocturanl rodents from closed ranges].
Studies have been made on the evoked potentials at the level of the colliculus inferior in the nocturnal rodent Glis glis and diuranl one--Eutamias sibiricus. In G. glis, the evoked potentials were recorded in a wide range of sonic and ultrasonic frequencies up to 90 kc, while in E. sibiricus these potentials were recorded in a range of frequencies up to 60 kc. The auditory threshold curves for G. glis exhibited two areas of minimum thresholds-- a low frequency area and an area at a boundary between sonic and ultrasonic frequencies. Threshold curves for E. sibiricus have no clear sensitivity maximum. In G. glis, correlation between the spectrum of their communication signals and acoustic noise in the habitat was observed. The species investigated differ in the rate of the recovery of the evoked potentials to paired stimuli and in the values of critical summation time.
D000161:Acoustic Stimulation; D000818:Animals; D001307:Auditory Perception / Q000502:physiology*; D001309:Auditory Threshold / Q000502:physiology; D002940:Circadian Rhythm; D003623:Dark Adaptation; D004463:Ecology; D005071:Evoked Potentials; D006309:Hearing / Q000502:physiology*; D008027:Light; D012377:Rodentia / Q000502:physiology*; D003336:Tectum Mesencephali / Q000502:physiology; D014465:Ultrasonics
Sravnitel'noe bioakusticheskoe issledovanie dnevnykh i nochnykh gryzunov zakrytykh prostranstv.