Fig. 3From: Ontogeny of audible squeaks in yellow steppe lemming Eolagurus luteus: trend towards shorter and low-frequency calls is reminiscent of those in ultrasonic vocalizationOntogenetic trajectories for the acoustic parameters of sharp squeaks produced by 120 individual yellow steppe lemmings belonging to 12 age classes ranging from neonates to adults. N = 10 for each age class, the averaged values for each subject were taken. Designations: duration – call duration; f0beg – the fundamental frequency at the onset of a call; f0max – the maximum fundamental frequency; f0end – the fundamental frequency at the end of a call; f0min – the minimum fundamental frequency; df0 – the depth of frequency modulation; fpeak – the frequency of maximum amplitude; central points – means, whiskers – SD. The same superscripts indicate the age classes, which are non-significantly different from other age classes by the given acoustic parameter (p < 0.05, Tukey post hoc)Back to article page