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Fig. 3 | BMC Zoology

Fig. 3

From: Ontogeny of audible squeaks in yellow steppe lemming Eolagurus luteus: trend towards shorter and low-frequency calls is reminiscent of those in ultrasonic vocalization

Fig. 3

Ontogenetic 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)

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