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Fig. 2 | BMC Evolutionary Biology

Fig. 2

From: Age related decline in female lar gibbon great call performance suggests that call features correlate with physical condition

Fig. 2

Comparisons of great call parameters between young adults (white bars) and old adults (gray bars). The overall call quality index (f) summarizes rankings derived from four parameters: delta F0 (a), maximum F0 (b), duty cycle (c) and number of high notes (d). Error bars represent ± 1 SEM. *P < 0.05, ***P < 0.001, NS: not significant

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