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Figure 5 | BMC Biology

Figure 5

From: Quality prevails over identity in the sexually selected vocalisations of an ageing mammal

Figure 5

Relationship between male rank and the minimum frequency of the sixth formant of groans. Lower values of dominance rank indicate higher-ranking males. Males tend to produce groans with a lower minimum frequency of the sixth formant when higher-ranking (linear relationship, marginally significant, P = 0.05). Dots represent mean values per year for each male and lines show repeated measures of the same individual across years.

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