Knee-clicks and visual traits indicate fighting ability in eland antelopes: multiple messages and back-up signals.

The morphometric measurements were based on an average of 4.6 ± 0.3 (mean ± SE) lateral photographs of each bull at each assessment, taken at varying distances, and repeatability, which was calculated following [ 33 ], was highly significant ( F 61,172 = 20.6, P < 0.001, repeatability 0.84, using body depth as an indicator).

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