Cooccurrence of Yawning and Stereotypic Behaviour in Horses (Equus caballus)

Figure 2

Frequencies of stereotypic behaviours (per minute) in relation to yawning frequency for ENE horses. (a) pooled oral and motor stereotypic behaviours, (b) oral stereotypies, and (c) motor stereotypies for the 50–60 minutes focal observations. Oral stereotypic behaviours: tongue play, repetitive wall, feeder, and object licking/biting, and cribbing; motor stereotypic behaviours: head shaking/nodding and weaving. The more frequently the horses yawned, the more frequently the stereotypic behaviours were displayed. Spearman correlation tests, 𝑁=59, **𝑃<.01, ***𝑃<.001.

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(b)

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