Mule cognition: a case of hybrid vigour?
@article{Proops2008MuleCA, title={Mule cognition: a case of hybrid vigour?}, author={Leanne Proops and Faith Adelaide Burden and B. Osthaus}, journal={Animal Cognition}, year={2008}, volume={12}, pages={75-84} }
This study compares the behaviour of the mule (Equus asinus × Equus caballus) with that of its parent species to assess the effects of hybridization on cognition. Six mules, six ponies (E. caballus) and six donkeys (E. asinus) were given a two choice visual discrimination learning task. Each session consisted of 12 trials and pass level was reached when subjects chose the correct stimulus for at least 9 out of the 12 trials in three consecutive sessions. A record was made of how many pairs each…
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