Facial expression, vocalization and abnormal postures of cattle submitted to conventional eletroejaculation
DOI:
https://doi.org/10.22256/PUBVET.V11N11.1085-1097Keywords:
animal welfare; semen collection; behavior; andrological test; bullAbstract
Electroejaculation is routinely used for bovine semen collections. Studies of behavioral changes in cattle submitted to conventional electroejaculation are rare, and facial expression in this procedure is not elucidated. The objective of this study was to evaluate the facial expression, vocalization and anomalous postures in 62 bulls submitted to electro - ejaculation, in andrological examinations. A conventional electro-jogger was used by successively applying electrical stimuli with increasing currents of direct current up to five stimuli to obtain ejaculation. The collections were conducted during the electroejaculation by the filming of the animals contained, focusing the head and neck where the facial expression, vocalization, head postures, lying attitude, salivation and ejaculation were evaluated. Facial expression was assessed by behavioral changes in the mouth and eyes. In the results of the analysis of the logistic regression method, there was a significant 5% probability effect when considering the intensity of the electrical stimuli in the electroejaculation procedure in the registers of head postures, eyes, vocalization, lying down and ejaculation. However, there was no significant effect when considering the intensity of electrical stimuli in the electroejaculation procedure in the records of behavioral changes of the mouth and in the occurrence of sialorrhea. The head postures were 71.0% in the first electrical stimulus; 82.26% in the second stimulus; 85.5% in the third; 89.66% in the fourth and 82.6% in the fifth electric stimulus. The behavioral alterations of the eyes presented 74.2% in the first electric stimulus; 87.1% in the second and third stimuli; 98.3% in the fourth and 97.8% in the fifth electric stimulus. No animal lay down during the first electric stimulus. The attitude of lying in the second, third, fourth and fifth electric stimuli were 6.5%; 4.8%; 5.2% and 13.0%, respectively. Vocalizations were higher in the fourth electrical stimulus, with 12.1% and in the fifth, with 10.9%. It was concluded that electro-ejaculation induced changes in facial expression, vocalization and lying down during the examination. These results suggest the need for refinement of the electroejaculation, improvement of the semen collection protocol, equipment used, facilities and animal handling before, during and after this procedure to improve animal welfare.
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