Efecto de la castración, quirúrgica vs no quirúrgica, en los niveles de estrés de la cabra chusca del bosque seco de la provincia de Loja
In this study the effect of surgical and non-surgical castration on stress levels and productive performance of Creole kids was evaluated. Twelve Chusca kids with an average weight of 16.00 kg distributed in three groups were used, according to randomized block design. Three treatments were evaluate...
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| 格式: | bachelorThesis |
| 语言: | spa |
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2020
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| 主题: | |
| 在线阅读: | http://dspace.unl.edu.ec/jspui/handle/123456789/23210 |
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添加标签 | 总结: | In this study the effect of surgical and non-surgical castration on stress levels and productive performance of Creole kids was evaluated. Twelve Chusca kids with an average weight of 16.00 kg distributed in three groups were used, according to randomized block design. Three treatments were evaluated: T (control), Q (surgical), NQ (non-surgical) for 70 days. The animals were weighed on the first day and then on day 70, blood cortisol levels were measured, before castration, 3 h post castration, 11 d later; the behavior of the animals was observed during castration and 180 minutes after castration. The variables were analyzed using the statistical program Infostat. The results showed that surgically neutered animals obtained higher levels of cortisol at 3 h. The average daily weight gain (GMD) showed no significant difference; with an average 180 g / d, 290 / d and 140 g / d respectively. The cost of kg of meat was higher in surgically neutered animals with $ 1.13 and lower in the other experimental groups. Surgical castration caused greater stress and pain, after castration both treatments generated behavioral changes in response to stress. It is concluded that the fattening time was not enough to express its maximum productive potential since, the weight, growth and development increases with age. KEYWORDS Castration, surgical, rubber ring, cortisol, stress. |
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