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首页> 外文期刊>Tropical Animal Health and Production >Human–animal interaction, stress, and embryo production in Bos indicus embryo donors under tropical conditions
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Human–animal interaction, stress, and embryo production in Bos indicus embryo donors under tropical conditions

机译：热带条件下印度dic Bos indicus胚胎供体的人与动物相互作用，压力和胚胎产生

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摘要

This study investigated the effect of human–animal interaction (HAI) and the stress response on the quality of embryo production in superovulated Nelore (Bos indicus) cattle, under tropical conditions. Thirty-two females underwent a superovulation protocol for 5 days. Cortisol concentrations were determined in blood plasma collected on days 0, 4, and 5. Artificial insemination was performed on days 4 and 5, and nonsurgical embryo flushing on day 11. Embryo production and viability were determined. Human stimulation, animal behaviors, accidents, and handling time were recorded to assess HAI. Cattle age was negatively correlated with accidents, frequency of aversive behaviors, and negative stimuli by stockperson during transit through corral compartments to receive superovulation treatments. The factor analysis revealed two distinct groups. The first group was called stressed and had higher cortisol concentration than the nonstressed group, 16.0 ± 2.1 and 12.5 ± 1.0 ng/mL, respectively. Comparisons between these groups showed that the frequency of voice emissions by the stockperson and the number of accidents were higher in the stressed group, and also, the mean handling time was longer in the stressed group than for the nonstressed. As a result, viability rate of the embryos was 19% lower in the stressed group (P < 0.05). This indicates that intensive negative HAI is likely related to stress, which affects embryo production in a superovulation program.
机译：这项研究调查了人与动物的相互作用（HAI）和应激反应对热带条件下超排卵的Nelore（Bos indicus）牛胚胎生产质量的影响。 32名女性进行了5天的超排卵方案。在第0、4和5天收集的血浆中测定皮质醇浓度。在第4和5天进行人工授精，在第11天进行非手术胚胎冲洗。确定胚胎的产生和生存力。记录人类的刺激，动物行为，事故和处理时间以评估HAI。牛龄与事故，厌恶行为的频率以及饲养员在通过隔室接受超排卵治疗期间的负面刺激负相关。因子分析显示了两个不同的组。第一组称为压力组，其皮质醇浓度高于无压力组，分别为16.0±2.1和12.5±1.0 ng / mL。这些组之间的比较表明，压力大的组股票经理发出声音的频率和事故的数量更高，而且压力大的组的平均处理时间要比非压力大。结果，应激组的胚胎存活率降低了19％（P <0.05）。这表明，强烈的负HAI可能与压力有关，这会影响超排卵程序中的胚胎产生。

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