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首页> 外文期刊>Journal of dairy research >Oxytocin and cortisol release during suckling, hand-milking and machine milking in camels
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Oxytocin and cortisol release during suckling, hand-milking and machine milking in camels

机译：在哺乳期间鼻孔和皮质醇释放，手挤奶和骆驼挤奶

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This research paper addresses the hypothesis that oxytocin (OT) could be released during suckling and during milking with and without the presence of a calf and that this release could be regulated by maternal behaviour. Plasma concentration patterns of OT and cortisol (CORT) were measured in six Tunisian dromedary camels during 2 suckling episodes, 2 manual milking episodes with calves beside the mother and 2 machine milking episodes without calves present. Various patterns of OT release were observed between each camel including specific two peak release patterns. Higher plasma OT concentrations were found during the suckling and hand-milking episodes with simultaneous suckling of calves, than during the machine milking episodes without calves. Exclusive mechanical milking episodes also evoked significant mean OT release, although greatly reduced compared to suckling and hand milking. The low basal levels and classical CORT release patterns suggested non-stressful management practices were used and there were very limited differences in udder stimulation between managements. The OT release induced by exclusive suckling and suckling together with hand-milking gives a reference point for what a good milk ejection stimulation is in camels. The important and specific reduction of OT release during machine milking without the calf present could be a physiological consequence of the maternal behaviour (selectivity for the own young) and to a lesser extent explained by a lower stimulation by machine milking.
机译：本研究论文解决了催产素（OT）在乳幼儿（OT）和挤奶期间释放的假设，并且在没有小牛的情况下并且该释放可以通过母体行为来调节。在2次乳剧集中，在六个突尼斯的巨大骆驼中测量了OT和皮质醇的血浆浓度模式，2个手动挤奶发作，母亲旁边的牛犊和2个机器挤奶发作，没有小牛。在每个骆驼之间观察到包括特定的两个峰释放模式的各种释放模式。在哺乳期和手挤奶发作期间发现较高的血浆OT浓度，同时吮吸小牛，而不是在没有小牛的机器挤奶发作期间。独家机械挤奶剧集也诱发了显着的平均释放，虽然与哺乳和手挤奶相比大大减少。低基础水平和经典皮质释放模式建议使用非压力管理实践，管理层之间的乳液刺激差异非常有限。独家哺乳和手中吮吸引起的OT释放给出了一个良好的牛奶喷射刺激在骆驼的参考点。在没有小牛的机器挤奶期间的重要和特异性减少，没有小腿存在于母乳期间可能是母体行为的生理结果（本身的选择性），并且通过机挤奶的较低刺激来解释的较小程度。

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