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首页> 外文期刊>Journal of Animal Physiology and Animal Nutrition >Interrelationship between milk constituents, serum oestradiol and vaginal mucus indicators of oestrus in Egyptian buffaloes.
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Interrelationship between milk constituents, serum oestradiol and vaginal mucus indicators of oestrus in Egyptian buffaloes.

机译：埃及水牛的乳成分，血清雌二醇和发情的阴道粘液指标之间的相互关系。

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摘要

The intensity of heat signs in buffaloes is generally low and the incidence of suboestrus varied from 15 to 73% (Buffalopedia). The objective of this study was to investigate the feasibility of monitoring the changes in some milk constituents, oestradiol levels and electrical conductivity of vaginal mucus during peri-oestrous period in prediction of the timing of oestrus in buffaloes. Twenty-one Egyptian buffaloes aged 3-9 year, 1st-6th lactations, were examined by oestrous detector and ultrasonographically for monitoring the ovarian and uterine activity for 7 days around the time of standing oestrus. Sodium, potassium, chloride and lactose were assayed in aqueous phase of milk; besides, oestradiol was estimated in serum. Current results declared highly significant acute changes in milk constituents at the time of oestrus characterized by peaking of chloride and sodium levels and lowering of potassium and lactose values. The alternation in milk composition when arranged in decreasing order of magnitude, sodium was the highest (77.78+or-0.69%), followed by chloride (61.60+or-1.52%) and potassium (-58.14+or-10.89%). Concomitantly, milk lactose decreased by 26.07+or-7.97% compared to baseline levels. Synchronously, vaginal electrical resistance (VER) showed a significant (p <0.01) decrease, but serum oestradiol 17 beta levels surged (59.93+or-7.29 pg/ml) on day of oestrus. Serum oestradiol level was negatively correlated with VER (r=-0.577), potassium (r=-0.661), positively correlated with chloride (r=0.707) and sodium (r=0.579) and not correlated with lactose levels. These results for the first time suggested that the changes in constituents of milk during peri-oestrous period may be used as a practical non-invasive indicator for oestrous detection and prediction of ovulation in Egyptian buffaloes.
机译：水牛的热迹象强度一般较低，发情期的发生率在15％至73％之间（水牛）。这项研究的目的是调查在雌性水牛发情期间监测一些乳成分，雌二醇水平和阴道粘液电导率变化的可行性，以预测水牛发情的时间。用雌性检测器和超声检查21只3-9岁，1至6日泌乳的埃及水牛，在发情期约7天监测卵巢和子宫的活动。在牛奶的水相中测定钠，钾，氯化物和乳糖;此外，血清中估计雌二醇。目前的结果表明，发情期牛奶成分的急性变化非常显着，其特征是氯化物和钠含量达到峰值，钾和乳糖含量降低。牛奶组成的变化按降序排列时，钠最高（77.78+或-0.69％），其次是氯化物（61.60+或-1.52％）和钾（-58.14+或-10.89％）。同时，与基线水平相比，牛奶乳糖降低了26.07+或-7.97％。同时，阴道电阻（VER）显着下降（p <0.01），但发情当日血清雌二醇17β水平上升（59.93+或-7.29 pg / ml）。血清雌二醇水平与VER（r = -0.577），钾（r = -0.661）呈负相关，与氯离子（r = 0.707）和钠（r = 0.579）呈正相关，与乳糖水平不相关。这些结果首次表明，在雌性水牛期，牛奶成分的变化可作为一种实用的非侵入性指标，用于对埃及水牛的雌性水肿进行雌性检测和预测排卵。

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