首页> 外文期刊>Journal of Applied Animal Research >The male effect stimulus positively increased the ovarian and reproductive seasonality in Criollo goats irrespective of a controlled photoperiodic regime
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The male effect stimulus positively increased the ovarian and reproductive seasonality in Criollo goats irrespective of a controlled photoperiodic regime

机译:男性的刺激刺激积极地增加了克里奥尔山羊的卵巢和生殖季节性,而不受光周期控制的影响

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Present study evaluated the presence of a sexually active male buck upon the onset of reproductive activity and estrous cycle progression in Criollo goats exposed to a 6-month long controlled photoperiod in a range of 13.4?¢????10.6 light-hours per day. Mexican-native (Criollo) goats ( n =10) were randomly assigned into 2 groups: (1) goats exposed to a male buck ( n =5); (2) goats not exposed to a male buck ( n =5). Blood samples were taken weekly to quantify serum-progesterone levels through radioimmunoanalysis. Male exposure increased luteal activity and estrous cycle progression reflected as a higher number of days in luteal activity (44???±9.05 vs. 32.3???±20.6); a reduced number of days in anestrous (4.0???±4.8 vs. 51.9???±28) and a greater number of luteal phases (15.7???±4.4 vs. 11.3???±8.7) without compromising serum progesterone levels (6.8???±0.8 vs. 7.3???±0.5). In conclusion, presence of a sexually active male induced a greater ovarian activity in Criollo goats, shortening seasonal anestrous irrespective of the controlled photoperiodic regime.
机译:目前的研究评估了在6个月长的受控光周期下,每天在13.4 -10.6光小时范围内暴露的Criollo山羊在生殖活动开始和发情周期进展时存在性活跃雄性雄鹿。 。墨西哥本地(Criollo)山羊(n = 10)随机分为2组:(1)暴露于雄性雄鹿的山羊(n = 5); (2)未暴露于雄性雄鹿的山羊(n = 5)。每周采集血样以通过放射免疫分析定量血清孕酮水平。男性暴露使黄体活动增加,发情周期进展反映为黄体活动天数增加(44±9.05 vs. 32.3±20.6);在不影响血清黄体酮的情况下,减少了发情期的天数(4.0±4.8 vs. 51.9±±28)和更多的黄体期(15.7±±4.4 vs. 11.3±±8.7)水平(6.8±±0.8对7.3±0.5)。总之,有性活跃的雄性的存在引起克里奥尔山羊的卵巢活动增加,无论控制光周期如何,都缩短了季节性的发情期。

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