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首页> 外文期刊>Small Ruminant Research >Effect of different male-to-female ratios and testosterone administration upon the male sexual behavior and the out-of-season reproductive response of anestrous goats
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Effect of different male-to-female ratios and testosterone administration upon the male sexual behavior and the out-of-season reproductive response of anestrous goats

机译：不同男女比例和睾丸激素对发情山羊雄性行为和反季节生殖反应的影响

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The possible effect of testosterone administration and the male-to-female ratio regarding the male sexual behavior during the resting season and the out-of-season reproductive performance of anestrous goats exposed to the male effect under subtropical conditions (26 degrees N) was evaluated. In the experiment-1 two treatments were considered (1) Testosterone-treated bucks (TTB; n=4; 25 mg, i.m., testosterone, every 3-days x 3-week), and (2) Non-testosterone treated bucks (NUB; n=4; i.m. saline every 3-days x 3-week). Thereafter, both experimental groups were exposed to adult goats over two days (1 h x 2days) and two sexual behavior tests were performed: appetitive sexual behavior (ASB) and consummatory sexual behavior (CSB). In the experiment-2, multiparous lactating and anoestrous crossbred goats (n = 60) were randomly assigned to one of four treatments with different male-to-female ratios (MFR): (1) High MFR goats [HMFR; n=20, 1:10 ratio], (2) Low MFR [LMFR; n=10,1:5 ratio] each group exposed to two NUB, (3) High MFR goats [HMFR + T; n=20, 1:10 ratio], and (4) Low MFR [LMFR + T; n 10,1:5 ratio] each group exposed to two TTB. While the us displayed higher ASB (p 0.01; 91.9% vs 8.1 %), the NUB did not express neither CSB (p >0.05; 100% vs 0%) nor sexual behavior irrespectively of the male-to-female load. The HMFR+T depicted a higher ASB (p0.01; 65% vs 35%) than the LMFR + T, without differences in CSB between HMFR+T and LMFR+T. Also, TTB induced estrus response (86.6%) and pregnancy rate (83.3%) while NUB did not. Neither estrus response (85 vs 90%) nor pregnancy rate (85 vs 80%) differed between the HMFR+T and LMFR+T groups. Exposing of anestrous goats to testosterone-treated bucks, irrespective of mating load, was able to successfully invoke neurophysiological pathways to activate ovarian function and to promote a uterine milieu prone to the establishment of pregnancy during the anoestrus season. (C) 2015 Elsevier B.V. All rights reserved.
机译：评估了在亚热带条件下（摄氏28度），服用睾丸激素的可能影响以及雄性与雌性比例对休息季节男性性行为的影响，以及受到雄性影响的发情山羊的反季节生殖性能。 。在实验1中，考虑了两种治疗方法：（1）睾丸激素治疗雄鹿（TTB; n = 4; 25 mg，im，睾丸激素，每3天x 3周一次），以及（2）非睾丸激素治疗雄鹿（ NUB; n = 4;每3天x 3周加入生理盐水）。此后，两个实验组都在两天（1小时x 2天）内暴露于成年山羊，并进行了两次性行为测试：食欲性行为（ASB）和消费性行为（CSB）。在实验2中，将多头泌乳和厌食杂交山羊（n = 60）随机分配到四种具有不同雌雄比（MFR）的处理中的一种：（1）高MFR山羊[HMFR; n = 20，比率为1:10]，（2）低MFR [LMFR; n = 10,1：5的比例]每组暴露于两个NUB，（3）高MFR山羊[HMFR + T; n = 20，比率为1:10]，和（4）低MFR [LMFR + T; n = 10,1：5的比例]每组暴露于两个TTB。尽管美国显示出更高的ASB（p <0.01; 91.9％vs 8.1％），但无论男女之间的负荷如何，NUB都没有表达CSB（p> 0.05; 100％vs 0％）或性行为。 HMFR + T比LMFR + T具有更高的ASB（p <0.01; 65％比35％），而HMFR + T和LMFR + T之间的CSB没有差异。另外，TTB引起发情反应（86.6％）和妊娠率（83.3％），而NUB则不。 HMFR + T和LMFR + T组之间的发情反应（85％对90％）和妊娠率（85％对80％）都没有差异。不论交配负荷如何，将无情山羊暴露于经睾丸激素处理过的雄鹿中，都能够成功地激活神经生理学途径来激活卵巢功能，并促进在厌情季节容易怀孕的子宫环境。 （C）2015 Elsevier B.V.保留所有权利。

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