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首页> 外文期刊>Small Ruminant Research >The timing of the commencement of the breeding season in Boer and rangeland goats raised in the tropics of Queensland, Australia
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The timing of the commencement of the breeding season in Boer and rangeland goats raised in the tropics of Queensland, Australia

机译：在澳大利亚昆士兰州热带地区饲养的波尔山羊和牧场山羊开始繁殖季节的时间

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摘要

This study aimed to determine the timing of the onset of the breeding season in Boer and rangeland goats raised in a tropical region of northern Queensland. The experiment was carried out using 25 Boer and 20 rangeland female goats. Boer and rangeland goats were kept on the same pasture in the absence of males and supplemented to provide nutritional requirements above maintenance. Blood samples were collected once weekly from December 2011 to May 2012 and analyzed for concentrations of progesterone. The mean time to first ovulation was found to occur earlier in Boer compared to rangeland goats (64.7 +/- 5.0 days vs. 87.7 +/- 5.6 days, respectively; P0.05). Differences in survival curves (P0.05) for the timing of onset of first ovulation between breeds were also detected. Boer goats started ovulating in December (83%) and had all ovulated by March while most rangeland goats started ovulating in March (84%) and had all ovulated by the end of April. These results demonstrate that in a tropical region of north Queensland Boer goats commence ovulatory cycles earlier than rangeland goats which may be beneficial if an earlier start to the breeding season is preferred. (C) 2015 Elsevier B.V. All rights reserved.
机译：本研究旨在确定在昆士兰州北部热带地区饲养的波尔山羊和牧场山羊开始繁殖季节的时间。实验是使用25头布尔山羊和20头牧场山羊进行的。布尔山羊和牧场山羊在没有雄性的情况下饲养在同一个牧场上，并补充营养以维持营养。从2011年12月至2012年5月，每周采集一次血液样本，并分析其孕酮浓度。与草原山羊相比，发现波尔的首次排卵平均时间更早（分别为64.7 +/- 5.0天和87.7 +/- 5.6天; P <0.05）。还发现了不同品种之间第一次排卵发生的生存曲线差异（P <0.05）。波尔山羊从12月开始排卵（83％），到3月全部排卵，而大多数牧场山羊从3月开始排卵（84％），到4月底全部排卵。这些结果表明，在昆士兰州北部的热带地区，波尔山羊的排卵周期要比牧场山羊的早，如果最好选择较早的繁殖季节，这可能是有益的。 （C）2015 Elsevier B.V.保留所有权利。

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