Shimatsu Y, Yuzawa H, Aruga K, Nakura M
Laboratory Animal Research Station, Nippon Institute for Biological Science, 3331-114 Kamisasao, Kobuchisawa, Hokuto, Yamanashi, Japan.
Reprod Domest Anim. 2007 Dec;42(6):664-5. doi: 10.1111/j.1439-0531.2006.00840.x.
The purpose of this study was to examine the effect of time for mating and gestation length on reproductive efficiency in dogs. Groups of eight, six and six beagle bitches were mated with a total of three sires on days 3, 5 and 7, respectively, after the luteinizing hormone (LH) surge. All the bitches whelped successfully. The gestation lengths (the intervals from the LH surge to the whelping) were 65.1 +/- 1.9, 65.5 +/- 1.9 and 68.0 +/- 1.8 days, respectively. This length of mating 7 days after the LH surge was significantly longer than that of mating 3 and 5 days after the LH surge (p < 0.05). The litter sizes were 5.5 +/- 2.2, 6.2 +/- 1.9 and 4.8 +/- 2.1, respectively and there was no significant difference between any of the groups. In conclusion, mating 3-7 days after a bitch's LH surge results in a good reproductive efficiency and the intervals from the LH surge to the whelping of mating 7 days after the LH surge shows a longer day significantly in comparison with mating 3 and 5 days after the LH surge.
本研究的目的是检验配种时间和妊娠期长度对犬繁殖效率的影响。将八只、六只和六只比格犬母犬分为三组，分别在促黄体生成素（LH）高峰后的第3天、第5天和第7天与总共三只公犬进行配种。所有母犬均成功分娩。妊娠期长度（从LH高峰到分娩的间隔）分别为65.1±1.9天、65.5±1.9天和68.0±1.8天。LH高峰后第7天的配种时间明显长于LH高峰后第3天和第5天（p<0.05）。窝产仔数分别为5.5±2.2只、6.2±1.9只和4.8±2.1只，各组之间无显著差异。总之，母犬LH高峰后3至7天配种可获得良好的繁殖效率，与LH高峰后第3天和第5天配种相比，LH高峰后第7天配种从LH高峰到分娩的间隔天数明显更长。
