Suzuki M, Ohtaishi N
Department of Oral Anatomy I, School of Dentistry, Hokkaido University, Sapporo, Japan.
J Vet Med Sci. 1993 Oct;55(5):833-6. doi: 10.1292/jvms.55.833.
The authors studied some reproductive characteristics of wild female sika deer (Cervus nippon yesoensis Heude, 1884) in Ashoro District, Hokkaido. Large numbers of females attained sexual maturation at the age of yearling, and the pregnancy rate of yearlings and older was 96.4% (n = 28). These high levels of fertility should be considered the standard for high quality populations of sika deer. The estrus cycle began in late October. Twinning was exceptional. Sex ratio of fetuses was statistically 1:1, and there was no significant difference in fetal weights between males and females in March. The birth weight is estimated to be around 6 kg. Accessory corpora lutea were found in 77.8% (n = 27) of pregnant females.
作者研究了北海道芦别地区野生雌性梅花鹿（Cervus nippon yesoensis Heude，1884）的一些繁殖特征。大量雌性在一岁时达到性成熟，一岁及以上雌性的怀孕率为96.4%（n = 28）。这些高生育水平应被视为梅花鹿高质量种群的标准。发情周期始于10月下旬。双胎情况较为罕见。胎儿的性别比在统计学上为1:1，3月份时雄性和雌性胎儿的体重没有显著差异。出生体重估计约为6千克。在77.8%（n = 27）的怀孕雌性中发现了副黄体。
