Jöchle W, Jöchle M
Wolfgang Jöchle Assoc. Inc., Denville, NJ 07834.
J Reprod Fertil Suppl. 1993;47:419-24.
A feral cat population (12 females, 13 males) was observed almost daily for 6 years, at a location 40.53 degrees N and 74.29 degrees W. Cats were accustomed to twice-daily feeding. Oestrous behaviour was seasonal and started in early January, irrespective of climatic conditions, with peak levels of oestrous activities in late January and February. Of all 60 heat periods observed, and conceptions recorded, the percentage occurrence was 58 and 49 in the first quarter, and 29 and 33, 12 and 16 and 1 and 2 in the second, third and fourth quarter, respectively. Queens could be reliably identified as being pregnant by 31.5 +/- 5.82 days, and were subjected between days 36 and 57 of gestation to daily oral treatment with 5-15 micrograms cabergoline kg-1 placed on food. Treatments (n = 41) from days 36 +/- 6.17 to 40.8 +/- 6.96 resulted in abortion in all animals on day 40.5 +/- 6.19; if treatment started as late as day 48.5, and lasted 9 or more days, premature parturition occurred. As cabergoline had caused mammary gland regression within 36-48 h, litters could not be nursed and perished quickly. Five repeatedly aborted queens were subsequently allowed to go to term. Pregnancies, gestation length (64.5 days), parturitions, maternal care and lactations were normal. Of the 24 kittens born out of seven pregnancies, 16 were observed from 6 months to 3 years. Pubertal oestrus and first conceptions occurred at 189.9 days (range 150-214 days) and 212.0 days (155-277 days), respectively. Males were seen to achieve reproductive success in their third year only.
在北纬40.53度、西经74.29度的一个地点，对一群野生猫（12只雌性，13只雄性）进行了为期6年的几乎每日观察。这些猫习惯每日喂食两次。发情行为具有季节性，于1月初开始，不受气候条件影响，1月下旬和2月发情活动达到高峰。在观察到的所有60个发情期及记录的受孕情况中，第一季度的发生率分别为58%和49%，第二、第三和第四季度分别为29%和33%、12%和16%、1%和2%。母猫在怀孕31.5±5.82天时可被可靠识别，并在妊娠第36至57天期间，每日在食物中添加5 - 15微克/千克卡麦角林进行口服治疗。在第36±6.17天至40.8±6.96天进行治疗（n = 41），所有动物在第40.5±6.19天流产；如果治疗开始得晚至第48.5天且持续9天或更长时间，则会发生早产。由于卡麦角林在36 - 48小时内导致乳腺退化，幼崽无法得到哺乳并很快死亡。五只多次流产的母猫随后足月分娩。怀孕、妊娠期长度（64.5天）、分娩、母性照料和哺乳均正常。在七次怀孕所生的24只小猫中，有16只从6个月观察到3岁。青春期发情和首次受孕分别发生在189.9天（范围150 - 214天）和212.0天（155 - 277天）。雄性仅在第三年获得繁殖成功。
