Johnstone I
Department of Animal Sciences and Production, University of Queensland, St Lucia.
Aust Vet J. 1987 Jul;64(7):197-200. doi: 10.1111/j.1751-0813.1987.tb15180.x.
A survey of Brisbane catteries was carried out to investigate reproductive patterns of pedigree cats. Eighteen breeders supplied data on 751 litters with a total of 3171 kittens covering the Persian, Chinchilla, Siamese, Burmese and Abyssinian breeds. The overall sex ratio at birth was 100 males to 92 females. There was a significant seasonal effect on sex ratio with litters conceived during the wet season (September to February) producing more males than expected and litters conceived during the dry season producing more females than expected. Litter size and breed had no significant effect on the sex ratio. The average litter size varied with the breed with the most prolific being the Burmese (5.0) then the Siamese (4.5), Persian (3.9), Abyssinian (3.5) and Chinchilla (2.8). The average litter size was smaller for the first litter than for the subsequent 3 litters. The maximum average litter size was reached at 6 years with only a moderate decline thereafter. There was a seasonal fluctuation in births with the greatest numbers being born in spring and the least in late autumn. Longhair cats showed a more marked seasonal distribution of births than the shorthairs which reproduced for most of the year, particularly the Burmese breed.
对布里斯班的猫舍进行了一项调查，以研究纯种猫的繁殖模式。18位繁育者提供了有关751窝猫的数据，共计3171只小猫，涵盖波斯猫、金吉拉猫、暹罗猫、缅甸猫和阿比西尼亚猫品种。出生时的总体性别比为100只雄性对92只雌性。性别比存在显著的季节效应，雨季（9月至2月）受孕的猫窝产出的雄性比预期多，旱季受孕的猫窝产出的雌性比预期多。窝仔数和品种对性别比没有显著影响。平均窝仔数因品种而异，繁殖力最强的是缅甸猫（5.0只），其次是暹罗猫（4.5只）、波斯猫（3.9只）、阿比西尼亚猫（3.5只）和金吉拉猫（2.8只）。第一窝的平均窝仔数比随后的3窝要少。平均窝仔数在6岁时达到最大值，此后仅略有下降。出生存在季节性波动，春季出生的数量最多，深秋出生的数量最少。长毛猫的出生季节分布比短毛猫更为明显，短毛猫一年中大部分时间都能繁殖，尤其是缅甸猫品种。
