Clark M M, Galef B G
Department of Psychology, McMaster University, Hamilton, Ontario, Canada.
Dev Psychobiol. 1989 Mar;22(2):173-82. doi: 10.1002/dev.420220207.
In previous experiments, we have shown that age at vaginal introitus predicts adult patterns of reproductive, maternal, and aggressive behavior of female Mongolian gerbils. In the present series of studies, we explored the relationship in gerbils between age at vaginal patency and three other indices of rate of female sexual development: ovarian weight, occurrence of vaginal estrus, and onset of attractiveness to males. We found that female gerbils, classified on the basis of their ages at vaginal introitus as early-maturing: (a) exhibited greater ovarian weights throughout development than did their late-maturing, female sibs; (b) exhibited estrus and Diestrus I stage vaginal smears and, by inference, ovulation at an earlier age than did late-maturing females; and (c) elicited mounting by males at an earlier mean age than did late-maturing females. The data were consistent with the hypothesis that age at vaginal introitus is a reliable indicator of rate of sexual development in female Mongolian gerbils.
在先前的实验中，我们已经表明，阴道开口时的年龄可预测雌性蒙古沙鼠成年后的生殖、母性行为和攻击行为模式。在本系列研究中，我们探讨了沙鼠阴道通畅时的年龄与雌性性发育速度的其他三个指标之间的关系：卵巢重量、阴道发情的出现以及对雄性的吸引力开始时间。我们发现，根据阴道开口时的年龄分类为早熟的雌性沙鼠：(a) 在整个发育过程中比其晚熟的雌性同胞表现出更大的卵巢重量；(b) 比晚熟雌性更早出现发情期和动情间期I期阴道涂片，据此推断更早排卵；(c) 比晚熟雌性在更早的平均年龄引发雄性的爬跨行为。这些数据与以下假设一致，即阴道开口时的年龄是雌性蒙古沙鼠性发育速度的可靠指标。
