中国林蛙繁殖产量与雌体大小及年龄的关系

采用相关分析和回归分析研究了中国林蛙(Rana chensinensis)同一种群内母体大小、年龄与繁殖产量的关系．结果表明：(1)母体大小对个体的繁殖产量有显著影响．随着体长的增长，窝卵数、卵径和窝卵质量随之增加；年龄对窝卵数、卵径影响不显著，但与窝卵质量呈正相关．(2)在特定的体长范围内，窝卵数与卵大小间存在一种权衡；母体产的窝卵数越多，卵母细胞相对就越小，反之亦然．

Reproductive Output of Rana chensinensis Relate to Female Body Size and Age

This paper used correlation and regression to study the relationships between body size (snout-urostyle length), age and reproductive output within a population. The conclusions indicated: (1) female body size was a remarkable factor that affected individual reproductive output. Clutch size, egg size or clutch mass increased with increasing female body size. Female age was no significantly related to clutch size or egg size, but clutch mass was found to be positive correlate with age. (2) Within a given range of body length, there was a trade-off between clutch size and egg size. Any increase in the production of egg numbers was accompanied by a corresponding decline in egg size, and vice versa.