中文摘要：

通过分析和讨论最大生产力窝卵数、最适窝卵数、常见窝卵数和平均窝卵数四个概念之间的区别和联系，认为在检验Lack假说时，应该检验常见窝卵数是否等于最适窝卵数．

英文摘要：

Through analyzing and discussing the difference and relation among the most productive clutch-size, the optimal clutch-size, the commonest clutch-size and the mean clutch-size,whether the bommonest clutch-size is equal to the optimal clutch-size should be tested when the Lack hypothesis is tested.