Lack, however, suggested that clutch size—the number of eggs a bird lays per breeding cycle—is far below the potential limit of egg production.

然而，缺乏情况表明卵的大小——每一个繁殖周期下的蛋的数量——远低于产蛋的潜在限制。

youdao

Life cycle, generation time, fecundity, and egg production quantity are the main factors to determine these two species' vertical migration.

生命周期、世代时间、繁殖力和产卵量是决定这两种桡足类垂直移动的主要因素。

youdao