Science. 1977 Jul 22;197(4301):403-5. doi: 10.1126/science.197.4301.403.
The contribution of eggs to the communal clutch by females of the group and the genetic contribution by males of the group are significantly skewed. The amount of parental care performed by each bird is correlated with relative egg ownership for both sexes.
群体中的雌性对公共卵的贡献和群体中的雄性的遗传贡献存在明显的偏斜。每只鸟所进行的亲代照顾的数量与两性的相对卵所有权相关。