这可以使这一对正常交配同时也阻止雌禽待在窝里。
This allows the pair to mate properly and stops the hen from staying in the nest.
本试验发现雄禽比雌禽易感，发病率高。
The morbidity and mortality rates of male poultry were higher than that of female one.
但是据迪安博士说，精明的雌禽也有对付这种战术的方法。
But according to Dr Dean, the shrewd females have worked out a way of dealing with this tactic as well.
除了更大的空间，对雌禽来说，最重要的似乎是她们的巢穴。
Apart from more space, the hens' highest priority seems to be a nest.
但是雌禽通过排出它认为社会地位低下雄禽的遗传物质，设法保留了对父亲身份的控制。
But by removing the genetic material of males they consider socially inferior, the hens have managed to retain control of paternity.
但是雌禽通过排出它认为社会地位低下雄禽的遗传物质，设法保留了对父亲身份的控制。
But by removing the genetic material of males they consider socially inferior, the hens have managed to retain control of paternity.
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