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Ewes prefer to mate with submissive rams when given a choice


John Guidi/robertharding/Alamy
When female sheep get the choice, they would rather mate with a subordinate male than a dominant one.
Dominant rams usually mate with ewes much more often than lower-ranking rams do. But they can literally run out of sperm from mating so much in a short period of time.
And if they fathered all the lambs in a flock of sheep (
Ovis aries), the group would have less genetic diversity, which can lead to malformations and inheritable diseases. So ewes, which generally mate with several males when they are …
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