Tuesday, February 5, 2013

Prolonged Menopause in Killer Whales

In addition to humans, orcas are one of the only other species known to have a prolonged period during which they cannot reproduce.  A recent study in the journal Science reveals that the purpose of menopause in killer whales may be to ensure that females are able to care for their sons and guarantee that their genes are passed down to the next generation.  By investing more in their offspring, the females are able to improve their reproductive success.

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