Researchers aim to uncover more clues to the evolutionary purpose of menopause — a rare phenomenon in the animal kingdom
Scientists are trying to untangle why. In doing so, researchers are aiming to uncover more clues to the evolutionary purpose of menopause — a rare phenomenon in the animal kingdom. Earlier research has suggested that postmenopausal orcas are thought to boost the life chances of their offspring and grandchildren — known as the grandmother effect. The head of a killer whale pod shares her knowledge of the best hunting spots and more than half the fish she catches with her family members.
“Tooth rake marks are indicators of physical social interactions in killer whales and are typically obtained through fighting or rough play,” said lead study author Charli Grimes, an animal behavior scientist at the Centre for Research in Animal Behaviour at the UK’s University of Exeter. It was possible older females used their experience to help their sons in encounters with other whales, Grimes said. The team is collecting drone footage of the whales to better understand the behavior.
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