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What is driving the rise of Sintex Plastics Technology Limited (540653) ✌️【Asset Manager】✌️ Free stock market strategies and analysis based on real-time data, empowering you to choose profitable investment options and avoid risks. Our expert predictions will help you stay in tune with the latest market trends. 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 researchhas 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.

What is driving the rise of Sintex Plastics Technology Limited (540653) ✌️【Asset Manager】✌️ Receive expert stock predictions with real-time updates on global market trends, including stock indices, futures prices, and forex fluctuations. Use our insights to improve your investment strategies and boost your returns. Now, according to a new study published Thursday in the journal Current Biology, these orca matriarchs, which can live up to 90 years, also like to spend their later years indulging in some helicopter parenting of their sons. Female orcas help their sons navigate the complexities of orca social life and protect them from fights with other killer whales.

In a group of orcas, known as theSouthern Resident population, that lives off the Pacific Northwest coast of North America, scientists studied “tooth rake marks” — the scarring left when one whale scrapes their teeth across the skin of another.

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Orcas have no natural predators — except humans — and the tooth marks on their skin can only be inflicted by other killer whales, either within social groups or when two pods meet.

“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.

“We think that these females use their enhanced knowledge of other social groups that obviously comes with time (and) experience … to help their sons navigate the interaction — whether that is signaling to them vocally or behaviorally,” she said. “That’s one hypothesis of how they might be protecting them. Another one is that they involve themselves in a conflict if a fight looks risky (for their son).”

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“We can’t say for sure why this changes after menopause, but one possibility is that ceasing breeding frees up time and energy for mothers to protect their sons,” Grimes said.

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“Males have the opportunity to mate with multiple females, and they do this outside of their own social group. When a male’s calf is born … then the cost of that calf lies with the other group,” she said.

Only humans and five species of toothed whales are known to experience menopause, the new study noted. However, anAugust 2021 studysuggested that the grandmother effect may also occur in female giraffes, who live long beyond their reproductive years.

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