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Rising dividends screen ✌️【Short-Term Contract】✌️ Get precise stock market predictions and free access to real-time market data for efficient decision-making and portfolio growth. Editor’s note:Sign up for 【 - Free VIP Investment Strategies 】’sWonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more.

Rising dividends screen ✌️【Short-Term Contract】✌️ Precise stock market trend analysis with expert insights into global markets, including stock indices, metals, and energy sectors. Leverage our data-driven predictions to maximize your returns. 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.

Rising dividends screen ✌️【Short-Term Contract】✌️ Free expert predictions on stock trends and real-time data to help you make informed decisions and grow your wealth steadily. 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.

Rising dividends screen ✌️【Short-Term Contract】✌️ Accurate real-time market data and expert stock predictions for profitable investment opportunities in global markets. The research team found males had 35% fewer marks if their mother was present and had stopped breeding, according to the study’s analysis of data and images gathered by theCenter for Whale Researchin Friday Harbor, Washington. The center has been studying thiscritically endangered groupof killer whales, which now number around 75, since 1976. Some 103 orcas were involved in the research due to births and deaths over the course of the study period.

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).”

Rising dividends screen ✌️【Short-Term Contract】✌️ Expert stock predictions and free stock selection services to help you achieve optimal returns and long-term growth. The researchers found no evidence that postmenopausal orcas — which can expect to live some 22 years on averageafter they stop reproducing — reduce the bite marks on their daughters. Nor did breeding mothers or grandmothers reduce the rate of these socially inflicted injuries in their offspring.

“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.

Rising dividends screen ✌️【Short-Term Contract】✌️ Receive professional stock analysis with real-time updates on market movements. Make quick investment decisions and capitalize on profitable opportunities. Why not protect orca daughters? Grimes said that it makes more evolutionary sense for the orca matriarchs to focus on their sons because they have more potential to pass on their mother’s genes — and in a way that doesn’t put any additional burden on the group.

“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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