Mammals develop larger brains when fathers take parental responsibility


Parents with larger brains tend to share parental responsibilities, according to a new study, when mothers and fathers are involved in raising children. The scientists also found that mammals with greater reproductive success tended to receive help from non-biological parents or single parents.

The researchers analyzed data on parental behavior, brain size and fertility of 478 species of mammals, including lions, rats, meerkats, monkeys and apes. Analysis shows various types of support tools for parents, different evolutionary achievements.

“And reproduction and brain tissue are very expensive energy and the way for women, by sharing the cost of care, is to share these costs with others to reduce them,” said Sandra Heldstab, an anthropologist at the University of Zurich. news. “Unlike previous research, we distinguish between father care and alloparintinniata because we expect the difference between how much you believe and what the effects are on brain size and fertility.”

The new study, published this week in the journal Behavioral Ecology and Sociobiology, based on the “expensive brain hypothesis,” shows that increasing brain size requires new energy sources to be stable and reliable for women.

Because support for male parents tends to be more stable and reliable than all-natal care, the swing tends to make sense that useful fathers are associated with increased brain size.

“Extra care by offspring of non-parents often changes when they adjust their care efforts, depending on the availability of food and their own reproductive needs,” said Heldstadt. “This type of treatment that cannot be predicted does not provide enough sound energy to influence brain size, but our results show that the additional energy given is related to a significant increase in fertility because women respond easily by adjusting the size of waste in varying amounts of energy resources. “

In the cerebrum and with high reproductive abilities people are in an emergency. The researchers suspect that the impressive combination might come from “parents of many parents”. At the beginning of the evolutionary history of people, mothers used stable and reliable help from parents and parents.

Of course, parenting is not the only way for mothers to find new energy sources for the achievement of evolution. Changes in diet, such as adding freshwater lobster or other water food sources, can also provide the extra energy needed to grow a larger brain.

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