You have a headache thinking about your child's school fees higher and higher from year to year? Be thankfull !!! If you do not need to take care of kids, you're probably dead right now!!!
This theory was presented by Dr. Ronald Lee, a demography expert at the University of California at Berkeley, publised in the Proceedings of the National Academy of Sciences. He said that the role of caretaker is a descendant of the factors that determine the lifetime of a species.
Lee predicted, the death of the life cycle defined by a combination of two factors: Classical Exchange, the influence of the reproductive period, and the effect of the transfer, the economic term for the descendants of maintenance functions.
Biologists and demographers welcomes this theory. This is a development of the theory of aging put forward by William Hamilton. According to Hamilton, most animals died after the reproductive function because the duty to ensure the sustainability of the species has been completed. Meanwhile, descendants of species that need maintenance to survive given the opportunity to live longer. This theory is the classic explanation of how the evolution of genes that determine aligning the life cycle of each species.
However, there are things that can not be explained by classical theory, for example what human mortality in the first year of life is very high and then decreased with the addition of age.
Lee's theory is considered as a breakthrough in biological aging. Defines the classical theory of aging in relation to natural selection and fertility in the life cycle. Lee menambahan factor maintenance functions. According to Lee, the man began life as a "domesticated" and gradually became caretaker after having children.
According to Lee, the non-social species in which the parent does not need to maintain the child, apply the classical theory. Individuals die after the reproductive function. While the social species that has reached the optimum balance between the number of offspring and maintenance functions, differences in fertility are no longer important and the rate of aging is controlled entirely by the transfer effect.
Lee's theory explains the high number of infant deaths decreased dramatically with age. Mutation causes of death in late childhood, after a careful maintenance, lost faster than the mutation causes of death in infants. This theory also explains why women live longer even after menopause. Women maintain that child and prolong his age.
Do you agree or do you have another view on this issue? I have a question about this theory. Why did the tortoise could have a long life for hundreds of years even though during his life he never take care of their children??
