get weaker as they age and die, but this is not the typical pattern among species. Some agencies do not seem to show signs of aging. These are among the findings of the first study of its kind, published in Nature. The study compares the aging patterns of humans and other species 45.
‘We all have preconceived ideas about aging and how it should be, “said Peter F. Quintana-Ascencio, a biologist at the University of Central Florida and one of the reviewers of the study. “But this study shows that we need a look at the aging in more depth. Not everything is what it seems between species. Humans, especially modern humans appear to be discrepant. »
team contrasted as vertebrates, invertebrates, plants and green algae grow older. Modern humans, frogs, lions, lice and cumulicola Hypericum, a plant native to Florida, were compared between species.
The study concluded that mortality of some species, such as birds and men, increases with age. For some, like Florida plant, growth is smaller. And for others, like the desert tortoise and certain trees, mortality decreases with age.
The researchers point out that there is a strong correlation between patterns of aging and expectation of life typical of the species. The species may have increased mortality and still live a long time, or have a decreased mortality and live a short time, say scientists at the Max-Planck Center Odense.
‘It makes sense to consider aging based on the age at which the species can reach, “said evolutionary biologist Owen Jones, the Max-Planck. “Instead, it is more interesting to define aging as trajectories based on mortality:. The rates increase, decrease or remain constant with age”
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