By Joshua Mitteldorf
Because the Nineties, laboratory characterization of getting older has been diverging from predictions of evolutionary concept, particularly within the sector of genetics. simultaneously, a technology of multilevel choice has came upon its position within the evolutionary literature. the writer means that proof warrants attention of a brand new paradigm for evolution of getting older, and proposes the demographic conception of senescence, wherein getting older has been affirmatively chosen since it degrees the dying cost over the years, supporting to stabilize inhabitants dynamics and stop extinctions. Read more...
summary: because the Nineteen Nineties, laboratory characterization of getting older has been diverging from predictions of evolutionary idea, in particular within the quarter of genetics. at the same time, a technological know-how of multilevel choice has stumbled on its position within the evolutionary literature. the writer means that proof warrants attention of a brand new paradigm for evolution of getting older, and proposes the demographic conception of senescence, wherein getting older has been affirmatively chosen since it degrees the loss of life fee through the years, assisting to stabilize inhabitants dynamics and stop extinctions
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Additional info for Aging is a group-selected adaptation: theory, evidence, and medical implications
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Aging is able to complement the death rate from starvation or disease, because it only adds to the death rate when the other threats to the population are low enough that individuals are living long enough that aging can kick in. In other words, when everyone is dying of starvation (or of an epidemic, earthquake, or forest fire), they are not dying of old age. Aging has little effect on the death rate at such times, but only when these other threats to life have backed off sufficiently that some animals can live into old age.