Category Archives: Trade Offs

How do you get control and power – Riot or take it for yourself?

Lack of power and control and low social status is a major factor in making us ill. So if we cannot change the system, how can we get more power, control and social status? This week we will look at how we might do … Continue reading

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Thesis 16

Thesis #16 - Among the most important physiological constraints on the action of natural selection are trade-offs between the biological functions underlying age-specific rates of survival and reproduction. One of the most important features of physiology that affects the evolution of … Continue reading

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Thesis 17

Thesis #17 - When such trade-offs arise from antagonistic pleiotropic effects of genetic variants, they sometimes maintain genetic variation for functional characters, and thus selectable genetic variation for patterns of aging. There are two kinds of trade-off which are important to … Continue reading

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Thesis 18

Thesis #18 - When such trade-offs can be physiologically tuned within the lives of individual organisms, natural selection may act to produce physiological machinery that provides plasticity which enhances average fitness. One of the basic features of natural selection is its … Continue reading

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Thesis 19

Thesis #19 - Such adaptive life-history plasticity will sometimes produce detectable trade-offs between survival and reproduction in the range of environmental conditions that prevailed when natural selection established such life-history plasticity. It is a general, though not universal, rule that, if … Continue reading

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Thesis 34

Thesis #35 – Severe antagonistic pleiotropy can cause the evolution of zero late-adult survival probability even under ideal conditions, when genetic trade-offs between early reproduction and subsequent adult survival are sufficiently strong. Not all organisms have three phases to their … Continue reading

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Thesis 45

Thesis #45 – Our ancestral hunter-gatherer populations had generally low population densities, and thus low effective population sizes, which produced relatively early cessation of aging at relatively high function due to genetic drift. With very low population densities among our … Continue reading

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Thesis 54

Thesis #54 – Older adults with significant agricultural ancestry cannot sustain their health with either agricultural or industrial patterns of nutrition and activity, and should instead switch to hunter-gatherer patterns of nutrition and activity in order to slow their later … Continue reading

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