Direct and correlative phenotypic selection on life-history traits in three pre-industrial human populations

Proceedings. Biological Sciences
P KäärI Kojola

Abstract

Because natural selection acts simultaneously on several correlated traits, can be under both direct and correlative selection simultaneously. Correlative selection may either weaken or magnify the association between a trait and fitness. Direct effect of a single trait on fitness can be assessed by removing the effects of correlative selection with multivariate techniques. We studied the phenotypic selection on demographic life-history traits in three pre-industrial human populations, which experienced different mortality environments. We used path-analysis to estimate direct and correlative selection on different traits in females and males. Our results indicate substantial differences among the sexes in the force of phenotypic selection on key life-history traits. For females, the most important component of reproductive success was the age at first reproduction. Most important component of fitness for males was the quality of mate. In addition, our analysis revealed considerable among-population variation in the selection on life-history traits. These differences are in accord with the historical notes of among-population variation in the lifestyle and harshness of the environment, suggesting that among-population variation...Continue Reading

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Citations

Aug 6, 2004·Proceedings of the National Academy of Sciences of the United States of America·Samuli HelleJukka Jokela
Feb 11, 2005·Proceedings of the National Academy of Sciences of the United States of America·Jenni E PettayVirpi Lummaa
Oct 5, 2011·Proceedings of the National Academy of Sciences of the United States of America·Emmanuel MilotDenis Réale
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Oct 5, 2012·Proceedings. Biological Sciences·Stephen C StearnsSean G Byars
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Oct 15, 2013·Evolution; International Journal of Organic Evolution·Anja Bürkli, Erik Postma
Apr 8, 2004·Evolution; International Journal of Organic Evolution·Samuli HelleJukka Jokela
Jul 12, 2008·Evolution; International Journal of Organic Evolution·Jenni E PettayVirpi Lummaa
Mar 30, 2016·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Douglas Ewbank
Mar 30, 2016·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Cristina MoyaRebecca Sear
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Dec 20, 2017·Proceedings of the National Academy of Sciences of the United States of America·Jaleal S SanjakPeter M Visscher
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Sep 6, 2017·PLoS Biology·Hakhamanesh MostafaviJoseph K Pickrell
May 11, 2018·Nature Reviews. Genetics·Stephen CorbettStephen Stearns

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