title: Strategies of adaptation: interpopulation selection differentials.
abstract: Spatial and temporal variation of selection intensities has been analyzed using published data on Crow's indices in 278 human populations, representing various anthropological types, religions, cultures and a wide spectrum of environmental conditions. Statistical analysis has shown that populations with different types of economy have different adaptive strategies. In tribal populations both components of selection-differential fertility and differential mortality-have equal contributions, vary according to ecological factors and show no decline with time. Urban populations of the industrially developed countries show dramatic selection relaxation; the second component becomes negligible due to a sharp decrease in childhood mortality; fertility and its variance are reducing due to cultural factors (family planning).
authors.affiliation: N.I. Vavilov Institute of General Genetics, Russian Academy of Science, Moscow, Russia. kurbatova@vigg.ru
authors.forename: Olga L
authors.initials: OL
authors.lastname: Kurbatova
authors.forename: Elena Yu
authors.initials: EY
authors.lastname: Pobedonostseva
authors.forename: Vitalina A
authors.initials: VA
authors.lastname: Privalova
mesh_terms: D000220:Adaptation, Biological; D002947:Cities; D005298:Fertility; D006801:Humans; D008954:Models, Biological; D009026:Mortality; D012426:Russia; D012641:Selection, Genetic; D012959:Socioeconomic Factors