population structure


population structure
  the ratio of age groups, by sex, within a population.

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  • Population structure — may refer to many aspects of population ecology:* Population stratification * Population pyramid * Age class structure * F statistics * Population density * Population distribution * Population dynamics and population growth * Population genetics …   Wikipedia

  • population structure — the characteristics of a given population such as age, size composition, sex ratio, etc …   Dictionary of ichthyology

  • Population stratification — is the presence of a systematic difference in allele frequencies between subpopulations in a population possible due to different ancestry. Population stratification is also referred to as population structure. Causes of population stratification …   Wikipedia

  • Population genetics — is the study of the allele frequency distribution and change under the influence of the four evolutionary forces: natural selection, genetic drift, mutation and gene flow. It also takes account of population subdivision and population structure… …   Wikipedia

  • population ecology — Introduction       study of the processes that affect the distribution and abundance of animal and plant populations.       A population is a subset of individuals of one species that occupies a particular geographic area and, in sexually… …   Universalium

  • population — populational, adj. populationless, adj. /pop yeuh lay sheuhn/, n. 1. the total number of persons inhabiting a country, city, or any district or area. 2. the body of inhabitants of a place: The population of the city opposes the addition of… …   Universalium

  • Population groups in biomedicine — Biomedical researchers subdivide populations into groups with the goal of improving the prevention and treatment of diseases. Many studies have found that disease susceptibility and environmental responses vary among U.S. ethnicities, among New… …   Wikipedia

  • Population de Nauru — Démographie de Nauru La population de Nauru n est que de 13 528 habitants (juillet 2007) selon le CIA World Factbook soit le 191e pays en termes de classement[1]. Le pays ayant une superficie de 21,3 km2, cela représente une densité de… …   Wikipédia en Français

  • Population du Japon — Démographie du Japon Évolution démographique Le Japon compte 127 millions d habitants en 2008 avec un des taux de natalité les plus bas du monde : 7,87 naissances pour 1 000 habitants[1]. L …   Wikipédia en Français

  • Population japonaise — Démographie du Japon Évolution démographique Le Japon compte 127 millions d habitants en 2008 avec un des taux de natalité les plus bas du monde : 7,87 naissances pour 1 000 habitants[1]. L …   Wikipédia en Français


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