Population Size
Populations display distinctive behaviors based on their size. Small populations face a greater risk of extinction(Caughley 1994) Population Density
A more complete description of a population's size includes the population density — the size of a population in relation to the amount of space that it Age Structure
Age structure can be represented graphically with a population pyramid (Figure 3). Although a population's age structure is not always pyramidal in shape Fecundity
While maximum fecundity is a constant for populations, realized fecundity varies over time based on the size, density, and age structure of the population Mortality
To visualize mortality and fecundity within a population Sex Ratio
Interestingly, sex ratio is not always random but can be manipulated at birth by environmental or physiological mechanisms Demography examines the size, structure, and movements of populations over space and time. It uses methods from history, economics, anthropology, sociology, and other fields. Demography is useful for governments and private businesses as a means of analyzing and predicting social, cultural, and economic trends related to population.
Demographic analysis examines and measures the dimensions and dynamics of populations; it can cover whole societies or groups defined by criteria such as education, nationality, religion, and ethnicity.Three key demographic characteristics include a
population profile, a description of generational cohorts (baby boomers, Generation X, and Generation Y), and a description of racial and ethnic diversity.
Key takeaways:
- Demographics refer to the specific characteristics within a given population and include such things as age, income level and geographic location.
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