▪ A population at any given time is composed of individuals of different ages. When the age distribution (per cent individuals of a given age or age group) is plotted for the population, the resulting structure is called age pyramid.
▪ For human population, the age pyramids generally show age distribution of males and females in a combined diagram.
▪ The shape of the pyramids reflects the growth status of the population and is of three types:
a. Expanding (Triangular shaped pyramid)
b. Stable (Bell shaped pyramid)
c. Declining (Urn shaped pyramid).
▪ The pyramids also indicate the ratio of pre-reproductive, reproductive and post-reproductive individuals in a population.
Representation of age pyramids for human population
Through analysis of the age pyramids of a population proper planing of health, education, transport, infra-structure, finance, food and employment can be done.
Thus, long-term management of resources can be done so that maximum benefits can be provided to the population.
