Q.Differentiate Natality and Mortality.
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Start your 14-day free trial to unlock the full solution →Natality (birth rate) increases population size by adding new individuals through reproduction, whereas mortality (death rate) decreases population size through the loss of individuals — together they are two of the four key determinants of population growth.
In population ecology, the size and density of a population change over time due to four processes: natality, mortality, immigration and emigration. Natality refers to the number of births (or, more generally, new individuals produced through reproduction — births, hatchings, germinations, or fissions, depending on the organism) occurring within a population per unit time; under ideal, unlimited resource conditions, a species has a maximum possible natality called absolute or maximum natality, while the natality actually observed under prevailing real environmental conditions is called realised or ecological natality, which is always equal to or less than the maximum. Mortality refers to the number of deaths occurring within the population per unit time due to factors such as predation, disease, starvation, competition, accidents or old age; like natality, it can be expressed as a minimum (theoretical, under ideal conditions) or as the realised/ecological mortality actually observed. Natality is a positive factor that adds …
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