Biology
Population Growth
Calculate the change in population over a period.
Population Growth = (Births + Immigration) - (Deaths + Emigration)
Formula Explanation
Population size changes through births, deaths, immigration and emigration.
Variables Explained
Births = New individuals born; Immigration = Individuals entering; Deaths = Individuals dying; Emigration = Individuals leaving.
Solved Example
A population has 30 births, 10 immigrants, 12 deaths and 3 emigrants. Find the net change.
Net change = (30 + 10) - (12 + 3) = 25 individuals.