The Mathematics of Bird Population Growth and Decline

Abstract

The annual changes in a bird population with constant mortality and fertility can be calculated with the aid of tables here given. Under these conditions a population of a species maturing at 1 year remains steady, or increases or decreases in a geometrical progression. If maturity is postponed for 2 or more years, there are damped oscillations round stability or a geometric progression. The relation between mortality and fertility is calculated in the general case, and some applications to published work are given.