BIO205H5 Lecture Notes - Lecture 8: California Quail, Exponential Growth, Doubling Time
Document Summary
Demography: the study of populations: applied to all organisms on earth. Intrinsic growth rate (r): the highest possible per capita growth rate for a population: under ideal conditions, individuals experience maximum r. Exponential growth model: a model of population growth in which the population increases continuously at an exponential rate; described by the equation: applies to species that reproduce throughout the year. Most species have discrete breeding seasons (e. g. , the. Nt = n0 t: example: we have a population of 100 quail, the annual growth rate, = 1. 5 and we want to know the size ( n) of the population after 5 years: Ns = 100 x 1. 55 = 759 quail: to determine the change in population size ( n) between initial population size and t time intervals: N = n0 n0 = n0 ( t 1) N = 100 (1. 55 -1) = 659 quail. Thus the change in population size after 5 years will be 659.
