BIOL 2Q04 Lecture 6: Population parameters
2 Dec 2015
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Document Summary
Age-specific summary of the mortality rates operating on a cohort of individuals. A snapshot of the population at a given time. Differs from a cohort table, in which a group of organisms is followed throughout life. A life table summarizes the mortality schedule of a population. To determine net population changes we must combine mortality estimates with reproduction estimates. These are finite rates expressions of changes observed in a distinct time interval (one month, one year) Rates may also be expressed as instantaneous (or continuous) rates, in which the time base becomes very short. Example: a population of 100 animals decreases to 90 animals in one month. Finite rate of population change = 90/100 = 0. 90 individuals per individual per month (a decline) o o o. Month 1 = 100 * 0. 9 = population of 90. Month 2 = 90 * 0. 9 = population of 81. Month 3 = 81 * 0. 9 = population of 72. 9.
