Ch._14_Population_Growth_and_Regulation[1]

# Ch._14_Population_Growth_and_Regulation[1] - Chapter 14...

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Chapter 14 Population Growth and Regulation Population Growth Birth rate: the proportion of births in a population in a given time, typically per 1,000 individuals o #births/population size*1000 o Hypothetical population: 20 births in a year 500 total in population 20/500*1000 (.04)(1000)=10 births per 1000 in individuals Death rate: the proportion of deaths in a population in a given time, typically per 1,000 individuals o #deaths /population size*1000 o Hypothetical population: 10 deaths in a year 500 total in population 20/500*1000 (.04)(1000)=10 births per 1000 individuals Natural rate of increase o The difference in birthrates and death rates Birth rate-death rate= n/1000 per year 40-20=20/1000 per year increase o Or 2% increase Natality: the number of births in a population Mortality: number of deaths in a population Growth rate: percent growth of a population in a given period of time R= #at end- # atbeginning # at beginning Hypothetical population o 1000 individuals in the year 2006 o 1000 individuals in the year 2009 o (1150-1000)/1000

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Ch._14_Population_Growth_and_Regulation[1] - Chapter 14...

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