Multiple Choice
Which of the following factors is most likely to decrease human population growth rates?
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50. Population Ecology
Introduction to Population Growth Models
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An island has a population of 10,000 rabbits at the beginning of the year. During the year, there were 400 births and 150 deaths. Calculate the population growth rate and the per capita population growth rate.
A
ΔN/Δt = 250 rabbits/year; r = 0.25 rabbits/year/rabbit
B
ΔN/Δt = 250 rabbits/year; r = 2.5 rabbits/year/rabbit
C
ΔN/Δt = 250 rabbits/year; r = 0.025 rabbits/year/rabbit
D
ΔN/Δt = 550 rabbits/year; r = 0.0025 rabbits/year/rabbit
Verified step by step guidance1
Identify the initial population size (N) of rabbits, which is 10,000.
Calculate the change in population size (ΔN) by subtracting the number of deaths from the number of births: ΔN = 400 births - 150 deaths.
Determine the time interval (Δt) over which the population change occurs, which is 1 year.
Calculate the population growth rate (ΔN/Δt) by dividing the change in population size (ΔN) by the time interval (Δt).
Calculate the per capita population growth rate (r) by dividing the population growth rate (ΔN/Δt) by the initial population size (N).
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