At the beginning of the year the population of voles in a valley
consists of 12,103 individuals. 7,110 voles are born in the valley.
589 voles immigrate. 7,300 voles are eaten by predators, 143 are
caught in mouse traps and 1 dies of old age. 412 voles emigrate.
Answer the following questions showing your
A. How many died during the year?
B. What is the net migration rate?
C. What is the rate of population change?
D. What was the new population size at the end of the year?
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