Extra Math Practice:
1. Isle Royale Moose and Wolf Counts
Year
1996
1997
1998
1999
2000
2001
# of Moose
1163
451
700
154
850
900
# of Wolves
22
24
14
25
29
19
a) What is the overall trend for the moose population and wolf
population? (determine if they are increasing or decreasing or staying the
same)
b) Calculate the rate of population change in the wolf population from 2004 to
2011. SHOW YOUR WORK FOR FULL CREDIT!
c) Calculate the rate of population change in the wolf population from 2007 to
2011. SHOW YOUR WORK FOR FULL CREDIT!
d) If the area of the island is approximately 530 kilometers squared (km2),
what is the population density of moose in 1996 and 2011? SHOW YOUR
WORK FOR FULL CREDIT!
e) If the area of the island is approximately 530 kilometers squared (km2),
what is the population density of moose in 2002 and 2007? SHOW YOUR
WORK FOR FULL CREDIT!
Population Growth
Population size is the number of individuals that make up a population. Immigration and births
increase population size. Emigration and deaths decrease population size. The table below shows
how different populations changed over a one-year time span.
Follow the directions.
2. Study each population. Determine whether the overall population size has
increased or decreased.
3. If the population size has increased, draw an arrow that points upward in the
last column.
4. If the population size has decreased, draw an arrow that points downward.
The first one has been done for you.
Population
Births
Deaths
Number of
People Who
Emigrated
Number of
People Who
Immigrated
A
200
100
0
0
B
10
10
100
0
C
1
1
1
50
D
10
100
100
10
E
100
200
0
0
F
50
1
1
50
G
10
10
0
100
Population
Size
Answer the questions.
5. Study population G. What would happen to the population size if
100 people emigrated?
6. A food shortage causes many members of a population to leave an
area. What type of population movement does this describe? Circle
the correct answer.
emigration
immigration
7. What caused the population size of population C to increase? .
8. In Oswego, there was a population of 30 turtles counted in a 10 acre marsh at
the start of a 10 year period. After studying the turtles, it was noted that they had
a high natality rate of 20 turtles per year. Their mortality rate was only 5 turtles
per year. 8 turtles per year moved in to the area while 12 turtles emmigrated.
a. At what rate did the population of turtles change?
b. After 5 years, how many turtles would have been in the marsh?
c. At the end of 10 years, what was the population of turtles?
d. What was the initial population density of turtles in the marsh?
e. What was the final population density of turtles in the marsh?
f. Thinking Question: What will happen to the resources in this marsh? What
affect will the change in resources have on the turtle population?
9. In Aurora, there is a population of deer that was measured in a 15 acre
forest preserve over a 5 year period. The following data was collected:
Year
2008
2009
2010
2011
2012
Deer Population
25
20
14
18
21
a. Did the deer population increase or decrease
overall?
b. At what rate did it change over those 5 years?
c. What was the population density of the deer in
2009?
10. A class of OE Biology students conducted a survey of dandelions using the
random sampling method. Calculate the estimated dandelion population for the
given area. Show your work.
3
5
4
1
2
6