Population Density

Population Density

Population Density is the amount of individuals in a population in an area.

There is 1 red eared slider in the 4 ft x 1 ft x 2 ft tank.

World’s Population Density

Mongolia is the least densely populated country, Monaco is most densely populated

Population Density of US

District of Columbia most dense, NJ 2nd most.

Alaska is least dense. Illinois is 12th most.

Equation

Population # of Individuals Density = ----------------------------------

Total Area

REMEMBER TO INCLUDE UNITS AND WORK!!

Area

3D areas (ponds, tanks)

Area = length x width x height

Answer is expressed in m3, ft3, cm3, etc.

2D areas (flat)

Area = length x width

Answer is expressed in m2, ft2, cm2, etc.

Growth Rate

End Pop. – Beginning Pop ------------------------------------- x 100% = Growth

Beginning Pop. Rate

Questions

What is the population density if there are 32 fish in an area that is 250 m3?

32 fish ---------- =

250 m3

The answer is .128 fish per m3

Questions

What is the population density if there are 1068 birds in a field that is 100 m wide and 250 m long?

1068 birds-------------------------- = (250 m x 100m)

The answer is .043 birds per m2

Questions

10 years ago there were 36 bullfrogs in the BHS pond. Now, there are 152. What is the growth rate of frogs in our pond?

(152 frogs – 36 frogs)---------------------------- x 100% =

36 frogs

The answer is 322.2%