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Use the information on capture-recapture method... - WAEC Biology 2011 Question

Use the information on capture-recapture method to calculate the total number of organisms in a habitat.
First capture = 200
Second capture = 120
Number of organisms with mark in second capture = 40

The total number of organisms therefore is

A
200
B
360
C
600
D
800
correct option: c

The formula for estimated population is

\(\frac{No of marked in 1st capture}{No of species} = \frac{No of marked in 2nd capture}{no of species in 2nd capture}\)

= \(\frac{200 \times 120}{40} = 600\)

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