A group of field biologists goes out to mark beetles living in an area around a local pond in order to estimate population size. They capture 500 beetles on the first day. They return the following day and catch a total of 400 individuals, 200 of which are marked. What is the estimated population size for the beetles?

Question

Biology

Susan Lawson

14 August, 10:50

A group of field biologists goes out to mark beetles living in an area around a local pond in order to estimate population size. They capture 500 beetles on the first day. They return the following day and catch a total of 400 individuals, 200 of which are marked. What is the estimated population size for the beetles?

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Lovely · Answer 1

Answer: 1000

Explanation:

N = (M*C) / R

N = estimated Number of individuals in the population

M = number of individuals captured and Marked

C = total number Captured the second time (with and without a mark)

R = number of individuals Recaptured (those with a mark)

N = (500*400) / 200

N = 1000