
The Lincoln Index provides a way to measure population sizes of individual species, It is based on the method: capture, mark, and recapture. This can be expressed by N1. Is equal to number of species first marked and released, N2. Is equal to number of species capture in the second sample, M2. Is equal to number of species marked in the second sample, N. Is equal to total of population. the way of figuring out N is by a simple cross multiplication in which N1 multiplied by N2 and divided by M2 is N. The process for the lincoln index is simple, firs you need to capture a random sample of population and marked them all , notice is very important that the mark you put on the animal doesn't affect his natural way of living you can achieve this by putting a little mark on it. Then release them in their natural environment and let them mix into their population again, then wait some time and recapture another random sample of population and count the number of population marked, finally do the cross multiplication to estimate the size of the population.
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