Capture Mark Release Recapture

 To understand how different physical or biological factors influence the distribution or abundance of species, we usually need to measure changes in population abundances over space or time. Ecologists interested in questions about populations and communities frequently face a very basic question: how best to estimate the size of a population of organisms in the field? However, it usually is not possible to obtain a complete count or census of a natural population of animals (and it is often difficult even for plants!). For this reason, ecologists generally have to rely on some kind of estimate of abundance or density. A variety of methods exist to do the job; the utility of each varies depending on such factors as the type of organism, the habitat in which the population occurs, and the time and equipment available.

Capture Mark Release Recapture (CMMR) that mark, release and recapture sample population as a method of observation. CMMR is a method commonly used to estimate the population size. The first thing to do is determine where that will estimate, then calculate and identify it, and the results can be made in the system list. CMMR method does this by taking and releasing a number of black and white buttons were considered a population scattered in nature. The results show the enormous population that is marked with white buttons and will be marked with black buttons.

From the result of the arrest, it can be expected size or the size of the population by the formula: description:

N: Lincoln-Peterson method

N = Mn / m + √ (M). (N). (Mm). (Nm) / m ³

^and

N = Mn / m - √ (M). (N). (Mm). (Nm) / m ³

N - x = a and N + x = b

A <N <b

 

N: Count the total individual in nature to be estimated in a population.

M: Count tercuplik individuals first and tagged, then released again.

n: Counting individual tercuplik in the next period.

m: Counting individual marked caught again in the second period and the next. 

https://www.slideshare.net/ChristopherHassall/capturemarkrecapture-cmr-as-a-method-for-species-monitoring-at-a-landscape-scale