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How do you calculate total population using capture recapture?
Wiki User
∙ 15y ago
# Catch a sample of the population (e.g. birds, whales, crickets)
# Count how many are in your sample (=A)
# Tag them all so that you will recognise them if you see them again # Let them go # Leave enough time for them to mix in with the rest of the population # Catch another sample of the population (=B)
# Count at how many are tagged from before (=T)
The population size is then estimated by calculating
A X B / T
(Amanda Burls)
Wiki User
∙ 15y ago
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What is the formula to calculate size of a sample?
by using the capture-recapture method which gives you the total size of organisms in a population.
How do you calculate death rate?
You take the total number of deaths and divide it by the total population, then times that by 100 and you will get the total death rate.
How do you calculate the employment-population-ratio?
Number of people employed divided by total population tells you what percent of the population is employed. If you have 10,000 people and 9,500 of them have jobs, then 95% of the population is employed (9500 / 10000 = .95).
What is 4 plus 1.6 equals as a percentage?
The summation is 5.6 A percentage of what? You must give the total population to calculate 5.6 how much of it in percentage.
A bacteria doubles every 30 minutes how many after 24 hours?
That's a total of 48 doublings, so you calculate 248.That's a total of 48 doublings, so you calculate 248.That's a total of 48 doublings, so you calculate 248.That's a total of 48 doublings, so you calculate 248.
What is the formula to calculate size of a sample?
by using the capture-recapture method which gives you the total size of organisms in a population.
What are four ways to determining population size?
Sampling - counting the number of organisms in a small area and multiplying to estimate the number in a larger areaMark & Recapture - capture an organism & release it to remix with population. Then recapture some more in that area to determine population size. Formula is as follows: R (marked recaptures) / C (total in second sample) = M (marked initially) / N (total pop. size)Indirect Observation - estimating the population size by tracks, nest or other animal signs in an ecosystem.Direct Observation - count all members of a population in an ecosystem
How do you calculate population distribution?
To calculate population distribution, one must know the total of the population, as well as, the total area of the land in which the population is in. Then, the total population is divided by the total area. The population distribution is answered in square kilometers and square miles.
How do scientists measure wild life populations such as a rabbit?
One method is the capture-recapture method.Some rabbits are captured, tagged and then released back to the wild. After allowing some time for them to mix back into the population, the capture process is repeated.Suppose the total number of rabbits originally tagged was X. Suppose at the recapture stage, there are T tagged rabbits out of a total of C captures. Then T:C represents the ratio of tagged rabbits to all rabbits in the recaptures. If the rabbits have been given enough time to be evenly mixed in the overall population, then the total population is X*(T/C).This method depends crucially on the assumptions that there is no bias in either stage of capture/recapture. If these are carried out near a rabbit colony then the result might reflect only the colony population, not the whole population. The second assumption is that there has been enough time to allow the population to be mixed again. This might not be the case if the animals are very territorial so that the recapture would act on the same sub-population again. There is also the assumption that the tagging process does not affect the animal in any way. It can traumatise the animal in such a way that its behaviour is modified. It is also possible that any contact with human beings leaves a trace which other animals can react to.[The last is based on local advice: I live close to a park which is inhabited by deer. They are so used to human beings that it is possible to go up to fawns and touch them - and children love doing that. But that leaves a human scent on the fawn which then spooks the mother. The fawn can be rejected and suffer the consequences - which could be death!]
How do you calculate incident rates?
number of cases / total population
How do you calculate a nation's per capita income?
To calculate the per capita income you must first know the total personal incomeand the population for the area in which you want to calculate per capita incomeand divide the total personal income (i.e the GDP) with the total population .
How do you calculate immigration rate?
# of immigrants/ total population x 1000
How do you calculate death rate?
You take the total number of deaths and divide it by the total population, then times that by 100 and you will get the total death rate.
What is the total population of midlands UK?
See link regarding population centers. This may give you enough to calculate what you need.
How do you calculate population ratio?
Number of people employed divided by total population tells you what percent of the population is employed. If you have 10,000 people and 9,500 of them have jobs, then 95% of the population is employed (9500 / 10000 = .95).
How do you calculate the Employment-population ratio.?
Number of people employed divided by total population tells you what percent of the population is employed. If you have 10,000 people and 9,500 of them have jobs, then 95% of the population is employed (9500 / 10000 = .95).
How do you calculate the employment-population-ratio?
Number of people employed divided by total population tells you what percent of the population is employed. If you have 10,000 people and 9,500 of them have jobs, then 95% of the population is employed (9500 / 10000 = .95).
