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mark-recapture technique

mark-recapture technique A technique for estimating the population density of more elusive or mobile animals. A sample of the population is captured, marked, and released. Assuming that these marked individuals become randomly distributed through the wild population, and that subsequent trapping is random, any new sample should contain a representative proportion of marked to unmarked individuals. From this, the size of the population may be estimated, most simply by multiplying the number in the first sample by the number in the second sample, and dividing the product by the number of marked individuals in the recaptured sample. This calculation is appropriate only when the population is fairly static or where changes (owing to migration, natality, or mortality) are known. It may also be distorted if marked individuals become more vulnerable to predators and if particular individuals become ‘trap-addicted’ or ‘trap-shy’. When a population is fluctuating rapidly, as is common in insect populations, more sophisticated indices, which allow for the probabilities of change, are preferable.

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"mark-recapture technique." A Dictionary of Ecology. . Encyclopedia.com. 27 Jun. 2017 <http://www.encyclopedia.com>.

"mark-recapture technique." A Dictionary of Ecology. . Encyclopedia.com. (June 27, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/mark-recapture-technique

"mark-recapture technique." A Dictionary of Ecology. . Retrieved June 27, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/mark-recapture-technique

mark-recapture technique

mark-recapture technique A technique for estimating the population density of more elusive or mobile animals. A sample of the population is captured, marked, and released. Assuming that these marked individuals become randomly distributed through the wild population, and that subsequent trapping is random, any new sample should contain a representative proportion of marked to unmarked individuals. From this, the size of the population may be estimated, most simply by multiplying the number in the first sample by the number in the second sample, and dividing the product by the number of marked individuals in the recaptured sample. This calculation is appropriate only when the population is fairly static or where changes (due to migration, natality, or mortality) are known. It may also be distorted if marked individuals become more vulnerable to predators and if particular individuals become ‘trap-addicted’ or ‘trap-shy’. When a population is fluctuating rapidly, as is common in insect populations, more sophisticated indices, which allow for the probabilities of change, are preferable.

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Pick a style below, and copy the text for your bibliography.

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"mark-recapture technique." A Dictionary of Zoology. . Encyclopedia.com. 27 Jun. 2017 <http://www.encyclopedia.com>.

"mark-recapture technique." A Dictionary of Zoology. . Encyclopedia.com. (June 27, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/mark-recapture-technique-0

"mark-recapture technique." A Dictionary of Zoology. . Retrieved June 27, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/mark-recapture-technique-0