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Mark And RecaptureA term in science groups including ecology, mark and recapture studies is a way to state the size of a population. Direct and indirect observations, sampling, and mark and capture studies are all different ways of finding a number of individuals living in an organization inside an envinroment. The way it works How it works is by capturing a group of individuals, marking them and then sending them back to nature. Then, the time the group comes back, we find all the marked individuals within all of the group inside the ecosystem. Biologists use traps to capture the animals alive and mark them in some way. The animals are returned unharmed to their environment. Over a long time period, the animals from the population are continued to be trapped and data is taken on how many are captured with tags. A mathematical formula is then used to estimate population size. Calculations In order to estimate your population size, follow this formula Estimate of Total Population = (total number captured) x (number marked)divided by(total number recaptured with mark) Mark and Recapture Turtles? Let's say that you're a biologist... You need to find the population of Turtles in Lake Turtelinia. Now, you captured 10 of them, and you colored their back with red. You captured and marked them by now. Now, you capture 15 other turtles, and only 5 of them were marked. This means that the population is greater than if 10 or 11 of them were marked. But to figure out the estimated populatin in lake Turtelinia you need to multuply 10 by 15, and divide the answer by 5.
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