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richardrepp.com/research/Exemplary Practices/Elmwood/Capture...

Capture-recapture problems . Density problems . 1. Suppose that naturalists catch, tags, and release 50 deer in a forest. After allowing time. for the tagged deer to mix with the others, they catch a sample of 100 deer, 10 of which have. tags. What is the estimate for the number of deer in the forest? 2.

nrich.maths.org/9609

One way is to use the method of capture-recapture. Suppose scientists trap and electronically tag a number of badgers on one occasion, then release them back into the wild. They then set up detectors with cameras in several locations around the forest. Some time later, the scientists return to collect the cameras.

Sample problem: A pest control technician captures and applies ear tags to 23 brown rats, which he then releases. A week later he traps 29 brown rats, 11 of which have ear tags. What is the estimate of the total population of brown rats? Assumptions: The accuracy of this mark-recapture method rests on a number of assumptions being met. Assumption 1

en.wikipedia.org/wiki/Mark_and_recapture

Mark and recapture is a method commonly used in ecology to estimate an animal population's size. A portion of the population is captured, marked, and released. Later, another portion is captured and the number of marked individuals within the sample is counted.

Capture-recapture models have been used to estimate incidence of many diseases and health-related problems, including cancer, 9, 10 stroke, 11, 12 homelessness, 13 mental illness 13 and drug use. 14 It has been recommended that a simple capture-recapture analysis, with corresponding estimate of completeness, should accompany any results ...

www.proprofs.com/quiz-school/story.php?title=capture...

Here you can practice what you learned in class. The questions may see long, but I want you to think of this activity as not just a math problem, but as a way to approach and address situations ( such as- what is the problem? What do I need to know to solve the problem? How can I use what I know to solve the problem? ) (NOTE: remember to round of your calculated answers to the nearest number -i.

www.biologycorner.com/worksheets/estimating_population...

Objective: You will be expected to estimate the size of a sample population using the mark-recapture technique and compare the mark and recapture technique to other methods of population estimating. 1. You are given the responsibility of determining the number of fish in Horseshoe Lake. Discuss with ...

ispeakmath.org/2014/01/13/proportional-reasoning-capture...

You know a lesson is awesome when the Goldfish that the kids get to eat aren't even their favorite part of the lesson! I had done the Capture Recapture lesson a few years ago and it didn't go very well, so I abandoned it. However, after seeing a video about the concept (thanks to Alisan's…

probabilityandstats.wordpress.com/2010/02/16/the-capture...

The capture-recapture method is one of the methods for estimating the size of wildlife populations and is based on the hypergeometric distribution. Recall that the hypergeometric distribution is a three-parameter family of discrete distributions and one of the parameters, denoted by in this post, is the size of the population.

newonlinecourses.science.psu.edu/stat506/node/57

This is the direct sampling of capture-recapture where both the capture size and the second capture size are pre-determined. In Section 12.2, we discuss inverse sampling for capture-recapture where the initial capture size is pre-determined but we sample until a fixed number of tagged items are recaptured. Here, the second capture size is random.

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