One of the problems with the capture-recapture method is that in some animal populations there are individuals that are trap-happy (easy to trap) and others that are more cagey and hard to trap. Too many trap-happy individuals can skew the data (see Exercise 62 ). A removal method is a method for estimating the N-value of a population that takes into account the existence of trap-happy individuals by trapping them and removing them. In the first “capture,” individuals from the general population are trapped, counted, and removed from the habitat so that they can't be trapped again. In the “recapture,” individuals from the remaining population (those that had not been trapped before) are trapped and counted. The number of individuals trapped in the capture can be denoted by
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Excursions in Modern Mathematics (9th Edition)
- Linear Algebra: A Modern IntroductionAlgebraISBN:9781285463247Author:David PoolePublisher:Cengage Learning