It is assumed that mar does not influence an individual animal\'s probability of

Question

It is assumed that mar does not influence an individual animal's probability of recapture. Describe how king being initially captured and marked could increase or decrease an individual's probability of recapture 5a. For NU students 5b. For wildlife Marks should not be lost between capture and recapture. How can a researcher attempt to insure that this assumption is met? What would happen to the estimate if marks were lost? Tragically, fifty people died from opioid overdose in Buffalo, New York, between January 1 and February 5 2017 (Buffalo News February 6, 2017) How could you use methods to estimate of population size you learned about in lab to estimate the total size of the population of people over-using opioid drugs in order to improve assistance to these people? Describe which assumptions of the Lincoln Peterson Method might be hard to control for in your study. Give an example of one of the assumptions that might be violated, and the effect this may have on the outcomes of your study. Examine the data collected in the city of Porto Alegre, Brazil in 2006: Which method could you use to estimate the size of the injection drug user (IDU) population in this study (given the data available in Table 1)? What was the estimated number of injection drug users (IDUs) in Porto Alegre according to the data in Table 1? Calculate a 95% confidence interval for your result.

Explanation / Answer

5. Mark and Recapture method involves initially marking some individuals in a population in a natural way, and then allowing them to return to their population allowing them to mix up with them completely so that there is a random distribution of marked individuals in population. Later on recapturing few of them to estimate the size of their population at the time of initial capture and release. So, Initial capture and marking does not affect an individual's tendency of recapture, either in individuals or in wild life. Chances of each individual to be caught are equal in both initial marking and recapture phases. because sufficient time is given to marked individuals to mix up in their population, during this time there should be no addition or loss of individuals from the population.

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