ECOLOGY 10 Sample Period 5 of 6 Figure 21 Calculating popula

10 Sample Period 5 of 6 Figure 2.1. Calculating population size using the regression method. Shaded area under the regression line is equal to the population size The Moran-Zippin method is a simplified version of a regression analysis and requires that the investigator take only two samples to serve as points from which a line (with its slope and intercepts) can be calculated. The population size is estimated using equation 2.2: n2) (Equation 2.2) where Nis the estimate of the population size, ni is the number of individuals removed from the population in the first sampling period, and n2 is the number of animals removed from the population during the second sampling period. Does the removal method rely on the same set of assumptions as the mark-recapture method? Explain your answer.

Solution

2) Woodlot W3 seems inconsistent. It could make the mean drastically larger if this value is included. It is misleading the distribution in certain central tendency measurements, which increase the average substantially. What might be done in our view is to include standard error calculations. This would give a range of values which are known as confidence Intervals.

Moreover, plotting the data and then adding a trendline to it would give the regression analysis. The inconsistent point would lie a little faraway from the trendline or regression line and thus can be clearly reported as inconsstency.

3) Total no. of Grophers = whole woodlot area (hectare²) X mean density

Mean density is already been calculated so, in that case we are left with the whole woodlot area that would be required as an additional information.