3bEstimatingPopulationSize

Individuals with marks have the same probability of

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Unformatted text preview: . Individuals with marks have the same probability of survival as other members of the population. It is important to choose a marking method that does not harm your animal. If a predator used your paint marks to locate and capture marked turtles at a higher rate than other turtles, your number of recaptures would be lower, and the estimate would therefore be too high. 2. Births and deaths do not occur in significant numbers between the time of release and the time of recapture. If marked individuals die and are replaced with newborns, then you will recapture few or no marked individuals, and your estimate will be too high. This is not a large concern in studies of box turtles, but can significantly affect estimates for rapidly breeding organisms. 3. Immigration and emigration do not occur in significant numbers between the time of release and the time of recapture. If marked individuals leave the study area and new unmarked individuals come in to replace them, you will get fewer recaptures than the equilibrium population size would lead you to expect. T...
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