Removal, catch-effort and change-in-ratio
In Chapter 2, we introduced maximum likelihood estimation for the case where abundance (N) was unknown, but detection probability (p) was known (or at least assumed). In Chapter 4, we dealt with the only wildlife survey methods in which p is known — and is equal to 1. In this chapter we consider for the first time the more common scenario in which neither N not p are known. We again use the data from our example population to illustrate the problem and the methods.
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