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The literature on the analysis of capture-recapture studies has blossomed since the early 1990s.

There are very elaborate statistical models available for the analysis of these experiments.

A simple model which easily accommodates the three source, or the three visit study, is to fit a Poisson regression model.

Sophisticated mark-recapture models can be fit using Recapture, a package of the Open Source R programming language, or specialized programs such as MARK or M-SURGE.

Other related methods which are often used include the Jolly-Seber model ( used in open populations and for multiple census estimates ) and Schnabel estimators ( described above as an expansion to the Lincoln-Petersen method for closed populations ).

These are described in detail by Sutherland.