Perform tests to determine whether a population sampled by capture-recapture is closed to gains and losses over the period of sampling.
closure.test(object, SB = FALSE, min.expected = 2)capthist objectIn the case of a single-session capthist object, either a vector with the statistic (z-value) and p-value for the test of Otis et al. (1978 p. 120) or a list whose components are data frames with the statistics and p-values for various tests and test components as follows --
Check the original papers for an explanation of the components of the Stanley and Burnham test.
In the case of a multi-session object, a list with one component (as above) for each session.
The test of Stanley and Burnham in part uses a sum over 2x2 contingency tables; any table with a cell whose expected count is less than min.expected is dropped from the sum. The default value of 2 is that used by CloseTest (Stanley and Richards 2005, T. Stanley pers. comm.; see also Stanley and Burnham 1999 p. 203).
Otis, D. L., Burnham, K. P., White, G. C. and Anderson, D. R. (1978) Statistical inference from capture data on closed animal populations. Wildlife Monographs 62, 1--135.
Stanley, T. R. and Burnham, K. P. (1999) A closure test for time-specific capture--recapture data. Environmental and Ecological Statistics 6, 197--209.
Stanley, T. R. and Richards, J. D. (2005) A program for testing capture--recapture data for closure. Wildlife Society Bulletin 33, 782--785.
White, G. C., Anderson, D. R., Burnham, K. P. and Otis, D. L. (1982) Capture-recapture and removal methods for sampling closed populations. Los Alamos National Laboratory, Los Alamos, New Mexico.
capthist