Population size estimation based upon ratios of recapture probabilities

Capture-Recapture Estimation of Population Size

Estimation of population size based on additive hazards models for continuous-time recapture experiments.

We use the semiparametric additive hazards model to formulate the effects of individual covariates on the capture rates in the continuous-time capture-recapture experiment, and then construct a Horvitz-Thompson-type estimator for the unknown population size. The resulting estimator is consistent and asymptotically normal with an easily estimated variance. Simulation studies show that the asympt...

Estimation of age-specific breeding probabilities from capture-recapture data.

We provide a new method for estimating the age-specific breeding probabilities from recaptures or resightings of animals marked as young. Our method is more direct than previous methods and allows the modeler to fit and compare models where the age-specific breeding proportions are equal over different cohorts or are a function of external covariates.

A Review of Methods for Point and Interval Estimation of Population Size in Capture-Recapture Studies

Estimates of population size in a classical capture-recapture experiment are obtained by method of moments and maximum likelihood estimation. Exact confidence intervals using the hypergeometric distribution (the general method) and approximate confidence intervals using the normal approximation and separately, the binomial approximation are illustrated. Estimates of coverage probabilities are e...

Robust estimation of population size in closed animal populations from capture-recapture experiments.

In this paper the problem of finding robust estimators of population size in closed K-sample capture-recapture experiments is considered. Particular attention is paid to models where heterogeneity of capture probabilities is allowed. First, a general estimation procedure is given which does not depend on any assumptions about the form of the distribution of capture probabilities. This is follow...