Population ecology is the study of how populations — of plants, animals, and other organisms — change over time and space and interact with their environment. Populations are groups of ...

Generalized variance functions (GVF's) are used in a number of sample surveys as a convenient method of publishing sampling errors. The method consists of estimating the relative variance (relvariance ...

A new technique for making inferences about finite population "parameters" is developed and shown to be applicable for any survey design. Two example applications are given: the estimation of strata- ...

Some special challenges arise when sampling these populations. In particular, it may be difficult to find a sampling frame or list for the population of interest, and this may influence how the ...