Estimating resource selection functions from samples of resource units using proportional hazards and log-linear models

Abstract

In this chapter, three models for sample resource selection data are discussed, where the samples can be of available resource units, used resource units or unused resource units. The differences between these models are related to the sampling protocols A, B and C that have been defined in section 1.4, but an extra important factor is the proportion of available units that are used. The first model is appropriate when either sampling fractions are known or a large proportion of resource units are used, and samples of used and unused units are taken. The second model is appropriate when only a small fraction of the available resource units are used and samples of available and used resource units are available. The third model is appropriate when an appreciable proportion of resource units are used and only samples of unused units are taken.