Description: To find out if grizzly bears, northern spotted owls, whooping cranes, and black-footed ferrets are disappearing, it is necessary to estimate the size of these and many other vertebrate populations at different times. It is not as easy as simply counting and comparing counts taken at different times. Issues of sampling, parameter estimation, plot size and shape, abundance, density, and distribution all impact statistical methods for detecting changes in the size of a population and the extent of its range. This book is devoted to detecting any sort of change in the number and distribution of vertebrates. It deals with the general issues of surveying, monitoring, and estimating as well as dealing with the individual major vertebrate groups.

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