Published Online: 15 JAN 2013
Copyright © 2002 John Wiley & Sons, Ltd
Encyclopedia of Environmetrics
How to Cite
Udevitz, M. S. 2013. Change-in-Ratio . Encyclopedia of Environmetrics. 1.
- Published Online: 15 JAN 2013
Change-in-ratio (CIR) methods are used to estimate parameters for ecological populations subject to differential removals from population subclasses. Subclasses can be defined according to criteria such as sex, age, or size of individuals. Removals are generally in the form of closely monitored sport or commercial harvests. Estimation is based on observed changes in subclass proportions caused by the removals.
- encounter probabilities;
- population size;
- removal methods;
- sampling effort