Estimating Prey Preference by Predators: Uses of Various Indices, and a Proposal of Another Based on χ2
- 1 June 1982
- journal article
- research article
- Published by Canadian Science Publishing in Canadian Journal of Fisheries and Aquatic Sciences
- Vol. 39 (6) , 914-923
- https://doi.org/10.1139/f82-122
Abstract
A really useful prey-selection index should be statistically testable. A 2 × 2 contingency table formulation provides a simple way to test the significance of any degree of selection at any sample size. An index ranging from −1 to +1, and zero-valued for no selection, can be simply derived from the chi-square formulation. Some conflicting usages in biological statistics texts are discussed, as well as the usefulness and limitations of other commonly used indices.Key words: selection, index, chi-square, exact test, preyThis publication has 8 references indexed in Scilit:
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