Year: 1994
Type: conference-paper
Abstract: In competition studies, two species are studied, generally in ratios of 1:0, 3:1, 1:1, 1:3, and 0: 1.The standard measure of competition is the Relative Crowding Coefficient CRCC) Xl:l/'Yl:l Xl: 01 Yo: 1 where Xij (Y i ) is the mean biomass for species X (Y) when the ratio of X to Y IS 1 to j. Novak et al. (1993 Environmental Entomology) proposed the alternative measure For each, a value of 1 indicates the two species are equal competitors.Values greater than (less than) 1 indicate species X (Y) is out-competing species Y (X).However, tests to determine whether the measures are significantly different from 1 have not been proposed.The approximate properties of the RCC are given in Rao and Pereira (1968 Sankhya A).Those for the alternative index are derived by extending this work.Based on the results, tests of significance are proposed.The adequacy of these tests is assessed in a Monte Carlo study.
Authors: Ann L. Oberg, Linda J. Young, Leon G. Higley
Institutions: University of Nebraska–Lincoln, Kansas State University
Language: English
Domain: Life Sciences
Open Access status: hybrid
OpenAlex ID: W2588913971