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Detrended Correspondence Analysis of Dietary Data
Author(s) -
Graham John H.,
Vrijenhoek Robert C.
Publication year - 1988
Publication title -
transactions of the american fisheries society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.696
H-Index - 86
eISSN - 1548-8659
pISSN - 0002-8487
DOI - 10.1577/1548-8659(1988)117<0029:dcaodd>2.3.co;2
Subject(s) - principal component analysis , detrended correspondence analysis , correspondence analysis , multiple correspondence analysis , predation , discriminant function analysis , statistics , linear discriminant analysis , detrended fluctuation analysis , multivariate statistics , biology , ecology , mathematics , ordination , geometry , scaling
Niche relationships of fishes can be inferred from dietary analysis. Individual fish and their prey can be ordered along an underlying continuum that has ecological relevance, The specific arrangement is a function of the predatorˈs behavior and the preyˈs spatial distribution. This distribution of prey eaten by predators conforms to the underlying assumptions of detrended correspondence analysis. This multivariate technique, designed specifically for discrete data, uncovers underlying resource gradients in the dietary data. We used it to analyse dietary information collected from banded sunfish Enneacanthus obesus and bluespotted sunfish Enneacanthus gloriosus and compared then the results with analyses by discriminant analysis, factor analysis, and principal component analysis. Detrended correspondence analysis was as effective in discriminating among species on the basis of diet as discriminant analysis, and was much better than either factor analysis or principal component analysis in producing a small number of interpretable resource axes.