Titre :
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Biplot presentation of diet composition data: an alternative for fish stomach contents analysis
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Auteurs :
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V. De Crespin de billy ;
S. Doledec ;
CEMAGREF AIX EN PROVENCE HYAX ;
D. Chessel ;
UNIVERSITE LYON I CLAUDE BERNARD ;
LABORATOIRE DES HYDROSYSTEMES FLUVIAUX LYON ;
LABORATOIRE DE BIOMETRIE ET DE BIOLOGIE EVOLUTIVE LYON
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Type de document :
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article/chapitre/communication
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Editeur :
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Academic Press, 2000
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ISBN/ISSN/EAN :
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0022.1112
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Format :
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p. 961-973
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Langues:
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= Anglais
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Mots-clés:
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ANALYSE EN COMPOSANTE PRINCIPALE
;
CONTENU STOMACAL
;
REGIME ALIMENTAIRE
;
HABITAT
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Résumé :
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A multivariate analysis derived from principal components analysis (PCA), and which allows the investigation on diet composition data, is introduced. To illustrate the method, prey composition data of stomach contents of brown trout Salmo trutta L. collected in a regulated stream were used. The diet composition, foraging strategies and related patterns of fish diet variation were analysed at a macrohabitat scale (i.e. riffles and glides) by way of biplots. These graphical presentations were consistent with PCA on proportions.
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Source :
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Journal of fish biology, vol. 56, no 4, 2000
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