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2005 - Chemometric Discrimination among (Selected)Wild & Cultured (Fish)

Journal of Agricultural Food and Chemistry. 2005, 53, 5304-5312

KAY L. TRITT, CHRISTOPHER J. O’BARA, AND MARTHA J. M. WELLS

Center for the Management, Utilization, and Protection of Water Resources, and the Departments of Biology and Chemistry, Tennessee Technological University, Post Office Box 5033, Cookeville, Tennessee 38505

The potential to distinguish juvenile wild from cultured fishes and to discriminate among juvenile fishes by species based on fatty acid composition was demonstrated. Statistical approaches to data evaluation included analysis of variance, correlation analysis, principal component analysis (PCA), and quadratic discriminant analysis (QDA). Differences were determined between wild and cultured fishes both within and between species and between hatcheries. Fatty acid compositions were compared among individual (not composited) specimens of wild and cultured, age-0, freshwater species: largemouth bass Micropterus salmoides, black crappies Pomoxis nigromaculatus, white crappies P. annularis, and black-nose crappies. Four fatty acids were investigated: linoleic acid (18:2n-6), linolenic acid (18:3n-3), arachidonic acid (20:4n-6), and docosahexaenoic acid (22:6n-3). Linoleic acid was the primary fatty acid used to differentiate juvenile wild from cultured fishes.

 

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