Quadratic Discriminant Analysis with Covariance for Stock Delineation and Population Differentiation: A Study of Beaked Redfishes ( Sebastes mentella and S . fasciatus )

• Published in: Canadian Journal of Fisheries and Aquatic Sciences
• Main Author: Misra, R. K.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Canadian Science Publishing 1985
• Subjects: Aquatic Science; Ecology, Evolution, Behavior and Systematics; Sebastes mentella
• Online Access: http://dx.doi.org/10.1139/f85-209; http://www.nrcresearchpress.com/doi/pdf/10.1139/f85-209

Stock delineation is of vital importance in fisheries management programs. Linear discriminant function (LDF) has been employed extensively in population differentiation studies but is of severely restricted usefulness when populations differ in their dispersion matrices. Quadratic discriminant function (QDF) is the appropriate analysis to employ in these situations. Here, I analyzed morphometric data of beaked redfishes (Sebastes mentella and S. fasciatus) by a recently developed conditional QDF.