Multivariate Morphological Variation in Channel Catfish from Three Louisiana Lakes
Channel catfish (lctalurus punctatus) were obtained from 3 lakes in southeastern Louisiana during the fall of 1986. A truss network of morphological measurements was developed, resulting in 10 variables measured on each individual fish. Morphological variables were adjusted to remove the effect of standard length through least-squares regression. Multivariate analysis of variance of adjusted variables yielded significant (P < 0.01) differences among lakes. Factor analysis of the partial correlation matrix of adjusted variables yielded 4 non-orthogonal dimensions descriptive of body...
