Morphometricians, I'm looking for shape differences between two groups of fish. My plan was to do a MANOVA of partial warp scores, and then canonical variate analysis to explore the shape differences. I have just learned, however, that my groups of fish differ in size (about 0.5 SD), so now am wondering how to evaluate how much of the shape difference I see (and based on preliminary analysis, it is enough to classify fish by CVA with about 95% accuracy) is actually due to size differences. I realize this may be an elementary question, but what's the best way to get at this problem? The guidance I have so far says that multivariate regression of partial warps on centroid is the best way to begin.
Thanks Craig Busack Washington Department fo Fish and Wildlife
