Useful, though sometimes technical, information, critiques, and expositions on the traditional use of ratios in morphometric analysis can be found in:
Bookstein, F. L. 1991. Morphometric Tools for Landmark Data: Geometry and Biology. (The Orange Book) and Bookstein, F. L., Chernoff, B., Elder, R. Humphries, J., Smith, G., and Strauss, R. 1982. Morphometrics in Evolutionary Biology. The Geometry of Size and Shape Change, with Examples from Fishes. (The Red Book) Information on general multivariate methods can be found in a number of places, my favorites are: Krzanowski, W. J. 1996. Principles of Multivariate Analysis. A User's Perspective. - Readable, conversational text distinquished from technical details by font. Carroll, J. D. and Green, P. E. 1997. Mathematical Tools for Applied Multivariate Analysis - an excellant exposition of the geometry of multivariate analysis. And good summaries have been provided by our late friend in: Marcus, L. F. 1990. Traditional morphometrics. In Rohlf and Bookstein (eds.) Proceedings of the Michigan morphometrics workshop. (The Blue Book). Marcus, L. F. 1993. Some aspects of multivariate statistics for morphometrics. In Marcus, Bell, and Garci'a-Valdecasas (eds) Contributions to Morphometrics. (The Black Book) -ds -- Dennis E. Slice, Ph.D. Department of Biomedical Engineering Division of Radiologic Sciences Wake Forest University School of Medicine Winston-Salem, North Carolina, USA 27157-1022 Phone: 336-716-5384 Fax: 336-716-2870 == Replies will be sent to list. For more information see http://life.bio.sunysb.edu/morph/morphmet.html.
