[MORPHMET] Re: The Rohlf Medal: 2015 Call for Nominations

2015-05-31 Thread MORPHMET
A friendly reminder to start getting your nominations packages together. On Monday, March 9, 2015 at 1:24:10 PM UTC+1, MORPHMET wrote: *2015 CALL FOR NOMINATIONS* *The Rohlf Medal* The Rohlf Medal was established in 2006 by the family and friends of F. James Rohlf to mark his 70th

[MORPHMET] Centroid size and isometric scaling

2015-05-31 Thread Blake Dickson
Hey all, So I have a question regarding using centroid size in analyses of scaling. I want to test how something scales with increasing body size in a 3D GM context. If I use centroid size, gained from 3D landmarks, as a measure of the size of my object and skull length as a measure of body

Re: [MORPHMET] Centroid size and isometric scaling

2015-05-31 Thread Emma Sherratt
Dear Blake, In short, isometry, positive allometry and negative allometry cannot be studied using multivariate regressions of multivariate data (such as geometric morphometric coordinate data). These are concepts that only exist in bivariate plots of size and a single variable. Suggested reading