[Oops, found a couple of postings I missed. No excuses. -Moderator (a.k.a. dslice)]
I'm a first year Ph.D student in the Ecology and Evolution Department at Leeds University, England. I'm studying a cline in morphotype in the inter tidal snail Littorina saxatilis which suggests there may be speciation in progress. I am very interested in using geometric morphometrics to quantify the variation in shell shape of the snails, although my knowledge of the field is limited at this stage. I have sampled L.saxatilis from five locations along a vertical transect of the shore. I wish to analyse the cline in morphotype by analysing shell shape variation between the five locations along the transect containing hopefully three morphotypes (H, I and M). I have also sampled from a second transect to replicate the experiment. I have taken the route of landmarks and I am using the software TPS. I plan to use PCA/DFA in an attempt to discriminate between the morphotypes. However, I am unsure whether to use the Partial warp scores matrix, Relative warps score matrix or Weight matrix from the TPSRelw program in the analysis. I would be grateful for any advice. Catherine Sinfield [EMAIL PROTECTED] ________________________________________________________________________ Yahoo! Mail Mobile Take Yahoo! Mail with you! Check email on your mobile phone. -- Replies will be sent to the list. For more information visit http://www.morphometrics.org
