Damien Esquerre Gheur <damien.esque...@anu.edu.au> wrote: > Dear morphometricians, > > > I have a pretty big dataset of specimens for most species of pythons > encompassing most of the size range for every species. I have been > projecting the allometric trajectories and doing pairwise slope comparisons > and things like that in Geomorph. However, it seems very obvious that the > is a very strong phylogenetic signal in the data, as species within the > same clade tend to have parallel trajectories. > ...
> Would there be a way, for example, to extract a value for the slope and do > an ancestral state reconstruction on that? Also, is there a way to > incorporate phylogeny in slope comparison models? > I don't know which package of morphometric programs you should use for that, but in phylogenetic comparative methods, you can use your tree of N species and obtain N-1 phylogenetic contrasts from your data. Those can then be treated as independent data points, each of which has your full set of coordinates. You could obtain a Generalized Procrustes superposition of your forms, without resizing the specimens, then feed the resulting coordinates for each species into one of the phylogenetic comparative methods packages. Joe ---- Joe Felsenstein j...@gs.washington.edu Department of Genome Sciences and Department of Biology, University of Washington, Box 355065, Seattle, WA 98195-5065 USA -- MORPHMET may be accessed via its webpage at http://www.morphometrics.org --- You received this message because you are subscribed to the Google Groups "MORPHMET" group. To unsubscribe from this group and stop receiving emails from it, send an email to morphmet+unsubscr...@morphometrics.org.
