Dear Adeline Yong
Right now you are essentially plotting size (of the claw) against size (of
the crab). What you are interested in is shape against size. I am not sure
what program you are using now, but I would suggest MorphoJ, as it is quite
user friendly. You should do a multivariate
You can also perform this analysis as a multivariate linear model (using
first variable, ln(CS) as independent variable) with PAST. Nervertheless,
number of Procrustes versus number of specimens can be a problem if you
sample size is not large enough.
Pere M.
On Dm, Febrer 18, 2015 09:06,
Hi Everyone,
I am exploring the use of GMM to study the ontogenetic changes of claw
morphology in one species of crabs. The tips of the crab claws changes in
curvature (shape) as they grow and there are distinct differences if I
compare the claws of the juvenile crabs and the adults. However, the
Hi Adeline,
I'm not sure if this helps with your problems, but what you are
describing reminds me of two things:
- MANCOVA using shape variables as dependent, species as categorical
predictor and size (either of the claw or of the body) as covariate
and testing not only for the main