Multivariate analysis for proportional data

I have a data set owing some response variables with proportional values
and independent variables of mixed effect. How it is possible performing a
multivariate analysis of this type once the MCMCglmm package doesn't allow
for binomial family?

Mayara,

   If your data are proportions you should look carefully at compositional
data analysis (CoDA). There are seveal R packages for this, including
'compositions', 'robCompositions' (robust compositions), and
'zCompositions'. For documention and lerning there are the 'Lecture Notes on
Compositoinsl Data Anayis' by Pawlowsky-Glahn, V., Egozcue, J. J., and
Tolosana-Delgado, R. (available as a PDF but I don't recall the URL
off-hand); 'Analyzing Compositional Data with R' by van den Boogaart, K.G.
and Tolosana-Delgado, R.; and 'A Concise Guide to Compositional Data
Analysis' by John Aitchison, also available as a PDF.

Happy learning,

Rich