Read this... It has some real good info regarding the feeding of seeds/fruits/nuts (including what kind was used in the experiment).
It doesn't have the Manuelli listed, but I'm sure the same would apply with a Manny as the species listed. I'm sure this will help you and get you in the right direction
Edit: The site linked is
not my site. The site linked is for educational purposes only, in response to the question at hand. Please be sure to give the originator of the site linked proper credit for his work (Frank aka. Hastatus)...
BTW - If you have no idea what I'm talking about, just ignore my edit... Otherwise, I'm sure you'll see the intended humor.