Tab. 2. Alimentary Index (AI _i %) of the main plant species consumed by Lithodoras dorsalis in each length class at the Amazon River mouth, Brazil, from July 2010 to June 2011.

Length classes (cm)	Alimentary Index (AI %)
	Euterpe oleracea	Montrichardia linifera	Mauritia flexuosa
<13.6 (n= 123)	1.387	6.146	92.467
13.6 - 19.1 (n= 153)	90.087	2.838	7.075
19.2 - 24.7 (n= 69)	91.960	6.127	1.913
> 24.7 (n= 22)	32.970	66.173	0.857