Table 2. Average values of shape indexes.

	Offered	SD	Uningested	SD	Gizzard	SD	Feces	SD
	Circularity
H-lM	0.734	0.060	0.749	0.057	0.789	0.045	0.773	0.045
H-M	0.734	0.060	0.746	0.055	0.798	0.045	0.783	0.045
nH-lM	0.734	0.060	0.747	0.058	0.776	0.049	0.774	0.049
nH-M	0.734	0.060	0.752	0.054	0.780	0.051	0.777	0.051
	Roundness
H-lM	0.732	0.121	0.742	0.121	0.762	0.108	0.760	0.119
H-M	0.732	0.121	0.740	0.119	0.764	0.107	0.763	0.099
nH-lM	0.732	0.121	0.738	0.122	0.745	0.113	0.762	0.116
nH-M	0.732	0.121	0.741	0.116	0.752	0.110	0.753	0.113
	Solidity
H-lM	0.950	0.021	0.954	0.021	0.961	0.016	0.947	0.020
H-M	0.950	0.021	0.953	0.020	0.964	0.015	0.953	0.016
nH-lM	0.950	0.021	0.954	0.021	0.959	0.016	0.953	0.016
nH-M	0.950	0.021	0.955	0.019	0.954	0.017	0.951	0.017

Note:

H-lM, herbivorous diet with a less-muscular gizzard; H-M, herbivorous diet with a muscular gizzard; nH-lM, non-herbivorous diet with a less-muscular gizzard; nH-M, non-herbivorous diet with a muscular gizzard.