Table 2.

Mean observed and simulated Pianka indices and their respective p values for the dietary overlap of S. gibbus and S. rhombeus in the Coaracy Nunes reservoir in Ferreira Gomes, Amapá (Brazil).

Parameter	Seasonal	Nycthemeral
		Flood	Dry
(Ojk): observed mean	0.997	0.531	0.519
(Ojk): simulated mean	0.241	0.606	0.606
Variance of the simulated indices	0.083	0.001	0.002
C score: p (observed ≤ expected)	1.000	0.018∗	0.016∗
C score: p (observed ≥ expected)	0.000∗	0.982	0.984

^∗ p < 0.05.