Table 6. Sources of variation, degrees of freedom, and mean square of micronuclei (MCN) number in Astyanax altiparanae, in addition to the MI and AI reported in Allium cepa.

Sources of Variation	Degrees of freedom			Mean square
	MCN	MI	AI	MCN	MI	AI
Colection Periods	3	4	4	13.461***	13.541***	0.033 NS
Colection Points	5	5	5	12.736***	3.352***	0.169NS
Periods * Points	14	19	19	0.820 NS	1.265***	0.119 NS
CV (%)	24.50	20.15	294.59
R2	0.72	0.78	0.25

CV coefficient of variation, MI mitotic index, AI alteration index.

^***P ≤ 0.001,

^NSnot significant (P > 0,5).