Table 2.

Levels of significance for the fixed effects used in the analysis of beef bull semen attributes

	Trait
Fixed effect	VOL	CONC	IMot	NSP	PTMot	3HRPTMot	%NORM	PRIM	SEC
n (50,624)	17,026	16,951	17,029	16,951	11,690	3,378	7,672	7,686	7,728
AIC1	85,270.8	23,4998.3	126,589.1	311,531.6	81,398.4	19,649.9	47,311.9	43,643.6	44,657
Collection location	0.7701	<0.0001	0.0016	<0.0001	<0.0001	—	0.9817	0.149	<0.0001
Collection day within year	<0.0001	<0.0001	<0.0001	<0.0001	<0.0001	<0.0001	<0.0001	<0.0001	<0.0001
Age	<0.0001	0.5752	0.0004	<0.0001	0.0184	0.0007	0.0023	0.046	0.0771
Days since previous collection	<0.0001	0.4152	0.0022	<0.0001	0.8981	0.7902	0.3268	0.5217	0.7807
Cum CCI	0.2798	0.217	0.6691	0.4196	0.7352	—	0.8383	0.2431	0.9834

¹AIC, Akaike Information Criterion.