Table 2.

Pearson correlations between sperm qualitative parameters and metabolites identified in fresh and frozen–thawed sperm of turkey males at 32 weeks of age.

Metabolite	Sperm Variables
	Mobility	Viability	Osmotic Tolerance
Ala	0.867 **	0.930 **	0.902 **
Gly	−0.770 **	−0.771	−0.802 **
Ile	0.818 **	0.861 **	0.908 **
Leu	0.915 **	0.942 **	0.962 **
Phe	0.683 *	0.784 **	0.781 **
Tyr	0.915 **	0.969 **	0.972 **
Val	0.871 **	0.937 **	0.947 **
Citrate	−0.874 **	−0.833 **	−0.815 **
Formate	0.764 *	0.854 **	0.811 **
Fumarate	−0.723 *		−0.659 *
Lactate	0.806 **	0.887 **	0.830 **
Ac-carnitine	−0.740 *	−0.695 *	−0.689 *
AMP	0.653 *	0.728 *	0.708 *
Carnitine	0.923 **	0.925 **	0.957 **
Creatine		0.673 *	0.697 *
CHO	0.907 *	0.884 *	0.876 *
SFA	−0.865 *		−0.868 *
UFA	0.865 *		0.868 *
PC	0.969 **	0.882 *	0.884 *
PE	0.851 *	0.870 *

Pearson correlation coefficients were calculated for the sperm qualitative parameters (Figure 1) versus metabolites detected by NMR (Table 1). Only significant correlation values * at the 0.05 level and ** at the 0.01 level are reported. Abbreviations:Ac-carnitine: acylcarnitine; AMP: adenosine monophosphate; CHO: cholesterol; SFA: total content of saturated fatty acids; UFA: total content of unsaturated fatty acids; PC: phosphatidylcholine; PE: phosphatidylethanolamine.