Table 2. Pearson correlation between sperm qualitative parameters and metabolites identified in turkey fresh semen, at 32, 44 and 56 weeks of male age.

Metabolite	Sperm variables
	Concentration	Mobility	Viability	Osmotic tolerance
Asp		-0.678**		-0.724**
Glu				-0.663*
Gly				-0.674*
Ile	0.753**
Leu	0.807**
Phe	0.844*
Tyr	0.786**
Val	0.809**
Citrate				-0.603*
Formate				-0.635*
AMP				-0.598*
Carnitine		-0.611*
Creatine		-0.601*		-0.602*
Glucose		-0.540*		-0.690**
Lactate		-0.689**		-0.802**
Myo-inositol		-0.553*		-0.736**
DUFA	-0.907**
PUFA	0.903**
Smn			0.676*

Pearson correlation coefficients were calculated for the sperm qualitative parameters (Fig 1) versus metabolites detected by NMR (Table 1).

Only significant correlation values

* at the 0.05 level

** at the 0.01 level are reported.

Abbreviations—Ac-carnitine: acetylcarnitine; AMP: adenosine monophosphate; DUFA: diunsaturated fatty acids.