To achieving high efficiency in sheep, ram sperm must have fertilization ability. Quercetin, a potent antioxidant, has been shown to positive effect on semen different species. This study aims improve the of Merino using quercetin. The ejaculates collected from rams were used for dilution (sperm density ≥ 3×109 spermatozoa/ml, motility 75%). Tris diluent was dilute semen. divided into 4 equal v...

The gonadal hormone inhibin regulates daily sperm production (DSP) indirectly through negative feedback control of FSH secretion and may also affect DSP via direct actions within the testis. Studies attempting to increase DSP through the immunization against inhibin have yielded equivocal results. The current study compared 2 inhibin antigens for effects on DSP and hormone secretion. Hampshire ...

BACKGROUND Adiponectin and its receptors (AdipoR1 and AdipoR2), known as adiponectin system, have some proven roles in the fat and glucose metabolisms. Several studies have shown that adiponectin can be considered as a candidate in linking metabolism to testicular function. In this regard, we evaluated the correlation between sperm mRNA abundance of adiponectin and its receptors, with sperm mot...

N. Matthews, N. Bester, and L.M. J. Schwalbach Department of Animal-Wildlife-and Grassland Sciences, University of the Free State, P.O.Box 339, Bloemfontein, 9300 _______________________________________________________________________________________ Abstract This aim of this study was to compare the quality of ram semen samples collected by means of artificial vagina and by electro-ejaculation...

A steady-state fluorescence polarization technique, using the membrane probe 1,6-diphenyl-1,3,5-hexatriene (DPH), showed that separately detectable transitions occurred in the regions of 17, 26 and 36 degrees C in isolated preparations of ram sperm plasma membrane. An independent technique based on the temperature-related behaviour of calcium- and magnesium-activated ATPase detected a single ph...