Effects of different extenders and additives on liquid storage of Awassi ram semen

Authors : Ömer VARIŞLI, Abdullah TAŞKIN, Numan AKYOL

Pages : 230-242

View : 20 | Download : 9

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :  The aim of this study was to evaluate the effects of different extenders and additives on ram semen during liquid storage and to demonstrate the role of oxidative stress parameters on this process. In the present study, ejaculates taken by artificial vagina twice a week from 4 rams during the breeding season were used. They were mixed and used if motility and viability were above 70% and there was a 95% intact acrosome. The semen specimens were diluted by Tris-citrate-glucose insert ignore into journalissuearticles values(TRIS);, Tris-TES insert ignore into journalissuearticles values(TEST);, HEPES-buffered Tyrode lactate insert ignore into journalissuearticles values(TL-HEPES);, and Dulbecco?s phosphate-buffered saline insert ignore into journalissuearticles values(PBS); extenders supplemented with different additives [centrifuged egg yolk, Equex-STM, bovine serum albumin insert ignore into journalissuearticles values(BSA);, and ethylenediaminetetraacetic acid insert ignore into journalissuearticles values(EDTA);]. The specimens were stored at 4 °C for up to 96 h and evaluated for motility, membrane integrity, acrosome integrity, mitochondrial membrane potential insert ignore into journalissuearticles values(MMP);, and oxidative stress parameters. At the end of the 96-h storage, the highest sperm motility was 64.2 ± 3.7% insert ignore into journalissuearticles values(P < 0.05); and significant loss of sperm motility and membrane integrity were not detected in extender TEST-3, but the MMP rate significantly declined. Acrosome integrity was not affected by storage time or extender types. BSA and EDTA decreased lipid peroxidation insert ignore into journalissuearticles values(LPO); and total oxidant status insert ignore into journalissuearticles values(TOS);, but did not positively affect motility or membrane integrity. As a result, TRIS, TEST, and TL-HEPES-3 were observed to provide better protection for ram semen during liquid storage at 4 °C than other extenders. The role of oxidative stress and MMP are considerable in liquid storage.
Keywords : Awassi ram, extenders, liquid storage, supplements, sperm