Fertility of frozen-thawed bull sperm is reduced by cryopreservation. Freezing-thawing procedures can result in as much as a sevenfold fertility decrease. Sperm mortality and loss of motility do not fully explain the reduced fertility of cryopreserved semen; they may be partially explained by the loss of sperm surface proteins, which are necessary for fertilization. We have previously identifie...

Polyandrous females are expected to discriminate among males through postcopulatory cryptic mate choice. Yet, there is surprisingly little unequivocal evidence for female-mediated cryptic sperm choice. In species in which nuptial gifts facilitate mating, females may gain indirect benefits through preferential storage of sperm from gift-giving males if the gift signals male quality. We tested th...

This study investigated the potential effects of egg quality indices at 95% confidence level in order to minimize quality loss during different storage conditions. The chicken and quail eggs’ quality indices including weight, albumen index, yolk index, Haugh index in fresh eggs as well as after storing in moist sawdust, oil, and refrigerator were measured for six weeks. The results revealed tha...

The relationship between protein changes and egg quality during storage is a critical area of investigation in both basic science product preservation. Viscosity albumen are sensitive sign the deterioration process. Ovomucin, which present albumen, plays an important role gelation albumen. Egg freshness indices ovomucin concentration will alter response to time. This paper analyzed correlation ...

The aim of the present experiment was to investigate how different types of dietary fats and levels of vitamin E affect the fatty acid profile of egg yolk during refrigerated storage of table eggs. ISA Brown hens (n=90; 28 weeks old) were randomly assigned to five experimental diets. The dietary treatments included: (1) control diet without fat supplementation and added vitamin E (2) 5% Alifet ...