The objective of this study was to compare fixed-time AI pregnancy rate in Angus crossbred beef cows inseminated with frozen-thawed or fresh-extended semen. Two ejaculates from each of two Angus bulls were collected by artificial vagina and pooled for each bull. The pooled semen from each bull was divided into two aliquots; Aliquot 1 was extended using Caprogen (LIC, Hamilton, New Zealand) to a...

This experiment was designed to study the effect cooling rate in Hariana bull spermatozoa during cryopreservation. For this purpose, ejaculates were collected from four Hariana bulls using artificial vagina at biweekly interval. The semen sample which possesses more than 70% progressive motility and above 500 million/ml spermatozoa concentration was subsequently subjected to processing for liqu...

previous studies have indicated that fish oil intake wi1l improve semen quality in some mammals and birds. the aim of this study was to investigate the effect of dietary fish oil on reproductive performance in ram. eight zandi rams were divided into two groups and fed either a control diet or a supplemented diet with fish oil. both of the diets were isocaloric and isonitrogenous and formulated ...

The objective of this experiment was to evaluate the effect of bull exposure on ovarian cyclicity in postpartum Murrah buffaloes. Twentyone buffaloes between the fi rst to fi fth lactation, which had calved during September and early February, were assigned at random to receive one of the following two treatments: (1) exposure to a vasectomized bull (bull exposed, BE) and (2) isolated from bull...

Aim: To assess the status of bovine brucellosis in an organized dairy with a past history of Brucella abortions and where Brucella control measures including test and removal, calf-hood vaccination (already present adult animals were not vaccinated), use of semen obtained from a screened bull and general hygienic measures helps in the control of brucellosis in the farm have been implemented for...

Aim: The experiment was conducted to study the total seminal plasma protein (TSPP) and heparin-binding proteins (HBPs) in relation to initial semen quality of buffalo bull. Materials and Methods: Semen from two Murrah buffalo bulls (bull no. 605 and 790) with mass motility of ≥3+ were used for the study and categorized into three groups (Group IMass motility 3+, Group IIMass motility 4+ and Gro...

Bovine herpesvirus 1 (BoHV-1) and 5 (BoHV-5) are important pathogens of the respiratory and genital tract of cattle and may also affect the central nervous system and cause meningoencephalitis. Both virus types are estimated to be widely distributed in Southern Brazil. In the present study, BoHV-1 and/or BoHV-5 DNA were detected in bovine semen samples from two states of Brazil by two species-s...

The objective of this study was to evaluate effect of different concentrations of catalase in two extenders on motility, viability and lipid peroxidation bull spermatozoa during semen freezing process. Thirty ejaculates collected from ten Holstein bulls were pooled and evaluated at 37 °C. Pool ejaculated was split into two main experimental groups, 1 and 2. In experiment 1, specimen was diluted...