The aim of the study was to monitor the follicular dynamics of the natural estrous cycle in the domestic buffalo in Colombia. Patterns of growth and regression of ovarian follicles in two consecutive oestrus cycles in 11 buffalos were evaluated. Ultrasound examination of the ovaries were conducted every second day to establish patterns of follicular waves, number of waves, emergency day, number of follicles recruited, and characteristics of the dominant follicle (DF) and of the corpus luteum (CL). Progesterone (P4) concentration was determined by radioimmunoassay. Seventeen normal cycles (2, 11 and 4 estrous cycles with one, two and three follicular waves, respectively) were evaluated. The inter ovulatory interval was 12.5 ± 2.7, 20.5 ± 1.2 and 28.8 ± 1.9 days for cycles with 1, 2 and 3 follicular waves, respectively. Follicular waves emerged on days 0 ± 2.3 for cycles with 1 wave, o...

The aim of the study was to monitor the follicular dynamics of the natural estrous cycle in the domestic buffalo in Colombia. Patterns of growth and regression of ovarian follicles in two consecutive oestrus cycles in 11 buffalos were evaluated. Ultrasound examination of the ovaries were conducted every second day to establish patterns of follicular waves, number of waves, emergency day, number of follicles recruited, and characteristics of the dominant follicle (DF) and of the corpus luteum (CL). Progesterone (P4) concentration was determined by radioimmunoassay. Seventeen normal cycles (2, 11 and 4 estrous cycles with one, two and three follicular waves, respectively) were evaluated. The inter ovulatory interval was 12.5 ± 2.7, 20.5 ± 1.2 and 28.8 ± 1.9 days for cycles with 1, 2 and 3 follicular waves, respectively. Follicular waves emerged on days 0 ± 2.3 for cycles with 1 wave, o...

The aim of the study was to evaluate the transport of steers by behavioral and physiological indicators and its relationship with high pH of the beef at 24 h after slaughter. A total of 56 Zebu steers (2.5 ± 0.2 years old, 429.9 ± 29.3 kg) were evaluated in four trips to the slaughterhouse under similar conditions (route, truck, and driver), where behavioral indicators (affiliative and agonistic interactions, body postures, body direction in the truck and exploration), stress physiological indicators, and beef pH24 were evaluated. No significant differences were observed in the behavioral variables and the muscle pH24 according to the compartments of the truck. The affiliative interactions were more frequent than the agonistic. Hematocrit and cortisol, glucose and creatine kinase blood concentrations showed high values. The 63.5% (n=36) of the carcasses presented pH24 >5.8. These re...

The aim of the study was to evaluate the transport of steers by behavioral and physiological indicators and its relationship with high pH of the beef at 24 h after slaughter. A total of 56 Zebu steers (2.5 ± 0.2 years old, 429.9 ± 29.3 kg) were evaluated in four trips to the slaughterhouse under similar conditions (route, truck, and driver), where behavioral indicators (affiliative and agonistic interactions, body postures, body direction in the truck and exploration), stress physiological indicators, and beef pH24 were evaluated. No significant differences were observed in the behavioral variables and the muscle pH24 according to the compartments of the truck. The affiliative interactions were more frequent than the agonistic. Hematocrit and cortisol, glucose and creatine kinase blood concentrations showed high values. The 63.5% (n=36) of the carcasses presented pH24 >5.8. These re...