Retained placenta in an imported friesian herd under Egyptian conditions

The present study was carried out on 342 imported Friesian cattle to investigate the problem of placental retention with emphasis on some reproductive performance and blood constituents. Blood samples were collected from cows which retained their foetal membranes for more than 24 hours after birth as well as normal parturient cows. Results indicated that retained placenta occurred in 16.72% of cases, predominate in primipara [34.10%] and during the hot season of the year [55.55%]. Significant decrease in plasma magnesium [P < 0.01]; Inorg. phosphorus and iron levels [P < 0.05] and increase in plasma progesterone values were detected in cases with retained placenta as compared to normal parturient cows. Moreover, the retained placenta causes delayed first post partum heat, calving interval with a reduction in fertility and a decrease in milk yiels

Ovarian activity of barki ewes in relation to plane of nutrition

The present investigation aimed to improve the ovarian activity of Barki breed by means of nutritional management. Three groups of Barki ewes were fed on maintenance ration, maintenance besides nitrogenous supplement and maintenance besides carbonesious supplement. The results revealed significant increases in live body weight and daily gain in supplemented groups than in maintenance one. In the same time, the estrous cycles were superior with regular rhythm in both supplemented groups. Plasma progesterone concentrations showed significant higher figures in ewes fed maintenance than in supplemented ewes

Gestation and lambing of barki ewes in relation to plane of nutrition

The present investigation aimed to improve the reproductive and productive efficiency of Barki ewes managed under different planes of nutrition. The experiment was carried out on 3 groups of Barki ewes fed on maintenance ration, maintenance beside nitrogenous supplement and maintenance beside carbonesious supplement for 3 months premating. The results revealed that the level of supplementation had a non significant effect on both the gestation length and the sex of the off spring. On the contrary, progesterone concentration showed significant decrease in the supplemented 2 groups [2.36 +/- 0.95 and 2.59 +/- 0.76 ng/ml]. Lambing rates averaged 90, 100 and 100% in the 3 groups, respectively, without twinning. Sex ratio of newly born averaged 1.5, 0.67 and 0.67, respectively, and lamb birth weight was significantly heavier in nitrogenous supplemented ewes [3.50 +/- 10.17 kg] than in carbonesious supplemented ones [3.20 +/- 0.17 kg] or in control group [2.95 +/- 0.21 kg]

Effect of plane of nutrition on reproductive performance in barki ewes 2gestation and lambing

The experiment was carried out on three groups of Barky ewes fed on maintenance ration. Additional supplement was offered three months premating. The first group was supplemented by high protein supplement [36.6% total protein and 2.4 Mcal/kg digestible energy]. The second group was supplemented by low protein level [11.9% total protein and 3% Mcal/kg digestible energy], and the 3rd group was kept on maintenance ration and used as control. The results revealed that the level of supplementation had a nonsignificant effect on both gestation length and the sex of the offspring. On the contrary, progesterone concentration showed significant [P <0.05] decrease in the two supplemented groups. Lambing rates averaged 100, 90 and 100% in the 3 groups, respectively, without twining. Sex ratio of newly born averaged 1.5, 0.67 and 0.67, respectively, and lamb birth weight was significantly [P <0.01] heavier in ewes supplemented with high protein level than in either those supplemented with low protein level or in the control group. It is recommended to keep Barky ewes at the premating period on high level protein supplement to improve health condition which reflected on the crop

Postnatal development of hypothesis adrenal and thyroid glands in male buffaloes

The postnatal growth and development of the hypophysis, adrenal and thyroid glands in36 buffalo buil-calves were studied from first to twelfth month of age. The growth of the hypophysis and adrenal glands was characterized by slow weight increase till 8 months of age and more rapid between 8 and 12 months. Growth of the thyroid gland was rapid up to 4 months and slowed thereafter. The small increase in weight gain between 1 and 12 months of age suggested considerable prenatal growth of the studied endocrine glands. Differences in weights of the right and left adrenal and thyroid were detected with tendency of the left side being heavier and bigger than the right one. The changes in the dimensions of the studied glands and its effect on the shape were also considered

Some reproductive traits of buffalo bulls under desert conditions of Egypt

The present study was carried out under the desert conditions of Wadi-El-Natroun Animal Production Station where 7 bulls were used for a period of 4 years. The following points were investigated. 1. Seasonal variations in the libido and semen characters. 2. Variation in the libido and semen characters due to age. The libido and semen characters were found higher during autumn and from buffalo bulls aged 4-6 years

Postnatal growth of male accessory genitalia in water-buffalo with special reference to puberty

The postnatal growth and development of the excurrent ducts epididymis and ductus deferens], accessory glands vesicular and prostate glands], pelvic urethra and penis of buffalo-bull had been studied in 36 male calves. Monthly three animals were slaughtered from first to twelfth month of age and their genital organs were collected. From the postnatal growth rates of the different genital organs studied it was evident that the period of maximum growth varied between 40 and 48 weeks of ages. Several evidences has been established indicating attainment of puberty in buffalo-bull by age 10 to 12 months. The postnatal development of the penis of the buffalo-bull was studied and results indicated that its size was less than the size of the bull penis and the reverse was true concerning the size of the glans penis. Glans penis freedom from penile prepuce commenced at 8 to 10 months of age and completed by 12 months age