Effect Of Gonadotrophin Releasing Hormone (Gnrh) On Post Partum Ovarian Activity In Nili Ravi Buffaloes
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Publisher: 1995 Dissertation note: Sixteen pluriparus Nili-Ravi buffaloes at 30-35 days postpartum were used. These buffaloes were randomly divided into 2 groups i.e. viz A and B GnRH treated and control group (n=8). A group received single injection of 200jg GnRH and B group served as control. Blood sample were collected on the days 0 (first day of experiment) 4 and 8 of the experiment.
At day 0, 4, 8, 12, 16 and 20 in control and treated groups the average size of follicles were 0.91±0.12 and 1.2±0.28 1.1±0.2 cm, 0.6±0.2 cm and 1.9±0.2, 0.37±0.17cm 1.87±0.3, 1.36±0.27, 1.4±0.24, 1.37±0.22, 1.35±0.24, 1.26±2.0 cm respectively. The average number of follicles in GnRH treated and control buffaloes were 1.5±0.17, 1.62±0.16, 1.5±0.21, 0.62±0.32, 1.5±0.3 and 0.37±0.17, 1.5±0.18, 1.5±0.18, 1.75±0.16, 1.36±0.15, 1.37±0.27, 1.25±0.18 at day 0, 4, 8, 12, 16 and 20 respectively. Two animal from treated group responded to GnRH and showed a rise in serum progesterone concentration 0.81, 3.40, 3.44 and .101, 2.93, 3.00 ng/ml at day 0, 4 and 8 respectively. One animal from control group showed a rise in P4 at day 4 only
In GnRH group animal exhibited oestrus during 76.5±6.31 days of postpartum. In control group animal exhibited oestrus at 89.7±7.32 days of postpartum. From the present study it is concluded that GnRH treatment at 35 days postpartum can initiate cyclic ovarian activity, and GnRH can be used for luteinization of large follicle present on the ovary\ reduction in calving interval and postpartum interval to oestrus.
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Comparison Of Two Methods Of Estrus Synchronization In Sahiwal Cows
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; Literary form:
Publisher: 1995 Dissertation note: A total of 24 Sahiwal cows were selected for this study and randomly divided into two groups viz A and
B. Group A cows were injected two injections of prostaglandin F2 intramuscularly without palpation 11 days apart, while the other group involved the veterinarian skill for detection of palpable corpus luteum and only single injection of prostaglandin was given in all the cows. The cows were artificially inseminated on the basis of standing heat 12 hours after the detection of heat. Estrus detection was made by teasing, behavioural symptoms, physical changes and rectal palpation. 91.66% and 83.33% cows from A and B groups respectively responded to the treatment. This response was slightly greater in cows of group A than group B. Interval to the onset of estrus after treatment was found non-significant (P>O.05) in both group cows. The length of estrus in group A was 21.54±1.65 hours whereas it was 19±0.88 hours in group
B. The difference in the length of estrus among the two groups was statistically non-significant (P>0.05). The conception rate of both groups was found to be 54.54% and 50% respectively, which was slightly higher than the second group. The mucus characteristics of both the groups were noted and 81.81% and 70% cows were found having typical fern like pattern and discharged clear (Transparent) mucus. No one cow having atypical fern pattern and cloudy discharge of mucus conceived. The behavioural signs and the physical changes were recorded. There was little difference in behavioural symptoms and physical changes among the groups. In group B the behavioural symptoms and physical changes were slightly more pronounced as compared to group A. The cost per animal for group A and B was 303 rupees and 276.50 rupees, economically group B technique seems to be profitable to the farmers, and by adopting this technique one can save money.
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