Browsing by Author "VENUGOPAL NAIDU, K(MAJOR)"
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ThesisItem Open Access AUGMENTATION OF FERTILITY IN REPEAT BREEDER CROSS BRED COWS(SRI VENKATESWARA VETERINARY UNIVERSITY TIRUPATI - 517 502. (A.P.) INDIA, 2005-10) KRISHNA KUMAR, R; VENUGOPAL NAIDU, K(MAJOR); MOULIKRISHNA, K; SREENIVASULU, DABSTRACT : The studies on “Augmentation of fertility in repeat breeder cross bred cows” were carried out at Department of Animal Reproduction and Gynaecology, college of veterinary science, Tirupati by utilising 60 repeat breeders cross bred cows and 30 normal breeders cross bred cows. The repeat breeder cross bred cows were subjected to various treatments such as GnRH, hCG, Placentrex, Double insemination on day 0 and compared the efficacy of the treatment groups with the control group. The incidence of repeat breeding was 36.93 per cent among infertility cases examined during the present study. Where as the incidence of repeat breeding was 4.38 per cent in cross bred cows. It was analysed as per the data of Animal Husbandry Department, Chittoor for the years of 1998-99 to 2004-05. The incidence of short, normal and long estrous cycles was 16.66, 56.67 and 26.67 per cent in normal breeders and 20, 51.67 and 28.33 per cent in repeat breeders respectively. The duration of estrus in repeat breeder cows (73.33per cent) was higher than the normal breeders (50per cent). In the present investigation, the cervical discharge of repeat breeder was thick in consistency (65 per cent) than in normal breeder cows (10per cent). The fern pattern of cervical mucus was mostly atypical (60 per cent) in repeat breeder cows when compared to normal breeders cows (20 per cent). The average pH of the cervical mucus of repeat breeder cows (7.68±0.15) was significantly higher than in normal breeder cows (6.95±0.14). Spinnbarkeit (SBK) values of cervical mucus of repeat breeder cows (8.33±0.32 cm) were significantly lower than in normal breeder cows (15.86 ± 0.66 cm). The mean values of haemoglobin, serum calcium, serum phosphorus, alkalinephosphatase activity and acidphosphatase activity were found to be 10.84±0.31gm%/dl, 10.65±0.29mg/dl, 4.74± 0.15mg/dl, 6.02±0.35KAU and 1.87±0.13KAU in normal breeders respectively and 9.55±0.25 gm%/dl, 10.92±0.26 mg/dl, 3.75±0.08 mg/dl, 11.38±0.49 KAU and 2.33±0.24 KAU in repeat breeders respectively. The haemoglobin and the serum inorganic phosphorus levels in repeat breeders were significantly lower than the normal breeders. The serum alkalinephosphatase and acidphosphatase activity were significantly higher in repeat breeders than the normal breeders. However no significant change was noticed in serum calcium levels in both repeat breeders and normal breeders. The conception rates in repeat breeding cross bred cows to first insemination, second insemination and overall were observed to be 50.00, 16.67 and 58.33 percent in GnRH treated group; 58.33, 20.00 and 66.66 percent in hCG treated group; 41.67, 28.57 and 58.33 percent in Placentrex treated group; 33.33, 12.50 and 41.66 percent in Double insemination group and 8.33, 9.10 and 16.67 percent for control groups respectively. Higher conception rate was observed in hCG treated repeat breeder cows. To conclude in the present study, the enhanced conception rates were observed in all the three hormones treated and double inseminated cross bred cows when compared to control.ThesisItem Open Access STUDIES ON THERAPEUTIC MANAGEMENT OF ANESTRUM IN CROSSBRED CATTLE(SRI VENKATESWARA VETERINARY UNIVERSITY TIRUPATI - 517 502. (A.P.) INDIA, 2006-05) KASTHURI, K; VENUGOPAL NAIDU, K(MAJOR); MOULI KRISHNA, K; SRILATHA, Ch.ABSTRACT : Studies on anestrum in cattle with special reference to treatment regimen were undertaken at Veterinary hospitals and villages in and around Tirupati. A total of 624 cattle (335 heifers and 289 cows) with a history of not coming to heat were examined. The incidence of anestrum, cystic ovaries, persistent corpus luteum due to uterine Pathology and pregnancy were found to be 93.11, 1.60, 2.73 and 2.56 per cent, respectively. The anestrus cattle were classified into true anestrum (59.90%) and subestrm (40.10%). The incidence of anestrum was 43.08 per cent among crosssbred cows as per the data of Animal Husbandry Department, Chittoor for the year 1998-99 to 2004-05. The mean values of hemoglobin, serum calcium, serum inorganic phosphorus and serum iron profiles were found to be significantly lower in anestrus cattle than in normal cyclic cattle. Among 96 cattle treated with various treatment protocols, the estrus response was found to be markedly better in PMSG (75.00%) group compared to KI (70.83%), mineral mixture (70.83%) and GnRH (66.66%) groups. Interval between treatment and onset of estrus was noticed to be significantly earlier in PMSG group. However, the duration of estrus was longer in cattle treated with PMSG. The intensity of estrus was observed to be better in PMSG, GnRH and mineral mixture groups than in KI group. The first service conception rate and overall conception rate was higher in PMSG group. Synchronization of estrus in 40 subestrus cows with various treatment protocols revealed that the estrus response was observed to be 100 per cent in double PGF2, GnRH-PGF2-GnRH and CIDR protocols except in single PGF2 (90%) protocol. Interval between treatment and onset of estrus was observed to be significantly shorter in GnRH-PGF2- GnRH treatment group. The duration of estrus was also observed to be significantly shorter in single PGF2. The intensity of estrus was noticed to be better in CIDR, double PGF2 and GnRH-PGF2-GnRH groups compared to single PGF2 group. The first service conception rate and overall conception rate was higher in double PGF2 (40 and 70%, respectively) and GnRH-PGF2-GnRH (40 and 70%, respectively) groups than single PGF2 (33.33 and 66.66%, respectively) and CIDR (30 and 40%, respectively) treatment regimens. It is concluded that treatment of true anestrus cattle with GnRH, PMSG and synchronization of subestrus cows with double PGF2 and GnRH-PGF2-GnRH protocols proved to more effective and can be utilized under field conditions to curtail these two reproductive hazards.