Oestrous Response and Conception Rate in Malabari Cross-Bred Goats Following Two Different Oestrus Synchronization Protocols

Abstract

| The comparative efficacy of two oestrus synchronization protocols using Ovsynch and progestagen (TRIU -C ® ) was analysed based on the reproductive performance in Malabari cross bred goats. Early onset of oestrus with higher oestrus response was observed in the progestagen group of animals. However, there was no significant difference between the two protocols, on the duration and intensity of oestrus. When diagnosed by ultrasound sonography, the conception rate following the two protocols did not find to vary significantly. Even though, the intensity of oestrus did not vary with the protocols, the intensity was higher (P<0.05) in the conceived group of animals than those failed to conceive. This study suggests that the oestrus intensity has a correlation to the conception rate in goats. Keywords MATERIALS AND METHODS animalS and FeedingA total of 16 healthy Malabari crossbred multiparous goats aged between 3-4 years and body weight around 20-25 kg were selected for the study. The animals were exposed to natural lighting conditions at latitudes between 11°47' N & 15°58' N, where maximum temperature and relative humidity is ranging between 27-29 o C and 78-88 mm/Hg respectively during the breeding season. They were fed with a daily ration of 200 g concentrate mixture per animal (Table 1). In addition, free access to green grass and water was made available. Synchronization ProtocolSThe goats were divided into two groups of eight animals each. Goats belonging to Group I were subjected to oestrus synchronization by using Ovsynch Protocol with first dose of Buserelin injection (0.004mg), GnRH analogue (1ml Receptal ® , Intervet, Holland) on day 0 intramuscularly followed by an intramuscular injection of prostaglandin (12.5 mg) Dinoprost (2.5 ml Lutalyse ® , Pfizer, Belgium) on 7 th day. Forty eight hours after prostaglandin treatment (day 9 th ), a second dose of Buserelin (0.004mg) was again administered intramuscularly. grouP i (ovSynch Protocol)Animals in Group II were subjected to the intra-vaginal placement of progesterone device (TRIU-C ® , Virbac, India) containing 160 mg of natural progesterone along with intramuscular injection of GnRH (Buserelin,0.004 mg) on the first day of the experiment (day 0). The intravaginal device was retained for seven days and at the time of withdrawal (day 7 th ) an intramuscular injection of 12.5 mg of Dinoprost, an analogue of PGF 2α (2.5 ml Lutalyse ® , Pfizer, Belgium) was administered. grouP ii (ProgeStagen-triu-c ® Protocol)Twenty four hours after the prostaglandin treatment the goats in each group were exposed to apronised bucks for 30 minutes for detection of oestrus and its scoring. The Flehmen's reaction shown by the teaser buck was primarily observed and the intensity of oestrus signs in does was determined ( Table 2). The goats were inseminated with fresh semen 72 hours (day 10 th ) after the administration of the prostaglandin injection and re-inseminated twenty four hours after the first insemination (day 11 th ). The does were observed for the onset ...

Comparison of Estrous Performance and Progesterone Level of Kacang Goats Induced by PGF2α Versus Ovsynch Protocol

“…The relatively similar results were also reported by Pujar et al [1] in Indian goats (99.16%) and Holtz et al [10] in Boer goats (100.0%). The slightly different result was reported by Panicker et al [7] which obtained an estrous percentage of 75.0% in Malabari crossbreed goats that were induced with ovsynch protocol. In this study, the Kacang goat showed an unfavorable response to the implementation of estrous synchronization with PGF2α.…”

“…Artificial insemination is carried out 12-16 hours after the second injection of GnRH [5]. The ovsynch protocol has been carried out on Saanen goats [6], Malabari Cross-Bred Goats [7], and Indian goats [1], but no one has used this protocol in Kacang Goat.…”

Prevalence of Subclinical Mastitis in Dairy Goats Caused by Bacterial Species

“…In arid areas where vegetation is scant and is too steep for cultivation, goats roaming more widely than other herbivores and meet their requirements from browsing on weeds neglected by others, they has higher tolerance to feed deficient in crude protein and certain minerals. Goat milk is cheap, wholesome, easily digestible and nutritious (Panicker et al, 2015). It is recommended for use in dyspepsia, peptic ulcer and pyloric stenosis.…”

Occurrence of Anthrax Spores in Small Ruminants Hair/Wool in District Tharparkar, Sindh

“…Likewise, there was a 28.8 million heads of sheep that produced 43.6 thousand tons of wool. Usually small flocks of sheep and goats are raised together in plains and sub hilly areas of Pakistan (GoP, 2013-14;Panicker et al, 2015).…”