A comparison of two methods of oestrous synchronisation of hair sheep in the tropics

Godfrey, R. W.; Gray, M L; Collins, Jeffrey R.

doi:10.1016/s0378-4320(97)00007-9

Cited by 54 publications

(29 citation statements)

References 17 publications

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“…The oestrus response in group II (Progestagen-TRIU-C ® ) was 100 percent (Table 3 and 4). The results obtained in the present study were in agreement with the results obtained by Romano (2004) and Godfrey et al (1997) with different protocols of progestagens. Therefore, these studies suggest that the progestagen (TRIU-C) is more effective than the standard Ovsynch and prostaglandin regimen for the oestrus induction in the goats of tropical region.…”

Section: Resultssupporting

confidence: 92%

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

Panicker¹

2015

J. Anim. Health Prod.

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| 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 ...

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Section: Resultssupporting

confidence: 92%

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

Panicker¹

2015

J. Anim. Health Prod.

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“…Além disso, a SEO proporciona manejo do rebanho em blocos, concepção nas fêmeas fora da estação reprodutiva, melhor prolificidade, antecipação da puberdade, redução do número de serviços por concepção (Machado et al, 1996) e, por fim, agrupa as inseminações artificiais (IA) ou coberturas em um determinado espaço de tempo, concentrando os partos em um mesmo período (Ferraz, 1991;Godfrey et al,1997).…”

Section: Introductionunclassified

Efeito de diferentes dispositivos intravaginais na sincronização estral e taxa de gestação em ovelhas deslanadas submetidas à IATF via cervical superficial com sêmen refrigerado

Padilha

Magalhães

Maia-Junior

et al. 2011

Agraria

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Efeito de diferentes dispositivos intravaginais na sincronização estral e taxa de gestação em ovelhas deslanadas submetidas à IATF via cervical superficial com sêmen refrigerado RESUMO O objetivo neste estudo foi avaliar o efeito de diferentes dispositivos intravaginais na sincronização estral e taxa de gestação em ovelhas deslanadas submetidas à IATF via cervical superficial com sêmen refrigerado. Foram utilizadas 40 ovelhas SPRD, distribuídas aleatoriamente em dois grupos: Grupo 1, ovelhas com o dispositivo CIDR®; Grupo 2, ovelhas tratadas com esponjas impregnadas com 60 mg de acetato de medroxiprogesterona (MAP). Os animais receberam o tratamento por 14 dias, sendo a IATF, via cervical superficial, realizada 55 h após a retirada dos dispositivos. A IATF foi realizada utilizando-se sêmen resfriado de carneiros com fertilidade comprovada. O intervalo médio do fim do tratamento ao início do estro foi de 29±0,59 h para o grupo tratado com CIDR ® e 34±2,7 h para o grupo com MAP, mostrando uma antecipação significativa (P<0,05) no início do estro dos animais tratados com CIDR ® , quando comparados àqueles com MAP. A taxa de gestação do grupo tratado com esponjas impregnadas com MAP apresentou taxa significativamente superior àquele tratado com CIDR ® (80% versus 25%) e a prolificidade foi de 1,8 e 1,6 para os grupos tratados com MAP e CIDR ® , respectivamente. Como o elevado número de animais em estro no grupo tratado com CIDR ® não se refletiu em perfeita sincronia, resultando em baixa taxa de gestação, recomenda-se, para a inseminação de ovelhas deslanadas, 55 h após a retirada do dispositivo intravaginal, a utilização de esponjas impregnadas com MAP. Palavras-chave: Hormônios, pequenos ruminantes, sincronização do estroEffect of different intravaginal devices in estrus synchronization and pregnancy rate in woolless sheep submitted to FTAI via superficial cervical with fresh chilled semen ABSTRACTThe aim of this study was to evaluate the effect of different intravaginal devices in estrus synchronization and pregnancy rate in woolless sheep submitted to FTAI via superficial cervical with fresh chilled semen. Forty crossbreed ewes were used and randomly distributed into two groups: Group 1, ewes treated with the device CIDR®; Group 2, ewes treated with sponges impregnated with 60 mg of medroxyprogesterone acetate (MAP). The devices remained in the animals for 14 days and the TFAI via superficial cervical was performed 55 h after the devices were removed. The TFAI was performed using fresh chilled semen from rams with proven fertility. The average interval between the end of treatment and the onset of estrus was 29±0.59 h (CIDR®) and 34±2.7 h (MAP), showing a significant anticipation (P<0.05) at the onset of the estrus in animals treated with CIDR®, in comparison to MAP. The pregnancy rate and prolificity was 80% and 1.8 in the group of sheep treated with sponges with MAP and 25% and 1.6 for the CIDR®. Once the high number of animals in estrus in the CIDR® group did not result in perfect synchronization, resulting i...

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“…a (PGF2 a ) and its analogues have been used in oestrous synchronisation in heifers (Zarkawi et al 1991), cows (Peters 1989), and, to a lesser extent, in does (Nuti et al 1992) and ewes (Godfrey et al 1997). Prostaglandins have been also used at different intervals (Tekeli et al 1997) to improve production and reproduction efficiencies.…”

Section: Introductionmentioning

confidence: 99%

The evaluation of two closes of prostaglandin F_2αanalogue, Prosolvin, for oestrous synchronisation of Syrian Awassi ewes

Zarkawi

2000

New Zealand Journal of Agricultural Research

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An assessment was made of the effectiveness of two doses of Prosolvin, a synthetic prostaglandin F2 a , on oestrous synchronisation in local ewes during the breeding season. Thirty cycling Awassi ewes were divided equally into three groups. Ewes in group T10 and group T15 were injected intramuscularly twice with either 10 tng (T10) or 15 mg (T15) of Prosolvin, with an interval of 11 days. The third group received no treatment and served as a control group (C). Oestrus commenced in the ewes in group T10 at 83.3±42.9 hours, and in the ewes in the T15 group at 136.5 ± 109.9 hours, after the second injection of Prosolvin. In the control group (C), oestrus behaviour was more variable and commenced 251.2 ± 130.9 hours after introduction of the rams. In the time to onset of oestrus, the difference between the effects of the two doses was not significant (P > 0.05) but there was a significant difference (P < 0.05) between treated and untreated ewes. The mean serum progesterone level dropped sharply within 24 hours after the treatment, from 8.48 nmol I -1 to 0.52 nmol 1 -1 in the ewes in group T10, and from 7.95 nmol I -1 to 0.45 nmol I -1 in the group T15. The treatment had no effect on either the duration of pregnancy or birth weight. It could be concluded that it is possible to use the synthetic prostaglandin Prosolvin at doses of 10 or 15 mg for oestrous synchronisation in local Awassi ewes during the breeding season.

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A comparison of two methods of oestrous synchronisation of hair sheep in the tropics

Cited by 54 publications

References 17 publications

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

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

Efeito de diferentes dispositivos intravaginais na sincronização estral e taxa de gestação em ovelhas deslanadas submetidas à IATF via cervical superficial com sêmen refrigerado

The evaluation of two closes of prostaglandin F_2αanalogue, Prosolvin, for oestrous synchronisation of Syrian Awassi ewes

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A comparison of two methods of oestrous synchronisation of hair sheep in the tropics

Cited by 54 publications

References 17 publications

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

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

Efeito de diferentes dispositivos intravaginais na sincronização estral e taxa de gestação em ovelhas deslanadas submetidas à IATF via cervical superficial com sêmen refrigerado

The evaluation of two closes of prostaglandin F2αanalogue, Prosolvin, for oestrous synchronisation of Syrian Awassi ewes

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The evaluation of two closes of prostaglandin F_2αanalogue, Prosolvin, for oestrous synchronisation of Syrian Awassi ewes