New estrus synchronization and artificial insemination protocol for goats based on male exposure, progesterone and cloprostenol during the non-breeding season

López-Sebastián, A.; González-Bulnes, Antonio; Carrizosa, J.; Urrutia, B.; Díaz-Delfa, C.; Santiago-Moreno, J.; Gómez-Brunet, A.

doi:10.1016/j.theriogenology.2007.08.003

Cited by 39 publications

(32 citation statements)

References 24 publications

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“…Even at latitude 25°N, native breeds are capable to breed in spring (Mellado et al 2006); however, indiscriminate crossbreeding of native goats with dairy breeds originated in the Alps has led to seasonal anoestrous in crossbred goats at this latitude, although this seasonal anestrous is less marked than that observed in temperate zones (males: Todini et al 2007;Zarazaga et al 2009;females: Carcangiu et al 2009;Arrebola et al 2010). Induction of fertile estrus for out of season breeding is important for goat producers in many countries in order to overcome the seasonality of the goat milk supply; thus, a considerable research has been carried out to enable yearround kidding of goats (Husein et al 2005;López-Sebastian et al 2007). Several methods are available to induce off-season cyclicity and estrous synchronization in does.…”

Section: Introductionmentioning

confidence: 99%

Influence of sexually inactive bucks subjected to long photoperiod or testosterone on the induction of estrus in anovulatory goats

Luna-Orozco¹,

Guillen-Muñoz

Santiago-Miramontes

et al. 2011

Trop Anim Health Prod

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The objective of this study was to evaluate the efficacy of treating sexually inactive bucks with artificial long photoperiod or testosterone on the induction of estrus in anovulatory grazing goats. A total of 91 multiparous mixed-breed anestrous goats were randomly assigned to one of three treatment groups: (1) joining with bucks subjected to 2.5 month of artificial long days (16 h of light/day; n=31), (2) joining with testosterone-treated bucks (n=30), and (3) joining with untreated bucks (control; n=30). There were no differences between the light-treated (100%) and testosterone-treated (93%) bucks in their ability to induce estrus in anovulatory does. On the other hand, none of the goats in contact with control bucks exhibited estrus. The interval from start of mating to estrus was shorter in goats with the light-treated bucks (37.9 ± 4.8 h) compared with does in contact with testosterone-treated bucks (58.3 ± 8.7 h). The overall pregnancy rate in goats joined with light-treated, testosterone-treated and control bucks was 84%, 77% and 0%, respectively, with no difference (P>0.05) between the first two groups. Anogenital sniffing, approaches, mounting attempts, and mounts were highest (P<0.01) in light-treated bucks and lowest in control bucks. It was concluded that testosterone-treated bucks and long-day-treated bucks were equally effective in synchronizing estrus in anovulatory goats and resulted in similar levels of fertility. Given that light-treated bucks are unviable in communal production systems of goats raised by resource-poor farmers, the sexual arousal of bucks with testosterone is a practical and reliable method to induce ovulation in anovulatory goats in pastoral goat systems in hot environments.

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Section: Introductionmentioning

confidence: 99%

Influence of sexually inactive bucks subjected to long photoperiod or testosterone on the induction of estrus in anovulatory goats

Luna-Orozco¹,

Guillen-Muñoz

Santiago-Miramontes

et al. 2011

Trop Anim Health Prod

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“…The most widespread methods of goat synchronization estrus are 9∼16 days of treatment with fluorogestone acetate (FGA) or medroxyprogesterone acetate (MAP)-impregnated vaginal sponges and intramuscular injection of pregnant mare serum gonadotrophin (PMSG) at the time of sponge removal (Motlomelo et al 2002;Amarantidis et al 2004;Baldassarre and Karatzas 2004;Fonseca et al 2005); double injection of PG F2 alpha (PGF 2α ) or its analogs, about 11 days (10∼14 days) apart (Nuti et al 1992;Amarantidis et al 2004;Baldassarre and Karatzas 2004;Leite et al 2006); and 11-day (8∼12 days) treatment with FGA or MAP-impregnated intravaginal sponges and intramuscular injection of PMSG and PGF 2α or its analogs 48 h before sponge withdrawal (Amarantidis et al 2004;Baldassarre and Karatzas 2004;Khanum et al 2006;Dogan et al 2008a). The efficiency and ovarian response of goats to estrous synchronization varies with the type of intravaginal sponge, kind of progestagen (Romano 1996), breed, nutritional status (Mani et al 1992), stress, environment, male effect (Lopez-Sebastian et al 2007), and procedures of administration of hormone (Chao et al 2008;Dogan et al 2008b). At present, progesterone intravaginal sponges gave a response of only 35∼50% in goats in the tropic area (Rosnina et al 1992).…”

Section: Introductionmentioning

confidence: 99%

Efficiency of methods applied for goat estrous synchronization in subtropical monsoonal climate zone of Southwest China

Zhao

Zhang

Wei

et al. 2010

Trop Anim Health Prod

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Two experiments were undertaken to select the efficient method applied for goat estrous synchronization. In experiment 1, a total of 120 does (Capra hircus) were divided into five groups with a randomized block design, and the does of treatment 1 were synchronized by intravaginal sponges impregnated with 30 mg Levonorgestrel inserted for 10 days. Does of treatments 2, 3, and 4 were treated with further injection of 25 IU follicle-stimulating hormone (FSH), 0.05 mg prostaglandin F2 alpha (PGF(2alpha)), and 25 IU FSH + 0.05 mg PGF(2alpha) at sponge withdrawal, respectively. The does in the control group (n = 40) without estrous synchronization treatment and natural estrous does were observed. In experiment 2, a total of 140 does in five goat farms in breeding and non-breeding seasons were treated with the selective efficient procedure. The results presented that all the employed treatments were capable of inducing and synchronizing estrous goats. According to estrous response and economy, the use of intravaginal sponges impregnated with 30 mg Levonorgestrel and 0.05 mg PGF(2alpha) (treatment 3) is the first choice for estrous synchronization, and 95.0% of synchronized does demonstrated estrus, which was significantly higher than that of treatment 1 (P < 0.05) and control group (P < 0.01). The percentages of ovulating of treatments 3 and 4 were the same (95.0%), which were significantly higher than that of treatment 1 (P < 0.01). The ovulation rates among different groups were not significant (P > 0.05). When the selective procedure was applied to five goat farms, 85.7% (120/140) of does demonstrated estrus, and the kidding percentage, litter size, and prolificacy rate were 53.6%, 0.95, and 177%, respectively.

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“…Different biostimulation techniques have been used effectively in initiating and enhancing the sexual behaviour and reproductive cycles in rabbits (Eiben et al, 2007;Rodríguez-de Lara et al, 2010;González-Mariscal et al, 2015). The buck (López-Sebastian et al, 2008) and Whitten (Pallares and Gonzalez-Bulnes, 2009) effects have been proven to be a practical method to induce sexual activity in anoestral females. Bonanno et al (2003) reported that presence of the buck increased the fertility of does.…”

Section: Discussionmentioning

confidence: 99%

Biostimulation and reproductive performance of artificially inseminated rabbit does (Oryctolagus cuniculus)

2017

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Biostimulation is a non-hormonal and practical technique that has not yet been widely utilised when applied immediately before insemination to improve reproductive efficiency in livestock species. This study was conducted to determine the influence of short-term male biostimulation on behavioural and reproductive performance of inseminated rabbit does. A total of 142 female New Zealand White rabbits were randomly assigned to 3 groups. Females were either exposed to male odour (Odour group) or an adult aproned male (Male group), while the remaining does that were neither exposed to the male odour nor the adult male are considered the control group. All females were inseminated after the 2 h exposure session. Conception rates were determined by abdominal palpation 12 d after insemination. The results showed that conception rate of the male odour group (79.59%) was greater than that of male presence group (76.09%) and that of the control group (68.09%). Moreover, biostimulated does showed significant behavioural activities during the 2 h exposure session compared to the control group. Although no significant differences were recognised, litter size at birth and at weaning was slightly increased in biostimulated compared to control females. Nor were there any significant difference in serum oestradiol concentrations between treated groups. Conclusively, short-term 2 h biostimulation of rabbit does resulted in the appearance of various behavioural responses followed by differences in conception rates between groups after routine artificial insemination.

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New estrus synchronization and artificial insemination protocol for goats based on male exposure, progesterone and cloprostenol during the non-breeding season

Cited by 39 publications

References 24 publications

Influence of sexually inactive bucks subjected to long photoperiod or testosterone on the induction of estrus in anovulatory goats

Influence of sexually inactive bucks subjected to long photoperiod or testosterone on the induction of estrus in anovulatory goats

Efficiency of methods applied for goat estrous synchronization in subtropical monsoonal climate zone of Southwest China

Biostimulation and reproductive performance of artificially inseminated rabbit does (Oryctolagus cuniculus)

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