Carrillo-Díaz F, Escalera-Valente F, Martínez-González S, Aguirre-Ortega J, Barajas-Cruz R, Romo-Javier AR, Oropeza-Bautista G

Language: Spanish
References: 17
Page: 12-17
PDF size: 272.03 Kb.

ABSTRACT

Evaluate the effect of vaginal sponges with 40 mg flurogestone acetate (FGA) placed for 12 days after mating on fertility and prolificacy in Pelibuey-ewes. The study was conducted from July to January of next year, 44 Pelibuey cycling-ewes of several ages and parity number were used. The control group was formed by 22 females and 22 treated group. In females of the treated group a vaginal sponge with 40 mg of FGA was applied three days after the service for 12 days, pregnancy diagnosis was performed 30 days later. FGA application increased (P ‹ 0.05) fertility from 63.61% to 81.82%. Total new born lambs were higher (P ‹ 0.01) in the group that received FGA in relationship to Control (20 vs. 32 lambs), and prolificacy was increased (P ‹ 0.01) from 1.42 to 1.78 lambs by parturition in females that received FGA. That vaginal-sponges with 40 mg of FGA three days after service and with a permanency of 12 days before removed promotes reproductive performance in Pelibuey ewes under grassing condition.

REFERENCES

1. AINSWORTH L, Wolynetz S. Synchronization of oestrus and reproductive performance of ewes treated with synthetic progestagenos administered by subcutaneous ear implant or by intravaginales sponge pessry. J Anim Sci. 1982; 54: 1120-1127.

2. ALI A. Effect of time of eCG administration of follicular response and reproductie performance of FGA-treated ossimi ewes. Small Rum Res. 2007; 72:33-37.

3. BINELLI M, Tatcher WW, Mattos R, Baruselli PS. Antiluteolytic strategies to improve fertility in cattle. Theriogenology. 2001; 56: 1451- 1463.

4. DOMINGUEZ F, Pellicer A, Simon C. Paracrine dialogue in implantation. Mol Cell Endocrinol. 2002; 186:175- 181.

5. DUNNE L, Disken M, Streenan J. Embryonic and foetal loss in beef heifers between day 14 of gestation and full term. Anim Reprod. 2000; 58:39.

6. FUENTES J, Gognie Y, Lima T. The effect of Oestrus syncronization and mating seapon on the productivity of Pelibuey ewes. Ann Zootech. 1984; 33(4) 545.

7. GONZÁLEZ-REYNA A, Murphy BD. Effect of GnRH onluteinizing hormone release and onset of cyclic ovarian activity post partum in Pelibuey ewes. Can J Anim Sci. 1987; 6: 359-366.

8. HAWK HW, Conley HH. Investigation of Sperm Transport failures in ewes administered synthetic progestagen. J Anim Sci. 1972; 34: 609-613.

9. INEGI. Anuario Estadístico del estado de Nayarit. Instituto Nacional de Estadística, Geografía e Informática. México 1999; Pp. 4-5.

10. LASTER DB, Glimp HA. Influence of breed on response to exogenous hormones in estrous and anaestrus ewes. J Anim Sci.1974; 39:1129-1135.

11. MARTÍNEZ N, Ruiz R, Castillo H. Sincronización del estro en Borregas Tabasco o Pelibuey. Tec Pec Mex. 1979; 36: 28.

12. MEJÍA V, Murcia M, Valencia M, Espinosa A. Administración postmonta de acetato de fluorogestona en ovejas donadoras de embriones. J Dairy Sci.1998; 92: 1-9.

13. RODRÍGUEZ R. Manejo Reproductivo en: Tecnología para la producción de Ovejas Tropicales. Castellanos R.A.F. y Arellano S,C (Eds). FAO Of Reg. Amer. Latina y el Caribe. Santiago, Republica de Chile. 1989; Pp: 41-52.

14. SAS. SAS/STAT User’s Guide (Release 8.0). SAS Inst. Inc., Cary. NC. 2000.

15. SPENCER TE, Bazer FW. Biology of progesterone action during pregnancy recognition and maintenance of pregnancy. Front Biosci. 2002; 1879- 1898.

16. URBIOLA M, Leyva V, Huaman H, García W. Manipulación de la ovulación del folículo dominante con prostaglandina en diferentes estadios del ciclo estrual sobre tasas reproductivas en ovinos Corriedale. Rev Inv Vet. 2005; 16(2):103-113.

17. ZARCO L, Stabenfeld H, Quirke F, Bradford E, Kindahl H. Release of prostaglandin F2 alpha and timing of events associated with luteolisis in ewes with oestrous cycles of different lengths. J Reprod and Fert. 1988; 83: 517-526.