Effect of breeding season on fertility of sheep following estrus synchronization and fixed-time artificial insemination under field conditions in semi-arid tropical region

References

• Acharya RM. 1986. Small ruminant production in arid and semi-arid Asia. In: Timon VM, Hanrahan JP, editors. Small ruminant production in the developing countries. Rome: Food and Agriculture Organization of the United Nations; p. 148–169.
   Google Scholar
• Amiridis GS, Cseh S. 2012. Assisted reproductive technologies in the reproductive management of small ruminants. Anim Reprod Sci. 130:152–161.10.1016/j.anireprosci.2012.01.009
   PubMed Web of Science ®Google Scholar
• Arora CL, Garg RC. 1998. Sheep Production and Breeding. Lucknow: International Book and Distribution Company.
   Google Scholar
• Ben Salem H, Smith T. 2008. Feeding strategies to increase small ruminant production in dry environments. Small Ruminant Res. 77:174–194.10.1016/j.smallrumres.2008.03.008
   Web of Science ®Google Scholar
• Bohra SDJ, Jain A, Sharma SC. 1993. Kheri a new type of sheep in Rajasthan (India). Wool Woollens India. 23–24.
   Google Scholar
• Carpenter RH, Spitzer JC. 1981. Response of anestrous ewes to norgestomet and PMSG. Theriogenology. 15:389–393.10.1016/0093-691X(81)90005-4
   PubMed Web of Science ®Google Scholar
• Chao LM, Takayama K, Nakanishi Y, Hamana K, Takagi M, Kubota C, Kojima T. 2008. Luteal lifespan and fertility after estrus synchronization in goats. J Vet Sci. 9:95–101.10.4142/jvs.2008.9.1.95
   PubMed Web of Science ®Google Scholar
• Chaturvedi OH, Sankhyan SK, Sahoo A, Karim SA. 2012. Nutrient utilization and reproductive performance of flushing ewes grazing on community rangeland. Indian J Anim Sci. 82:1446–1450.
   Web of Science ®Google Scholar
• Chedid M, Jaber LS, Giger-Reverdin S, Duvaux Ponter C, Hamadeh SK. 2014. Review: water stress in sheep raised under arid conditions. Canadian Journal of Animal Science. 94:243–257.10.4141/cjas2013-188
   Web of Science ®Google Scholar
• Dawe ST, Roberts EM, Killeen ID. 1969. MAP impregnated intravaginal sponges for the induction of oestrus in anoestrous Border Leicester × Merino ewes. 1. Lactating ewes. Aust J Exp Agric. 9:385–388.10.1071/EA9690385
   Google Scholar
• De K, Kumar D, Sethi D, Gulyani R, Naqvi SMK. 2015. Estrus synchronization and fixed-time artificial insemination in sheep under field conditions of a semi-arid tropical region. Trop Anim Health Prod. 47:469–472.10.1007/s11250-014-0735-x
   PubMed Web of Science ®Google Scholar
• deNicolo G, Morris ST, Kenyon PR, Morel PCH, Parkinson TJ. 2008. Induced seasonal reproductive performance in two breeds of sheep. Anim Reprod Sci. 103:278–289.10.1016/j.anireprosci.2007.01.009
   PubMed Web of Science ®Google Scholar
• Dýrmundsson OR, Jónmundsson JV, Ólafsson T. 2007. The development of artificial insemination in sheep and goats in Iceland. In: 58th Annual Meeting of the European Association for Animal Production August 2007; Dublin, Ireland; p. 26–29.
   Google Scholar
• Fukui Y, Kobayashi M, Kojima M, Ono H. 1985. Effect of PMSG and fixed time GnRH injections on estrus incidence and fertility in physiologically different ewes pre-treated with progesterone-impregnated vaginal sponge during the non breeding season. Theriogenology. 24:631–641.10.1016/0093-691X(85)90161-X
   Web of Science ®Google Scholar
• Gonzalez-Bulnes A, Veiga Lopez A, Garcia P, Garcia-Garcia RM, Ariznavarreta C, Sanchez MA, Tresguerres JAF, Cocero MJ, Flores JM. 2005. Effects of progestagens and prostaglandin analogues on ovarian function and embryo viability in sheep. Theriogenology. 63:2523–2534.10.1016/j.theriogenology.2004.10.013
   PubMed Web of Science ®Google Scholar
• Goot H, Maijala K. 1977. Reproductive performance at first lambing and in twice-yearly lambing in a flock of Finnish Landrace sheep in Finland. Anim Prod. 25:319–329.10.1017/S0003356100016731
   Google Scholar
• Gowane GR, Prince LLL, Paswan C, Misra SS, Sharma RC, Naqvi SMK. 2014. Genetic analysis of reproductive and fitness traits of malpura sheep in semi-arid tropics of India. Agric Res. 3:75–82.
   Google Scholar
• Greyling JPC, Vander-Westhuysen JM. 1980. The synchronization of oestrus in sheep. 4. Inseminationat oestrusorona time basis. South Afr J Anim Sci. 10:69–72.
   Google Scholar
• Hunter MG, Southee JA, McLeod BJ, Haresign W. 1986. Progesterone pretreatment has a direct effect on GnRH induced preovulatory follicles to determine their ability to develop into normal corpora lutea in anestrous ewes. J Reprod Fertil. 76:349–363.10.1530/jrf.0.0760349
   PubMedGoogle Scholar
• Hunter RHF, Vajta G, Hyttel P. 1998. Long-term stability of the bovine block to polyspermy. J Exp Zool. 280:182–188.10.1002/(ISSN)1097-010X
   PubMedGoogle Scholar
• Indu S, Sejian V, Naqvi SMK. 2015. Impact of simulated heat stress on growth, physiological adaptability, blood metabolites and endocrine responses in Malpura ewes under semi-arid tropical environment. Anim Prod Sci. 55:766–776.10.1071/AN14085
   Web of Science ®Google Scholar
• Knight TW, Mc William WH, Kannegieter SG, Sorensen ES, Ridland CJ, Gibb M. 1989. Mating Romney ewes in late spring-December using CIDRs and pregnant mare serum gonadotropin. Proc N Z Soc Anim Prod. 49:255–260.
   Google Scholar
• Knights M, Baptiste QS, Dixon AB, Pate JL, Marsh DJ, Inskeep EK, Lewis PE. 2003. Effects of dosage of FSH, vehicle and time of treatment on ovulation rate and prolificacy in ewes during the anestrous season. Small Ruminant Res. 50:1–9.10.1016/S0921-4488(03)00111-1
   Web of Science ®Google Scholar
• Kukovics S, Gyoker E, Nemeth T, Gergatz E. 2011. Artificial insemination of sheep–possibilities, ralities and techniques at farm level. In: Manafi M, editor. Artificial insemination in farm animals. CBA Publishers & Distributors Pvt Ltd. doi: 10.5772/16642.
   Google Scholar
• Lewis RM, Notter DR, Hogue DE, Magee BH. 1996. Ewe fertility in the STAR accelerated lambing system. J Anim Sci. 74:1511–1522.
   PubMed Web of Science ®Google Scholar
• Martinez MF, McLeod B, Tattersfield G, Smaill B, Quirke LD, Juengel JL. 2015. Successful induction of estrus, ovulation and pregnancy in adult ewes and ewe lambs out of the breeding season using a GnRH + progesterone oestrus synchronisation protocol. Anim Reprod Sci. 155:28–35.10.1016/j.anireprosci.2015.01.010
   PubMed Web of Science ®Google Scholar
• Morris ST, Morel PCH, Kenyon PR, Kemp PD, Burnham DL, West DM, Peterson SW, Gray DI, Scott I, Pomroy WE. 2000. Year-round lamb production in the Manawatu region – results from year one. Proc N Z Grassland Assoc. 66:215–219.
   Google Scholar
• Mulvaney FJ, Morris ST, Kenyon PR, Morel PCH, West DM, Vinoles C, Glover KMM. 2013. Comparison between the reproductive performance of ewe hoggets and mature ewes following a progesterone-based oestrus synchronization protocol. N Z J Agric Res. 56:1–9.
   Web of Science ®Google Scholar
• Naqvi SMK, De K, Gowane GR. 2013. Sheep production system in Arid and Semi-Arid regions of India. Ann Arid Zone. 52:1–9.
   Google Scholar
• Quinlivan TD. 1970. The relationship between numbers of spermatozoa inseminated and fertilization rate of ova in ewes treated with fluoro-progestagen intravaginal sponges in summer and autumn. J Reprod Fertil. 23:87–102.10.1530/jrf.0.0230087
   PubMedGoogle Scholar
• Rexroad CE, Barb CR. 1977. Cervical mucus in estrous ewes after treatment with estrogen, progestogens and intrauterine devices. J Anim Sci. 44:102–105.
   PubMed Web of Science ®Google Scholar
• Saxena VK, De K, Kumar D, Naqvi SMK, Krishnaswamy N, Tiwari AK. 2015. Induction of ovulation in anestrus ewes using a dopamine receptor antagonist. Theriogenology. 84:1362–1366.
   PubMed Web of Science ®Google Scholar
• smith JF, allison AJ. 1971. The effect of exogenous progestagen on the production of cervical mucus in the ewe. J Reprod Fertil. 24:279–282.10.1530/jrf.0.0240279
   PubMedGoogle Scholar
• Smith JF, Cruickshank GF, Mc Gowan LT, Parr J, Mortimer BJ. 1988. Seasonal changes in oestrus, ovulation and conception of Coopworth ewes treated with CIDRs and PMSG. Proc N Z Soc Anim Prod. 48:99–102.
   Google Scholar
• Southee JA, Hunter MG, Haresign W. 1988. Function of abnormal corpora lutea in vivo after GnRH-induced ovulation in the anestrous ewe. J Reprod Fertil. 84:131–137.10.1530/jrf.0.0840131
   PubMedGoogle Scholar
• Ungerfeld R, Rubianes E. 1999. Effectiveness of short-term progestogen primings for the induction of fertile oestrus with eCG in ewes during late seasonal anoestrus. Anim Sci. 68:349–353.
   Google Scholar
• Ungerfeld R, Rubianes E. 2002. Short term primings with different progestogen intravaginal devices (MAP, FGA and CIDR) for eCG-estrous induction in anestrus ewes. Small Ruminant Res. 46:63–66.10.1016/S0921-4488(02)00105-0
   Web of Science ®Google Scholar
• Vataliya PH. 1993. Studies on genetic parameters of early and lifetime productivity traits in Patawadi and crossbred sheep [ PhD Thesis]. Gujrat, Sardar Krushinagar Agricultural University, Dantiwada, India.
   Google Scholar
• Wheaton JE, Windels HF, Johnston LJ. 1992. Accelerated lambing using exogenous progesterone and ram effect. J Anim Sci. 70:2628–2635.
   PubMed Web of Science ®Google Scholar
• White LM, Keisler DH, Dailey RA, Inskeep EK. 1987. Characterization of ovine follicles destined to form subfunctional corpora lutea. J Anim Sci. 65:1595–1601.
   PubMed Web of Science ®Google Scholar
• Wildeus S. 2000. Current concepts in synchronization of estrus: sheep and goats. J Anim Sci. 77:1–14.
   Google Scholar
• Wortzman GB, Evans JP. 2005. Membrane and cortical abnormalities in post-ovulatory aged eggs: analysis of fertilizability and establishment of the membrane block to polyspermy. Mol Hum Reprod. 11:1–9.
   PubMed Web of Science ®Google Scholar