Effects of oestrus synchronisation by double FGA-‐sponge or split eCG administrations upon the reproductive traits in angora goats during the breeding season

Sunulan çalışmada, üreme sezonundaki Ankara keçilerinde çiftleşme sonrası FGA/P4 ve farklı dozlarda bölünmüş eCG/PMSG enjeksiyonlarının östrus senkronizasyonundaki etkileri araştırıldı. Toplam 36 baş anaç (önceden doğum yapmış) keçi iki ayrı senkronizasyon grubuna ayrıldı. Çalışma l'de (çift doz FGA), keçilere 11 gün süreyle 20 mg FGA içeren vagina-içi sünger uygulandı. Hayvanlara 9. günde, 125 mg cloprostenol ve 400 IU eCG birlikte enjekte edildi. Çiftleşme sonrası 6. günde, hayvanlar tek (kontrol, n=13) veya çift doz FGA grubu (n=9), ikinci FGA 11 gün süreyle, olmak üzere rastgele iki deneme grubuna ayrıldı. Çalışma 2'de (bölünmüş eCG), 14 baş keçi rasgele tarzda eCG 750 ve eCG 500 gruplarına ayrılarak (n=7, her biri), ilk gruba 750 IU eCG (iki kez 250, iki kez 100 ve son kez 50 IU) verilirken, diğer gruba ise 500 IU eCG (günlük 100 IU) çoklu enjeksiyon tarzında (ardışık 5 gün süreli) olarak verildi. Sonuç olarak; i) çift doz/çiftleşme sonrası FGA uygulamasının çalışılan üreme parametreleri üzerine bir katkısının olmadığı, ii) sadece eCG uygulamasının ise yavru verimi ve ikizlik yönünden belli düzeyde daha düşük oranlara yol açtığı kanısına varıldı.

Ankara keçilerinde sezon-‐içi östrus senkronizasyonu amacıyla çift doz FGA sünger veya bölünmüş eCG uygulamalarının üreme özellikleri üzerine etkileri

Abstract: In this study, the effects of post-mating FGA/P4 and of split eCG/PMSG injections at different doses were evaluated for the induction of oestrus in Angora goats during the breeding season. In total, thirty-six multiparous does were assigned into two separate synchronisation trials. In Experiment 1 (double FGA), 22 does were administered all firstly an intravaginal sponge containing 20 mg FGA for 11 days. On day 9, the animals then received i.m. injections of 125 mg cloprostenol, and of 400 IU eCG concurrently. On day 6 post-mating, animals were randomly assigned into two groups, as control (n=13), single and double FGA group (n=9), receiving the second FGA for 11 days. In Experiment 2 (split eCG), 14 does were randomly assigned into eCG 750 and eCG 500 groups (n=7 each), with multiple injections (on 5 consecutive days) of 750 (250 and 100 in double and 50 IU at last) or of 500 IU (100 IU daily). The results showed that; i) double/post-mating FGA had no favourable effect upon the reproductive parameters studied, ii) the eCG itself led to a considerably poorer fertility and twinning in Angora does during the breeding season.

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Amarantidis I., Karagiannidis A., Saratsis P., Brikas P., 2004. Efficiency of methods used for estrus synchronization in Indigenous Greek goats. Small Rumin. Res., 52, 247-252.
Baril G., Saumande J., 2000. Hormonal treatments to control time of ovulation and fertility of goats. In: Proceedings of the 7th International Conference on Goats. Poitiers, France, 400-405.
Baril G., Freitas VJF., Saumande J., 1998. Progestagen-treatments for the induction/synchronisation of oestrus in goats: update on recent research. Rev. Med. Vet., 149, 359-366.
Baril G., Leboeuf B., Saumande J., 1993. Synchronization of estrus in goats: relationship between time of occurrence of estrus and fertility following artificial insemination. Theriogenology, 40, 621-628.
Beck NFG., Peters AR., Williams SP., 1994. The effect of GnRH agonist (buserelin) treatment on day 12 post-mating on the reproductive performance of ewes. Anim. Prod., 58, 243-247.
Bitaraf A., Zamiri MJ., Kafi M., Izadifard J., 2007. Efficacy of CIDR, Fluorogestone acetate sponges and cloroprostenol for estrous synchronisaiton of Nadooshani goats during the breeding season. Iranian J. Vet. Res., 8, 218-224.
Cam MA., Kuran M., Yildiz S., Selçuk E., 2002. Fetal growth and reproductive performance in ewes administered GnRH agonist on day 12 postmating. Anim. Reprod. Sci., 72, 73-82.
Doğan I., Nur Z., Gunay U., Soylu MK., Sönmez C., 2004. Comparison of fluorogestone and medroxyprogesterone intravaginal sponges for oestrus synchronization in Saanen does during the transition period. S. Afr. J. Anim. Sci., 34, 18-22.
Fonseca JF., 2002. Controle e perfil hormonal do ciclo estro e performance reprodutiva de cabras Alpinas e Saanen. PhD Thesis, Departamento de Zootecnia, Universidade Federal de Viçosa, Laboratörio de Reproduçâo Animal, Viçosa, Brasil.
Fonseca JF., Bruschi JH., Santos ICC., Viana JHM., Magalhaes, ACM., 2005. Induction of estrus in non-lactating dairy goats with different estrous synchrony protocols. Anim. Reprod. Sci., 85, 117-124.
Freitas VJF., Baril G., Saumande J., 1997. Estrus synchronization in dairy goats: use of fluorogestone acetate vaginal sponges or norgestomet ear implants. Anim. Reprod. Sci., 46, 237-244.
Greyling JPC., Van Der Nest M., 2000. Synchronization of oestrus in goats: dose effect of progestagen. Small Rumin. Res., 36, 201-207.
Greyling JPC., Van Niekerk CH., 1991. Different synchronization techniques in Boer does outside the normal breeding season. Small Rumin. Res., 5, 233-243.
Holtz W., Sohnrey B., Gerland M., Driancourt MA., 2008. Ovsynch synchronisation and fixed-time insemination in goats. Theriogenology, 69, 785-792.
Inshwar AK., Pandey JN., 1990. Estrus synchronization and fertility behaviour in black Bengal goats, following either progesterone of prostaglandin treatment. Theriogenology, 34, 1015-1024.
Karaca F., Tasal I., Alan M., 2009. Preliminary report on induction of estrus with multiple eCG injections in Colored Mohair goats during the anestrus season. Anim. Reprod. Sci., 114, 306-310.
Kılboz El., Karaca F., 2010. Üreme mevsimi dışında genç keçilerde flurogeston asetat vaginal sünger ve norgestomet kulak implantı uygulamalarıyla östrusların uyarılması. YYU. Vet. Fak. Derg., 21, 1-6.
Leboeuf B., Forgerit Y., Barnelas D., Pougnard JL., Senty E., Driancourt MA., 2003. Efficacy of two types of vaginal sponges to control onset of oestrus, time of preovulatory LH peak and kidding rate in goats inseminated with variable numbers of spermatozoa. Theriogenology, 60, 1371-1378.
Mani AU., Mckelvey WAC., Watson ED., 1992. The effects of low level of feeding on response to synchronization of estrus, ovulation and embryo loss in goats. Theriogenology, 38, 1013-1022.
Mann GE., Lamming GE., 1999, The influence of progesterone during early pregnancy in cattle. Reprod. Domes. Anim., 34, 269-274.
Martemucci G., Casamassima D., D'alessandro AG., 2011. Synchronization of oestrus in goats with Progestogen sponges and short term combined FGA, PGF2a protocols. World Academy of Science, Engineering and Technology, 78, 297-299.
Nancarrow CD., 1994. Embryonic mortality in the ewe and doe. In: "Embryonic Mortality in Domestic Species", Ed., MT. Zavy, RD. Geisart, CRC Press, London, 79-98.
Regueiro M., Pearez Clariget R., Ganzabal A., Aba M., Forsberg M., 1999. Effect of medroxyprogesterone acetate and eCG treatment on the reproductive performance of dairy goats. Small Rumin. Res., 33, 223-230.
Romano JE., 2004. Synchronization of estrus using CIDR, FGA or MAP intravaginal pessaries during the breeding season in Nubian goats. Small Rumin. Res., 55,15-19.
Sartori R.( Sartor-Bergfelt R., Mertens SA., Guenther JN., Parrish JJ., Wiltbank MC., 2002. Fertilization and early embryonic development in heifers and lactating cows in summer and lactating and dry cows in winter. J. Dairy. Sci., 85, 2803-2812.
Silke V., Diskin MG., Kenny DA., Boland MP., Dillon P., Mee JF., Sreenan JM., 2002. Extent, pattern and factors associated with late embryonic losses in dairy cows. Anim. Reprod. Sci., 71, 1-12.
Sreenan JM., Diskin MG., Dunne L., 1996. Embryonic mortality: the major cause of reproductive wastage in cattle. In: Proceedings of the 47th Annual Meeting of the European Association of Animal Production (EAAP), Lillihammer, Norway, August.
Thatcher WW., Meyer MO., Danet-Desnoyers G., 1996. Maternal recognition of pregnancy. J. Reprod. Fertil. Suppl., 49, 15-28.
Trujillo HN., Villasmil JC., Para GF., Suarez JM., Rodriquez PT., Fernandez FC., Huerta LG., Gonzalez YN., 2008. Effect of post-mating progestagen administration on pregnancy rate in crossbreed goats following an induced estrus. Rev. Cient., 5, 578-581.
Ucar O., Kaya M., Yıldız S., Önder F., Cenesiz M., Uzun M., 2005. Effect of progestagen/PMSG treatment for oestrus synchronization of Tuj ewes to be bred after the natural breeding season. Acta Vet. Brno, 74, 385-393.
Ustuner B., Gunay U., Nur Z., Ustuner H., 2007. Effects of long and short-term progestagen treatments combined with PMSG on oestrus synchronization and fertility in Awassi ewes during the breeding season. Acta Vet. Brno, 76, 391-396.
Zarkawi M., Al-Merestani MR., Wardeh MF., 1999. Induction of synchronized oestrus in indigenous Damascus goats outside the breeding season. Small Rumin. Res., 33, 193-197.