The Possibilities of Twice-Yearly Lambing of Awassi Sheep Ewes Without Using Hormones in an Organic Animal Production System

This goal of the present research was to determine the possibility of twice-yearly lambing in Awassi sheep. The research was appropriate in terms of ecological agriculture, animal breeding applications, and organic agricultural production with no impact on their health or behavior, or exposure to environmental conditions such as exogenous hormone applications. The research was carried out after the February 2001 lambing season. Rams were introduced to the ewe flock while the lambs were weaning. The sheep's giving birth in August 2001 indicated that they had become pregnant while the lambs were weaning. The fertility rate in the August 2001 birth season was much lower than that in the February 2001 fertility season. However, the February and August 2001 fertility rates together showed that the gestation rate increased 40% and approximately 40% to 44%, respectively, over a year.

The Possibilities of Twice-Yearly Lambing of Awassi Sheep Ewes Without Using Hormones in an Organic Animal Production System

This goal of the present research was to determine the possibility of twice-yearly lambing in Awassi sheep. The research was appropriate in terms of ecological agriculture, animal breeding applications, and organic agricultural production with no impact on their health or behavior, or exposure to environmental conditions such as exogenous hormone applications. The research was carried out after the February 2001 lambing season. Rams were introduced to the ewe flock while the lambs were weaning. The sheep's giving birth in August 2001 indicated that they had become pregnant while the lambs were weaning. The fertility rate in the August 2001 birth season was much lower than that in the February 2001 fertility season. However, the February and August 2001 fertility rates together showed that the gestation rate increased 40% and approximately 40% to 44%, respectively, over a year.

___

  • TKİB: Organik tarım el kitabı. T.C. Tarım ve Köyiflleri Bakanlığı, Ankara. 2001; 26-32.
  • Kaymakçı, M., Sönmez. R.: İleri Koyun Yetifltiriciliği, Ege Üniv. Basımevi. İzmir. 1996; 42-43.
  • Zarkawi, M.: The evaluation of two doses of prostaglandin F2_ analague, Prosolvin, for oestrous synchronisation of Syrian Awassi ewes. New Zealand J. Agri. Res., 2000; 43: 509.
  • Hamadeh, S.K., Moussa, Z., Abi-Said, M., Barbour, E.K.: Physiological indicators of adaptation in Awassi and Finn x Texel x Awassi sheep. Options Mediterran., Zaragoza. 1997; 33: 231- 236.
  • Al Jassim, R.A.M., Aziz, D.I., Zorah, K., Black, J.L.: Effect of concentrate feeding on milk yield and body weight change of Awassi ewes and the growth of their lambs. J. Anim. Sci., 1999; 69: 441-446. 6. Al Jassim, R.A.M., Hassan, A.A., Al Kass, J.E.: Seasonal variation in wool growth rate of Awassi sheep in Iraq. Indian J. Anim. Sci., 1997; 67: 913- 915. 7. Mavrogenis, A.P.: Environmental and genetic factors influencing milk and growth traits of the Awassi sheep in Cyprus. Small Rumin. Res., 1996; 20: 59-65.
  • Gootwine, E., Bor, A., Braw-Tal, R. Zenou, A.: Reproductive performance and milk production of the improved Awassi breed as compared to its crosses with the Booroola Merino. J. Anim. Sci., 1995; 60: 109-115. 9. Kingwell, R.S., Abdi-Ghadim, K. A., Robinson, A.D.: Introducing Awassi sheep to Australia. Agricultural Systems 47, Melbourne. 1995; 451-471.
  • Ceyhan, A., Serbester, U., Öztürk, D.: GAP bölgesinde koyun ve kuzu eti üretiminin artırılması olanakları. GAP 1. Tarım Kongresi, fianlıurfa. 1999; 1062.
  • Alaçam, E., Deveci, H., Dinç, D.A, Gökçen, H., İzgür, H., Kılıçoğlu, Ç., Küplülü, fi., fienünver, A., Tekin, N., Yurdaydın, N.: Theriogenoloji. Evcil hayvanlarda reprodüksiyon, sun’i tohumlama, obstetrik ve infertilite. Ankara. 1990; 71.
  • Sönmez, R., Kaymakçı, M.: Koyunlarda Döl Verimi. Ege Üniv. Zir. Fak. Yayınları. İzmir. 1987; 404: 54-57
  • Kaymakçı, M.: Kimi yerli koyunlarda temel döllenme özelliklerinin değiflimi üzerinde arafltırmalar. Çayır-Mer’a ve Zootekni Arafltırma Enstitüsü Yayınları, Ankara 1984; 92: 18-21.
  • Zarkawi, M.: Monitoring the reproductive performance in Awassi ewes using progesterone radioimmunoassay in Awassi sheep. Small Rumin. Res., 1997; 26: 291-294.
  • Kassem, R.. The Awassi sheep project in Syria. Increasing small ruminant productivity in semi-arid areas. Proceedings of ICARDA. 1988; 155-163.
  • Aflkın, Y.: Anadolu merinoslarında eksogen hormon kullanılarak yılda iki kez kuzulama olanakları üzerine arafltırmalar. Ankara Üniv. Ziraat Fakültesi. Bilimsel arafltırma ve incelemeler.1988; 1101: 4.
  • Öztürk, A., Dellal, G.: Border Leicester x Booroola(ff) x Merinos melezi koyunlarda anestrus dönemi esnasında farklı dozlarda PMSG uygulamasının döl verimi üzerine etkileri. Ankara Üniv. Zir. Fak. Tarım Bilimleri Dergisi. Ankara. 1999; 5: 35-39.
  • Eliçin., A.: Koyunlarda döl verimi ve buna tesir eden faktörler. Hayvancılıkta İleri Teknikler Semineri. Tarım İflletmeleri Genel Müdürlüğü Yayınları. Ankara. 1984: 4-11.
  • Düzgünefl, O., Kesici, T., Gürbüz, F., İstatistik Metodları-I. Ankara Üniv. Zir. Fak. Yayınları., 1983; 861: 80-81.
  • Bodin, L., Drion P.V., Remy B., Brice, G., Cognie, Y., Beckers, J.F.: Anti-PMSG antibody levels in sheep subjected annually to oestrus syncronisation. Reprod. Nutr. Dev., 1997; 37: 650-660.
Turkish Journal of Veterinary and Animal Sciences-Cover
  • ISSN: 1300-0128
  • Yayın Aralığı: 6
  • Yayıncı: TÜBİTAK
Sayıdaki Diğer Makaleler

Some Biological Properties of the Leuciscus cephalus (L., 1758) Population Living in Karakaya Dam Lake in Malatya (Turkey)

Ercan KALKAN, Muhittin YILMAZ, A. Ümit ERDEMLİ

The Results of Phacofragmentation and Aspiration Surgery for Cataract Extraction in Dogs

Fatma Eser ÖZGENCİL

Effect of Certain Factors on Productive and Reproductive Efficiency Traits and Phenotypic Relationships Among These Traits and Repeatabilities in West Anatolian Holsteins

Mustafa TEKERLİ

Bioaccumulation of some heavy metals (Cd, Fe, Zn, Cu) in two bivalvia species

Özlem FINDIK, Fatma ÇEVİK, Mustafa AKAR, Münir Ziya Lugal GÖKSU

Gonadal Oocyte Development in LHRHa Hormone Treated European Sea Bass (Dicentrarchus labrax L., 1758) Broodstock

Kürşat FIRAT, Şahin SAKA, Cüneyt SUZER

Research on the Factors Affecting Cholesterol Content and Some Other Characteristics of Eggs in Laying Hens The effects of genotype and rearing system

Hatice BASMACIOĞLU, Mustafa ERGÜL

The Possibilities of Twice-Yearly Lambing of Awassi Sheep Ewes Without Using Hormones in an Organic Animal Production System

Ümit YAVUZER

Heritabilities of Tonic Immobility and Leucocytic Response in Sire and Dam Layer Lines

Özge ALTAN, Petek SETTAR, Yakut ÜNVER, Metin ÇABUK

Doğu Karadeniz, Trabzon-Rize Sahillerinde Pisi Balığında (Platichthys flesus luscus Pallas, 1811) Stoğa Katılım ve Üreme Döneminin Belirlenmesi

Erhan ÇİLOĞLU

Relationships Between Milk Yield and Udder Measurements in Brown Swiss Cows

Muammer TİLKİ