Bu araştırma Hamdani, Morkaraman ve Karagül koyunlannda eksojen hormon kullanarak 2 yılda üç kez kuzulatma olanaklarını araştırmak amacıyla yapılmıştır. Araştırmada. 2 yaşlı 28 ve 4 yaşlı 12 baş Hamdani. 2 yaşlı 14 ve 4 yaşlı 36 baş Morkaraman . 2 yaşlı 10 ve 4 yaşlı 25 baş Karagül koyun kullanılmıştır. Araştınnada. Ekim 1998. Haziran 1999 ve Şubat 2000 sıfat dönemlerinde tüm koyunlara 14 gün süreyle 40 mg FGA içeren vajinal sünger uygulanmış ve süngerler çıkarıldığı anda her koyuna 500 IU PMSG enjekte edilmiştir. Bu araştırmada iki tohumlama arası süresi 8 ay olarak dikkate alındı. 8 aylık süre 5 ay gebelik. 2 ay laktasyon ve 1 ay dinlenme periyodundan oluşmuştur. Araştırmada döl verimi özellikleri, kuzularda büyüme ve yaşama güçleri ile koyunlarm sıfat öncesi canlı ağırlık değerleri kaydedilmiştir. Östrus. gebelik, doğum, kuzu verimi ve ikiz doğum oranları ile bir doğuma düşen kuzu sayısı. Ekim sıfat döneminde sırasıyla Hamdanilerde % 90.00. 67.50. 67.50. 67.50, 0.00 ve 1.000, Morkaramanlarda % 90.00, 90.00. 90.00. 104.00, 15.56 ve 1.156, Karagüllerde % 94.28, 91.43. 91.43, 97.10. 6.25 ve 1.063; Haziran sıfat döneminde Hamdanilerde % 90.00. 57.50. 57.50. 62.50. 8.70 ve 1.087. Morkaramanlarda % 94.00, 70.00, 66.00. 72.00. 9.09 ve 1.091. Karagüllerde % 91.43.60.00.60.00.62.90.4.76 ve 1.048: Şubat sıfat döneminde Hamdanilerde % 72.50. 32.50. 32.50. 32.50, 0.00 ve 1.000, Morkaramanlarda % 76.00, 52.00, 50.00. 54.00,8.00 ve 1.080. Karagüllerde % 74.29.54.29.51.43.65.70.27.78 ve 1.278 olarak bulunmuştur. Her üç sıfat döneminde östrus ve doğum başına düşen kuzu sayısı bakımından genotip gruplar arasında fark yokken: gebelik ve doğum oranları bakımından genotip grupları arasındaki farklılıklar Ekim sıfat döneminde P
Koyun. Hamdani. Morkaraman. Karagül. Kuzulama sıklığı. Hormon
In the present study, the possibilities of three times lambing in two vears was aimed to investigate by using exogen hormone in Hamdani. Morkaraman ve Karagül Sheep.In this study. 2 vears old 28 and 4 vears old 12 Hamdani. 2 vears old 14 and 4 vears old 36 Morkaraman, 2 years old 10 and 4 years old 25 Karagül sheep used as animal material. Vaginal pessaries containing 40 mg FGA for days applied to the ali sheep in October 1998. in June 1999 and in February 2000 which were used as mating season in the present study. Furthermore. 500 IU PMSG injected to ali sheep just after removal vaginal pessaries. In this study. the time between two mating intervals were applied as 8 months. This 8 ınonths the time made of by pregnancy 5 months. lactation period 2 months and resting period 1 month. Fertility traits. survival and growth rate in the ewes body weight before mating were recorded after ali three mating periods. Oestrus. pregnancy. birth. lambing and twinning rate and litter size in October mating period in Hamdani Sheep were % 90.00. 67.50. 67.50. 67.50. 0.00 and 1.000 respectively. in Morkaraman were % 96.00. 90.00, 90.00. 104.00. 15.56 and 1.156 respectively. in Karagül were % 94.28. 91.43. 91.43. 97.14, 6.25 and 1.063 respectively; in June mating period in Hamdani sheep were % 90.00. 57.50. 57.50. 62.50. 8.70 and 1.087 respectively, in Morkaraman were % 94.00. 70.00. 66.00. 72.00. 9.09 and 1.091 respectively. in Karagül were % 91.43. 60.00. 60.00. 62.90. 4.76 and 1.048 respectively; in February mating period in Hamdani sheep were % 72.50, 32.50. 32.50, 32.50. 0.00 and 1.000 respectively. in Morkaraman were % 76.00, 52.00. 50.00. 54.00. 8.00 ve 1.080 respectively. in Karagül were % 74.29, 54.29. 51.43. 65.70. 27.78 and 1.278 respectively. Oestrus and litter size obtained from Hamdani, Morkaraman and Karagül sheep in ali three mating period were not statically different. Pregnancy and birth rates were statically signifıcant P< 0.01 between genotype groups in October mating. In terms of lamb rate. signifıcant differences were obtained only in October mating period P< 0.05 . Furthermore. in tems of birth types signifıcant differences P< 0.05 observed only in February Mating Period. Birth and 60lh days bady weight of the lambs born after October mating in Hamdani lambs were 4.20 and 17.79 kg respectively. in Morkaraman lambs were 4.03 and 17.53 kg respectively. in Karagül lambs 2.94 and 12.32 kg respectively. The same values in the lambs born after June mating in Hamdani lambs were 4.16 and 16.96 kg respectively, in Morkaraman lambs 3.82 and 16.13 kg respectively. in Karagül lambs 3.10 and 13.04 kg respectively. Birth and 601’ days body weight of the lambs born after February mating in Hamdani lambs were 4.30 and 16.08 kg respectively. in Morkaraman lambs were 4.02 and 14.74 kg respectively, in Karagül lambs were 2.87 and 9.77 kg respectively. In terms of birth and 601’’ days body weight of lambs in ali three mating period were statically signifıcant P< 0.01 among genotype groups. Survival rate of the lambs born after October mating period in Hamdani. Morkaraman and Karagül lambs were %100. 100 and 97.06 respectively. after June mating period were % 92.31. 92.59 and 91.30 respectively. after February mating period were % 92.31.92.59 and 91.30 respectively. Statically. survival rate of the lambs obtained after three mating periods were not signifıcant between genotype groups. When the research is completely considered. it was concluded tlıat programme of lambing three times in two years would be able to appyly to Hamdani. Morkaraman and Karagül sheep. Kev Words: Sheep. Hamdani. Morkaraman. Karagül. Lambing frequency. Hormone
Sheep. Hamdani. Morkaraman. Karagül. Lambing frequency. Hormone.
Birincil Dil | Türkçe |
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Bölüm | Araştırma Makalesi |
Yazarlar | |
Yayımlanma Tarihi | 1 Ocak 2006 |
Yayımlandığı Sayı | Yıl 2006 Cilt: 9 Sayı: 1 |