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    Improvement studies on mutton sheep for Marmara region conditions: I. fertility, lamb survival, and growth traits of lambs
    (SCIENTIFIC TECHNICAL RESEARCH COUNCIL TURKEY-TUBITAK, 2011) Ceyhan, Ayhan; Sezenler, Tamer; Erdogan, Ismail; Torun, Osman
    The present study was conducted to compare the fertility of ewes, the survival rates, and the growth performance of lambs that were crossbred by mating German Black-Headed Mutton (GBM) rams with Kivircik ewes. The average lambing rates of the GBM x K(F(1)), Bandirma-I and Bandirma-II genotype, and Kivircik ewes were 80.00%, 75.73%, 76.78%, and 83.72%, respectively. The differences in lambing rates between the genotypes were significant (P < 0.01). The genotypes had a significant effect on litter size at birth, but not on fecundity. The differences in lambs' survival rates between the genotypes were significant (P < 0.05). The birth weight (BW), weaning weight (WW), and yearling live weight (YLW) of the lambs were 3.77 kg, 34.11 kg, and 43.71 kg for the GBM x K (F(1)); 3.74 kg, 32.98 kg, and 44.91 kg for the Bandirma-I; 3.73 kg, 33.18 kg, and 45.71 kg for the Bandirma-II; and 3.45 kg, 30.92 kg, and 42.22 kg for the Kivircik lambs. The results of this study showed that crossbreeding between the GBM and Kivircik breed did not significantly increase lamb production. However, crossbred lambs did not have signifi cant survival problems when compared to native Kivircik lambs and had higher growth performance than purebred Kivircik lambs.
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    Reproductive Performance and Lamb Growth Characteristics of Ramlic Sheep
    (KAFKAS UNIV, VETERINER FAKULTESI DERGISI, 2010) Ceyhan, Ayhan; Sezenler, Tamer; Yildirir, Mesut; Erdogan, Ismail
    This study was carried out to investigate some reproductive and lamb growth performance of Ramlic sheep in 2005, 2006, 2007 and 2008 years. The effect of year was found significant on fecundity and litter size of the ewes. The average fecundity, litter size and lamb survival rate of Ramlic ewes were 0.79, 1.13 and, 94.9%, respectively. The birth weight (BW), weaning weight (WW) and six month live weight (SMLW) for male and female lambs were 4.63 kg and 4.20 kg, 30.92 and 26.94 kg, 37.40 and 33.21 kg, respectively. The effect of age of dam, year, birth type and sex were significant on BW, WW and ADWG of lambs. The average daily weight gain of lambs at weaning was 286.88 g and male and female lambs were 303.62 g and 270.13 g, respectively.
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    The comparison of some reproduction traits and lambs growth performance of ex situ and in situ conserved Kivircik Sheep
    (ELSEVIER SCIENCE BV, 2014) Sezenler, Tamer; Ceyhan, Ayhan; Yildirir, Mesut; Erdogan, Ismail
    The objective of this study is to compare the reproductive performance of the ewes, the lambs' growth characteristics, and the variable costs in the sheep enterprises for ex situ and in situ conserved Kivircik sheep flocks. In total, 1841 ewes were included in the study. The ex situ Kivircik sheep flock had 929 ewes and the in situ Kivircik sheep flock had 912 ewes and their 1864 lambs were born in the months of January and February from 2007 to 2011. The lambing rates of the in situ and the ex situ flocks were 83.9% and 74.7% (P < 0.01), respectively, the differences in the results were significant between the conservation types. The fecundity of the in situ and the ex situ flocks was 1.1 and 1,0 lambs (P < 0.01), and litter size was the same (1.3, P > 0.05). The least squares means of the birth weight, the weaning weight at the 90th day of the lambs, and the post-weaning daily live weight gain of the in situ and ex situ conserved lambs were 4.2 and 3.7 kg (P < 0.01), 25.4 and 24.9 kg (P < 0.01), and 234 and 234.3 g/day (P > 0.05), respectively. The average mean survival rate of the in situ and the ex situ conserved lambs were 96.2% and 90.0%, respectively, and differences were significant (P < 0.01) between the conservation types. In the ex situ sheep enterprises, proportional profit was 0.62, in other words, each 100(sic) expense corresponds to a loss of 38(sic). However, for the in situ sheep enterprise, this ratio was 1.17, meaning that each 100 expense corresponds to a profit of 17(sic). The present study demonstrated that the in situ conserved Kivircik sheep had higher growth performance, higher lamb survival rate and was more profitable than the ex situ conserved Kivircik sheep. (C) 2013 Elsevier B.V. All rights reserved.