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This study was conducted to determine the genetic parameters of internal and external quality traits of Japanese quail eggs. Two statistical models were used in the calculation of genetic parameters and variance components. While 286 eggs were used based on model 1, 1,524 eggs were used based on model 2. Genetic parameters of the first eggs were calculated with direct genetic effect included in the analysis as random factors by using model 1. Model 2 was used for all eggs (5 to 6 eggs from each hen for six rearing groups). As different from model 1, their permanent environmental effects were also included in the model 2. Heritability of egg weight, egg length, egg width, shape index, shell weight, shell thickness, and shell ratio among the external quality traits of the eggs was respectively found to be 0.44, 0.53, 0.51, 0.70, 0.19, 0.16, and 0.05, respectively, according to model 1. These values were found to be 0.46, 0.40, 0.74, 0.48, 0.60, 0.28, and 0.21, respectively, according to model 2. Yolk weight, yolk diameter, yolk height, yolk index, yolk ratio, albumen weight, albumen height, albumen ratio, and Haugh unit values among the internal quality traits of the egg were found to be 0.22, 0.32, 0.02, 0.16, 0.19, 0.34, 0.19, 0.17, and 0.17, respectively, according to model 1. These internal quality traits were found to be 0.27, 0.18, 0.38, 0.06, 0.20, 0.41, 0.15, 0.15, and 0.12, respectively, according to model 2. Consequently, in this study, strong genetic correlations were detected between albumen height and Haugh unit, and also between albumen height and albumen weight. Additionally, a high and positive correlation was observed between some yolk traits (yolk weight and diameter) and albumen traits (weight and height). All these genetic correlations can be used to improve egg quality with a selection according to albumen weight.

SummaryThis study was conducted to determine effect of different fattening systems on fattening performance and body measurements of Hemsin male lambs. The materials of the study were consisted 39 male lambs weaned at 3 months of age (approximately live weight of 23 kg). In this study, Hemsin lambs were used in three group of extensive (n=13), semi-intensive (n=13) and intensive (n=13). The experiment was conducted for 90 days. Final live weights of groups of extensive, semi-intensive and intensive were 33.32, 41.16 and 42.09 kg, respectively, and for daily live weight gain (DLWG) were 121.11, 201.89 and 213.00 g, respectively. For semi-intensive and intensive of group, feed conversion ratios were 3.44 and 5.35 kg, respectively. As a result, intensive and semi-intensive groups of fattening performance were higher than that of extensive group. The differences among intensive and semi-intensive groups of fattening performance were not statistically significant (P>0.05). The results of this study suggest that semi-intensive group might be appropriate for fattening male Hemsin lambs. Hemsin lambs had a generally similar or lower fattening performance compared to local sheep breeds. Keywords: Hemsin lamb, Fattening systems, Fattening performance, Body measurements Hemşin Erkek Kuzularında Farklı Besi Sistemlerinin Besi Performansı ve Vücut Ölçülerine Etkisi ÖzetBu araştırma, Hemşin erkek kuzularında besi performansı ve vücut ölçülerine farklı besi sistemlerinin etkisini belirlemek için yapılmıştır. Araştırmanın hayvan materyalini, 3 aylık yaşta sütten kesilmiş, 39 baş Hemşin erkek kuzu oluşturmuştur (Yaklaşık 23 kg canlı ağırlığında). Araştırmadaki kuzulara ekstansif (n=13), yarı entansif (n=13) ve entansif (n=13) olmak üzere 3 farklı besi yapılmıştır. Araştırma 90 günde tamamlanmıştır. Ekstansif, yarı entansif ve entansif besi gruplarında besi sonu canlı ağırlıkları sırasıyla 33.32, 41.16 ve 42.09 kg, günlük canlı ağırlık artışları sırasıyla 121.11, 201.89 ve 213.00 g olarak belirlenmiştir. Yarı entansif ve entansif besi gruplarında yemden yararlanma oranları ise sırasıyla 3.44 ve 5.35 kg olarak tespit edilmiştir. Sonuç olarak, entansif ve yarı entansif besi gruplarının besi performansı, ekstansif besi grubundan yüksek bulunmuştur. Besi performansı bakımından entansif ve yarı entansif besi grupları arasında istatistiki bir fark bulunmamıştır (P>0.05). Bu sonuçlara göre Hemşin erkek kuzularında yarı entansif besinin en uygun olacağı ortaya çıkmıştır. Besi performansı bakımından, genel olarak Hemşin erkek kuzuların diğer yerli ırklara göre benzer ve biraz düşük olduğu söylenebilir.

1. Genetic parameters of slaughter and carcase traits were estimated for 5-week-old Japanese quail reared under the one-to-one sire and dam pedigree recorded system. Data were analysed using restricted maximum likelihood (REML) with relationship matrix. Records of 1244 animals from 119 sires and 156 dams were analysed. 2. An individual animal model was used which had the animals' genetic effect as the only random factor. Heritability and standard errors of slaughter, cold carcase, breast, leg, wing, others, liver weights and dressing percentage were 0·40 ± 0·07, 0·55 ± 0·07, 0·58 ± 0·07, 0·54 ± 0·07, 0·49 ± 0·07, 0·42 ± 0·06, 0·13 ± 0·04 and 0·21 ± 0·05 respectively. Moderate to high heritability for most of the studied traits suggested that selection to increase or decrease these traits will be successful. 3. The strongest genetic correlation was found between slaughter, carcase and breast weights (0·97-0·87). These high genetic correlations provide an opportunity to select for breast weight on the basis of 5-week weight. 4. It can be concluded that carcase weight and 5-week weight of quail can be included in a selection index to increase the weights of valuable carcass parts.

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Abstract. This study was conducted to determine effect of different fattening methods on slaughter and carcass characteristics of Tuj male lambs. Tuj lambs (n=18) were used in three groups with six lambs in each group. Group 1 was only grazed on the pasture and group 2 was supplemented 200 g concentrate with the pasture. Group 3 was supplemented 400 g concentrate with the pasture. Lambs were grazed on the pasture for 8 h/day. Concentrate with 18.5% CP and 2650 kcal/kg ME was fed to lambs in addition to pasture. At the end of three months of experiment, the lambs were slaughter and carcass characteristics and carcass measurements were evaluated. Slaughter weights of group 1, 2 and 3 were 44.10, 44.86 and 46.00 kg, respectively, and hot carcass weights were 20.66, 21.36 and 22.15 kg, respectively, hot dressing percentage 46.85, 47.56 and 47.64%, respectively. The differences between groups of slaughter and carcass characteristics and carcass measurements of lambs were not statistically significant (P>0.05). As a conclusion, supplementations of concentrate feed to grazing lambs on the pasture were no effect on slaughter and carcass characteristics and carcass measurement in lambs.

Citation of This ArticleÖnk K, Sarı M, Aksoy Y, Tilki M, Tufan T, Yılmaz İ: Effects of different fattening systems on fattening performance, slaughter and carcass characteristics of male Tuj lambs. Kafkas Univ Vet Fak Derg, 23, 109-115, 2017. DOI: 10.9775/kvfd.2016 AbstractThe purpose of this study were to determine effects of fattening systems on fattening performance (n=39) and slaughter and carcass characteristics (n=24) in male Tuj lambs. Three different fattening groups were formed as extensive (n=13), semi-intensive (n=13) and intensive (n=13). Lambs in the extensive group were grazed in pasture. In addition to pasture, concentrated feed was given to lambs in the semi-intensive group. High quality fodder and concentrated feed were given to those in the intensive group. The study was completed in 90 d. Final live weights of extensive, semi-intensive and intensive groups were 31.19, 41.22, and 40.56 kg (P<0.001), respectively, and for daily live weight gain were (DLWG) 117.52, 229.66, and 221.11 g (P<0.001), respectively. Feed conversion rates (FCR) were 3.05 and 5.16 respectively in the semi-intensive and intensive fattening. It was found that hot carcass weight was 13.41, 19.51, and 19.89 kg (P<0.001) in extensive, semi-intensive, and intensive fattening groups respectively. Hot carcass yield was 43.11, 46.95, and 49.77% (P<0.001) in extensive, semi-intensive, and intensive fattening groups respectively. Consequently; leg, foreleg, shoulder, neck, flank, and kidney percentages, and spleen and full stomach weights of lambs in the extensive group were higher than in semi-extensive and entensive groups. Although there was no statistical difference between semi-extensive and entensive groups in respect to fattening performance, slaugher weight, hot and cold carcass weights, entensive group was higher than the other groups in respect to hot and cold carcass yield. Keywords: Tuj lambs, Fattening systems, Fattening performance, Slaughter and carcass characteristics Farklı Besi Sistemlerinin Erkek Tuj Kuzularında Besi Performansı, Kesim ve Karkas Özelliklerine Etkisi ÖzetBu araştırma, erkek Tuj kuzularında besi sistemlerinin besi performansı (n=39), kesim ve karkas özelliklerine (n=24) etkisini belirlemek amacıyla yapılmıştır. Araştırmada ekstansif (n=13), yarı entansif (n=13)