Mahmoud Salah EL-TARABANY, Tamer Mohamed ABDEL-HAMID, Hesham Hosny MOHAMMED

Efects of cage stocking density on egg quality traits in Japanese quails

Bu çalışma değişik kafesleme yoğunluklarının iç ve dış yumurta kalitesi üzerine etkisini araştırmak, iç ve dış yumurta kalitelerinin fenotipik korelasyon katsayısını ölçmek amacıyla yapılmıştır. Çalışmada 14 haftalık toplam 216 bıldırcın kullanılmıştır. Hayvanlar rastgele olarak 3 gruba (60, 72 ve 84) ayrıldı. Her bir grup taban alanları sırasıyla 200, 167 ve 143 cm 2/bıldırcın olacak şekilde ayrıca 4 tekrarlı olmak üzere ayrıldı. Çalışma bulguları sonucunda 200 cm 2/bıldırcın olan grupta bıldırcınların daha ağır yumurta verdikleri (12,24 g), anlamlı derecede daha yüksek dış özellikler gösterdikleri; kabuk ağırlığı (1.27 g), kabuk oranı (%10.55), kabuk kalınlığı (0.23 mm) ve kabuk yoğunluğu (48.70 mg/cm 2) belirlendi. Benzer olarak iç kalite özellikleri; yumurta sarısı yüksekliği (10.72 mm), yumurta akı yüksekliği (5.67 mm), yumurta sarısı çapı (24.97 mm), yumurta sarısı indeksi (%43.49) ve Haugh birim (92.77) olarak belirlendi. Kabuk ağırlığı pozitif olarak yumurta sarısı yüksekliği (P

Bıldırcınlarda kafes yoğunluğunun yumurta kalitesi üzerine etkileri

This study was conducted to investigate the efects of diferent stocking densities on external and internal egg quality traits and to measure the phenotypic correlation coefficients between external and internal egg quality traits. Two hundred and sixteen birds of Japanese quail at 14 th week of age were used in this experiment. The birds were divided randomly into three groups, 60, 72 and 84. Each group subdivided into 4 replicates, where the cages foor spaces were 200, 167 and 143 cm 2/bird; respectively. The obtained results revealed that birds housed at 200 cm 2/bird laid heavier egg weight (12.24 g), with significant (P<0.05) higher external quality traits, including shell weight (1.27 g), eggshell ratio (10.55%), shell thickness (0.23 mm) and egg shell density (48.70 mg/cm 2). Similarly, internal quality traits, including yolk height (10.72 mm), albumen height (5.67 mm), yolk diameter (24.97 mm), yolk index (43.49%) and Haugh unit (92.77). Shell weight positively correlated with yolk height (P<0.01), albumen height (P<0.01), albumen weight (P<0.05) and haugh unit (P<0.01). It was concluded that, housing Japanese quail at low cage foor space associated with depression in external and internal egg quality traits. Moreover there is an economical hazard of housing quails at cage foor space lower than 200 cm 2/bird.

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