Comparison of Hen Performance and Mortality of Commercial Layer Flocks by Strain and Cage Type

Year 2023, , 530 - 540, 31.12.2023

Sema Kaba , Zehra Bozkurt

https://doi.org/10.30607/kvj.1354918

Abstract

The study aimed to compare the effects of strain and cage type on egg production, mortality and the rates of dirty eggs and broken eggs in commercial flocks of laying hens. The study was conducted on four commercial flocks of layers in medium-sized poultry farms in the city of Afyonkarahisar. Two white (Hy-Line and Super Nick) and two brown (Nick Brown) layer flocks were housed in conventional cages and enrichable cages. The laying flocks were visited weekly, and the egg production and the number of dead birds, dirty eggs, and broken eggs were collected on a daily basis from flock records between 19 and 56 weeks of age. Both strain and cage type had a significant effect on hen-day and hen-housed egg production. The brown strains (2.74%) and hens housed in conventional cages (2.61%) had higher mean egg production. The effect of strain on weekly mortality became insignificant after 32 weeks of age, while the highest mortality rates were observed in the enrichable cages. The weekly rates of dirty eggs and broken eggs showed significant differences between the groups of strains and cage type. The effects of strain x cage type interactions on egg production and on the rates of dirty eggs and broken eggs were found to be significant. White and brown laying hens in conventional cages had higher egg production than the hens kept in enrichable cages. In conclusion, brown strains had higher egg production than white strains and enrichable cages had lower egg production and higher mortality, as well as dirty and broken eggs.

Keywords

Cage type, Dirty and broken eggs, Egg production, Mortality, Strain

Ethical Statement

Yazarlar bu yazı için gerçek, potansiyel veya algılanan çıkar çatışması olmadığını beyan etmişlerdir. Bu araştırma ilk yazarın yüksel lisans tezinden özetlenmiştir. Tezin ilk bölümü diğer bir dergide yayınlanacaktır.

Supporting Institution

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Project Number

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Thanks

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Genotip ve Kafes Tipine Göre Ticari Yumurtacı Sürülerde Tavuk Performansı ve Ölüm Oranlarının Karşılaştırılması

Abstract

Bu araştırmada ticari yumurtacı tavuk sürülerinde genotip ve kafes tipinin yumurta verimi, ölüm oranı ile kirli ve kırık yumurta oranları üzerine etkilerinin karşılaştırılması amaçlanmıştır. Araştırma Afyonkarahisar'daki orta ölçekli kanatlı işletmelerinde bulunan dört ticari yumurtacı tavuk sürüsünde yürütülmüştür. İki beyaz (Hy-line ve Super Nick) ve iki kahverengi (Nick Brown) yumurtacı sürü geleneksel ve zenginleştirilebilir kafeslerde barındırılmıştır. Yumurtacı sürüler 19-56 haftalık yaş döneminde haftalık olarak ziyaret edilmiş ve günlük yumurta üretimi, ölen tavuk sayısı ile kirli ve kırık yumurta sayıları çiftlik kayıtlarından toplanmıştır. Genotip ve kafes tipi tavuk-gün ve tavuk-kümes (%) yumurta üretimini önemli ölçüde etkilemiştir. Kahverengi genotiplerin (%2.74) ve geleneksel kafeslerde barındırılan tavukların (%2.61) ortalama yumurta üretimi daha yüksek bulunmuştur. En yüksek ölüm oranları zenginleştirilebilir kafeslerde gözlenirken 32 haftalık yaştan sonra genotipin haftalık ölüm oranlarına etkisi önemsiz hale gelmiştir. Haftalık kirli ve kırık yumurta oranları genotip ve kafes tipi grupları arasında önemli derecede farklılık göstermiştir. Genotip x kafes tipi interaksiyonlarının yumurta üretimi, kirli ve kırık yumurta oranlarına etkisi önemli bulunmuştur. Zenginleştirilebilir kafeslerde barındırılanlara göre geleneksel kafeslerdeki beyaz ve kahverengi yumurtacı tavukların yumurta üretimi daha yüksek bulunmuştur. Sonuç olarak, kahverengi genotiplerin beyaz genotiplere göre önemli derecede daha yüksek yumurta üretimine sahip olduğu, zenginleştirilebilir kafeslerde barındırılan tavukların yumurta üretiminin daha düşük, ölüm oranı ile kirli ve kırık yumurta oranlarının daha yüksek olduğu belirlenmiştir.

Keywords

Genotip, Kafes tipi, Kirli ve kırık yumurta, Ölüm oranı, Yumurta verimi

Project Number

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