Manipulation of incubation temperatures to increase cold resistance of broilers: Influence on embryo development, organ weights, hormones and body composition
Küçük Resim Yok
Tarih
2012
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Japan Poultry Science Association
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
Eighteen hundred eggs obtained from Ross broiler breeders at 32 and 48 wk age were randomly assigned to two incubation treatments: T1 eggs were incubated at 37.6°C throughout, while for T2 eggs the incubation temperature was reduced 1°C for 6 h daily at embryonic ages (EA) 10 to 18. Embryo and organ weights and body composition were measured at EA14, 19 and day of hatch (DOH). Hatchability and hatching duration, as well as serum triiodothyronine (T3), thyroxin (T3), and triglycerides were measured at DOH. T1 eggs contained less water than T2 eggs at EA18. Hatchability was lower and the incubation period was 4.2 h longer for T2 than T1 chicks. On DOH for older breeders chick weights and serum T3 levels were higher for T2 than T1; however, those from younger breeders were similar at both incubation temperatures. These results may show a beneficial effect of T2 treatment in older breeders. Incubation temperature did not affect triglycerides levels. On DOH, higher body lipids content of T2 than T1 chicks may contribute to their resistance to cold post hatch. © 2012, Japan Poultry Science Association.
Açıklama
Anahtar Kelimeler
Body composition, Embryo, Hatchability, Incubation temperature, Temperature resistance
Kaynak
Journal of Poultry Science
WoS Q Değeri
Scopus Q Değeri
Q2
Cilt
49
Sayı
2
