Thermal manipulation on Japanese quail embryo; An embryological study | ||
| Veterinary Medical Journal (Giza) | ||
| Article 10, Volume 66, Issue 1, 2020, Pages 115-123 PDF (372.05 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/vmjg.2020.157999 | ||
| Authors | ||
| Saad El-Shater1; Karim Khalil* 1; Hamdy Rizk1; Hisham Abdelrahman2; Elsayed Khalifa1 | ||
| 1Anatomy and Embryology Department, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt. | ||
| 2Department of Veterinary Hygiene and Management, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt. | ||
| Abstract | ||
| Japanese quail embryo thermal manipulation was known as an effective protocol in improving post-hatching growth performance parameters and thermotolerance acquisition which alleviates heat stress during rearing. The current study aimed to evaluate the effects of high incubation temperature protocols (41°C for 3 hours / 3 successive days) during early and late embryogenesis on quail embryo performance. Two hundreds of quail eggs was incubated at 37.7°C and 55% RH as control group. Two thermally treated groups (two hundreds eggs for each) were incubated intermittently at 41°C and 65% RH intermittently (3 hours / day): The early embryonic group was thermally treated during embryonic days (ED 6 – 8), while the late embryonic group was thermally treated during ED 12 –14. These thermal manipulation protocols did not affect embryo development, yolk consumption, hatchability and hatched chick quality. | ||
| Keywords | ||
| Coturnix japonica; High incubation temperature; Embryogenesis; Chick quality | ||
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