Improving duckling hatchability and quality by optimization of egg turning angle during incubation
文献类型： 外文期刊
作者： Chen, Fang 1 ; Zhu, Biwen 1 ; Guo, Binbin 1 ; Dai, Zichun 1 ; Ying, Shijia 1 ; Huang, Yunmao 3 ; Shi, Zhendan 1 ;
作者机构： 1.Jiangsu Acad Agr Sci, Key Lab Protected Agr Engn Middle & Lower Res Yang, Minist Agr, Nanjing 210014, Peoples R China
2.Jiangsu Acad Agr Sci, Inst Anim Sci, Lab Anim Improvement & Reprod, Nanjing 210014, Peoples R China
3.Zhongkai Univ Agr & Engn, Coll Anim Sci, Guangzhou 510000, Peoples R China
关键词： duck; egg turning angle; incubation; hatchability; growth performance
期刊名称：POULTRY SCIENCE （ 影响因子：3.8； 五年影响因子：4.1 ）
ISSN： 0032-5791
年卷期： 2024 年 103 卷 10 期
页码：
收录情况： SCI
摘要： Egg turning in incubation is crucial to the development of embryos and hatching performance. We aimed to develop a high performance duck egg incubation technique by enlarging and changing egg turning angles. Increasing turning angle from 45 to 75 degrees did not affect the embryo early mortality during the first 15 d of incubation, which ranged from 3.5 to 4.0%, but accelerated chorioallantoic membrane (CAM) development by 17 h, and significantly (P < 0.01) reduced the late mortality from 9.4 f 0.98% to 5.31 +/- 0.63%. As the result, fertile egg hatchability increased from 91.03 +/- 0.97% to 94.64 +/- 0.61% (P < 0.05), so was healthy duckling rate from 87.24 +/- 1.17% to 92.08 +/- 0.55% (P < 0.05), and duckling live weight from 60.74 +/- 0.63 g to 63.15 +/- 0.35 g < Changing turning angle from 75 degrees to 60 degrees during incubation d 15 to 25 further reduced late embryo mortality to 3.88 +/- 0.47 and increased hatchability to 96.58 +/- 0.68%. This changing angle turning hatched ducklings exhibited the highest growth performance during rearing than those hatched by 45 and 75 degrees egg turning. The enhanced growth rate was paralleled by upregulations of somatotropic axis genes mRNA expression levels of the hypothalamus GHRH, , liver GHR and IGF-1 during embryo incubation and duckling rearing. In conclusion, a changing angle egg turning incubation technique, 75 degrees in the first 15 d and 60 degrees thereafter, can enhance CAM development, upregulate somatotropic axis genes expressions, and can maximally improve embryo livability, duckling hatchability and growth performance.
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