Effects of different egg turning frequencies on incubation efficiency parameters
| Autor: | Gabriel da Silva Oliveira, Jullyana Carvalho Rodrigues, Sheila Tavares Nascimento, Vinícius Machado dos Santos |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Time Factors
Zygote Randomized block design Frango de corte Management and Production Biology Body weight Nesting Behavior Random Allocation 03 medical and health sciences Animal science embryo mortality Animals broiler breeder Incubation 030304 developmental biology lcsh:SF1-1100 0303 health sciences viability Body Weight 0402 animal and dairy science 04 agricultural and veterinary sciences General Medicine 040201 dairy & animal science Ovos - incubação turning frequency Frango de corte - embrião - mortalidade Female Animal Science and Zoology lcsh:Animal culture Gradual increase Chickens hatching result |
| Zdroj: | Poultry Science, Vol 99, Iss 9, Pp 4417-4420 (2020) Poultry Science Repositório Institucional da UnB Universidade de Brasília (UnB) instacron:UNB |
| ISSN: | 0032-5791 |
| Popis: | This study aimed to evaluate the effects of different egg turning frequencies on incubation efficiency parameters. Nine hundred sixty brown fertile eggs, with an average weight of 52.20 ± 0.85 g, from 38-week-old CJD (Carijó Pesadão) breeder hens were randomly distributed among 4 treatments before incubation. Each treatment corresponded to a turning frequency, being 24 (control), 12, 6, or 3 times per day, at an angle of 45°, until day 18 of incubation. The experimental design was a randomized complete block design with 4 treatments. Analysis of the incubation parameters was based on 6 replications per treatment. The eggs that were turned 12, 6, and 3 times per day exhibited a decrease in hatchability of the fertile eggs of 6.61, 15.51, and 19.70%, respectively, when compared with the control group (91.84 ± 2.73%). With a decrease in turning frequency, there was a gradual increase in early (2.84 ± 1.89 to 14.31 ± 1.82%) and late (3.57 ± 1.39 to 8.05 ± 1.24%) mortality rates. An egg turning frequency of 24 times per day during incubation provided high hatchability rates. In contrast, the turning frequencies of 12, 6, and 3 times per day showed significant losses in hatchability. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|