TY  - JOUR
EP  - 272
A1  - Tankouano, R.A.
A1  - Meteyake, H.
A1  - Oke, O.E.
A1  - Lawson-evi, P.
A1  - Tona, K.
SP  - 264
Y1  - 2024/09/25/
N2  - Chickens are sensitive to environmental challenges caused by temperature. The current study aimed to determine the effects of heat manipulation during embryonic development on the physiological responses of Goliath chickens. A total of 2000 hatching eggs from 48-week-old breeders were weighed, numbered, and randomly distributed equally into 4 incubators. Each incubator received 500 eggs (4 replicates of 125 eggs each). Eggs in two of the incubators were rotated hourly at a 45° angle and maintained at 37.8°C and 60 relative humidity (T0 groups). Between embryonic days (ED) 10 and 18 of incubation, the eggs from the other two incubators were heated to 38.5°C for 6 hours per day (T1 groups). The eggs were reweighed and candled, and viable eggs were moved to the hatching baskets at ED 18 of incubation. Hatching eggs were examined individually for hatching events every three hours during the final three days of incubation. On day 21, blood samples were collected from 12 chicks per group for hormonal and biochemical analyses. The evaluated blood parameters included Triiodothyronine (T3), T4 (thyroxine), cortisol, uric acid, lactate dehydrogenase, and total protein. At hatch, chicks were weighed and their quality (survival after hatching and performance standards) was evaluated. Data were collected on embryonic development, hatching window, hatching events, biochemical parameters, and hormonal concentrations. Results indicated that hatchability, chick?s weight, Triiodothyronine, and corticosterone were higher in the T1 group, compared to the control group. At hatch on day 21, the pipping muscle of chicks in the treated group (T1) was significantly heavier than that of the control group, while the embryonic mortality rate was significantly higher in the T0 group. In conclusion, applying heat treatment for 6 hours at 38.5°C from ED10-ED18 of embryogenesis increased significantly the hatching rate, the pipping muscle, and the chick?s weight in this study. © The Author(s) 2024
VL  - 14
UR  - https://www.scopus.com/inward/record.uri?eid=2-s2.0-85206342811&doi=10.36380%2fjwpr.2024.27&partnerID=40&md5=e353ce197ddb96d8bbe76907d617e2d1
KW  - Embryonic development; Physiology; Slow-growing broiler; Thermal manipulation; Tropical climate
ID  - eprints1140
SN  - 2322-455X
TI  - Effects of Thermal Manipulation During the Second Half of Incubation on Embryo Physiology, Hatching Parameters, and Quality of Broiler Chickens in Tropical Climate of Togo
IS  - 3
AV  - public
JF  - Journal of World's Poultry Research
PB  - Scienceline Publication, Ltd
N1  - Regional Centre of Excellence in Poultry Science, University of Lomé, Togo (CERSA/UL), 01, Lomé, B.P. 1515, Togo; Physiopathology, Bioactive Substances and Safety Research Unit (PSBI Unit), Faculty of Science, University of Lomé, P.O. Box 1515, Togo, Togo
ER  -