Table 1.
Effect of in ovo feeding of a commercial product containing canthaxanthin at 17.5 d of embryo development on hatchability and hatch window1 of broiler chicks.
| Items | Commercial product containing canthaxanthin (mg/0.5 mL/egg) |
||||||
|---|---|---|---|---|---|---|---|
| 0.00 | 0.35 | 0.45 | 0.55 | 0.65 | SEM | P-value | |
| Hatching/total (%) | 83.44a | 59.15a,b | 50.00b,c | 32.14c | 30.35c | 1.22 | <0.0001 |
| Hatching/fertile (%) | 89.82a | 64.30a,b | 54.32b,c | 34.93c | 32.99c | 1.34 | <0.0001 |
| Hatch window (h) | 20.00b | 26.50a | 28.50a | 24.00a | 26.50a | 1.25 | 0.0334 |
a–cMeans within a row with different superscript letters are different by Tukey test (P < 0.05).
1
Hatching window: period (h) between the first and the last chick that hatched in the basket.