Table 1.
Effects of the application of colored photoperiodic light during incubation on egg weight loss (EWL) (%), the weights of embryo (% of egg weight) and organs (g kg−1), embryo length (mm), the diameter of embryo (mm) and eyeballs (mm), and the relative embryo diameter (mm g−1) and length (mm g−1) at embryonic d (ED) 10, 14 and 18 of incubation in Ross 308 broiler embryos.
| Item | n1 | EWL | Relative embryo weight2 | Yolk weight3 | Embryo diameter | Relative embryo diameter4 | Embryo length | Relative length5 | Eyeball diameter | Relative heart weight6 |
|---|---|---|---|---|---|---|---|---|---|---|
| Variation source (ED10) | ||||||||||
| Dark | 7 | 6.53 | 4.50 | - | 31.0 | 10.76 | - | - | 8.2 | 8.36 |
| Blue | 8 | 7.07 | 4.41 | - | 30.8 | 10.99 | - | - | 8.2 | 8.03 |
| Red | 8 | 6.90 | 4.44 | - | 30.7 | 10.95 | - | - | 8.1 | 8.35 |
| White | 8 | 6.54 | 4.39 | - | 30.8 | 10.93 | - | - | 8.1 | 8.36 |
| SEM | 0.211 | 0.048 | - | 0.31 | 0.149 | - | - | 0.05 | 0.157 | |
| Lighting treatment | 0.237 | 0.443 | - | 0.865 | 0.745 | - | - | 0.372 | 0.379 | |
| Block | 0.686 | <0.0001 | - | 0.0001 | <0.0001 | - | - | <0.0001 | 0.001 | |
| Variation source (ED14) | ||||||||||
| Dark | 7 | 9.38 | 22.14 | 18.6 | 53.9 | 3.80 | 104.8 | 7.4 | 10.9 | 7.62 |
| Blue | 8 | 8.92 | 22.53 | 18.6 | 54.9 | 3.78 | 103.5 | 7.1 | 10.9 | 7.67 |
| Red | 8 | 9.51 | 22.26 | 18.5 | 53.9 | 3.79 | 103.0 | 7.2 | 10.8 | 7.76 |
| White | 8 | 9.45 | 22.39 | 18.6 | 54.6 | 3.78 | 103.5 | 7.2 | 11.0 | 7.62 |
| SEM | 0.220 | 0.314 | 0.20 | 0.87 | 0.070 | 0.75 | 0.10 | 0.07 | 0.108 | |
| Lighting treatment | 0.248 | 0.847 | 0.986 | 0.816 | 0.994 | 0.457 | 0.319 | 0.590 | 0.753 | |
| Block | 0.001 | <0.0001 | <0.0001 | 0.901 | 0.072 | <0.0001 | <0.0001 | 0.003 | 0.002 | |
| Variation source (ED18) | ||||||||||
| Dark | 7 | 11.86 | 46.69 | 13.4 | 56.7 | 1.89 | 159.1 | 5.3 | 11.9 | 7.29 |
| Blue | 8 | 11.81 | 46.57 | 13.6 | 56.8 | 1.90 | 157.4 | 5.2 | 11.9 | 7.49 |
| Red | 8 | 12.23 | 46.19 | 13.3 | 57.1 | 1.92 | 158.8 | 5.3 | 11.9 | 7.47 |
| White | 8 | 11.69 | 46.69 | 13.3 | 57.3 | 1.91 | 159.3 | 5.3 | 11.9 | 7.45 |
| SEM | 0.300 | 0.270 | 0.25 | 0.54 | 0.02 | 0.77 | 0.03 | 0.06 | 0.084 | |
| Lighting treatment | 0.626 | 0.537 | 0.782 | 0.886 | 0.861 | 0.320 | 0.309 | 0.992 | 0.415 | |
| Block | 0.012 | <0.0001 | <0.0001 | 0.037 | <0.0001 | <0.0001 | <0.0001 | 0.0002 | 0.002 | |
Number of experimental units. Experimental unit = 8 eggs per incubator per sampling day.
Relative embryo weight = Embryo weight/egg weight x 100%.
Yolk = Yolk weight/day 0 egg weight x 100%.
Relative diameter to embryo weight = Embryo diameter/embryo weight x 100%.
Relative length to embryo weight = Embryo length/embryo weight x 100%.
Relative heart weight = Heart weight/embryo weight x 100%.