Table 1.
Mean weight in PC and chickens only incubated (N-PC), in grams, in males and females, from 1 to 28 d of age.
| Age (d) | PC |
N-PC |
Sex |
Treatment |
||||||
|---|---|---|---|---|---|---|---|---|---|---|
| m | f | m | f | χ2 | df | P-value | χ2 | df | P-value | |
| 1 | 42.2 ± 0.7 (n = 20) | 42.4 ± 0.7 (n = 20) | 44.8 ± 0.8 (n = 19) | 43.4 ± 0.7 (n = 20) | 0.611 | 1 | 0.434 | 5.648 | 1 | 0.017 |
| 7 | 72.1 ± 2.0 (n = 9) | 68.9 ± 2.1 (n = 8) | 72.3 ± 1.8 (n = 11) | 66.9 ± 2.7 (n = 5) | 3.598 | 1 | 0.058 | 0.086 | 1 | 0.770 |
| 14 | 124.4 ± 1.8 (n = 35) | 119.2 ± 1.9 (n = 34) | 128.9 ± 1.8 (n = 37) | 123.4 ± 2.2 (n = 25) | 7.674 | 1 | 0.006 | 5.232 | 1 | 0.022 |
| 21 | 203.8 ± 3.1 (n = 32) | 184.0 ± 2.7 (n = 42) | 211.2 ± 3.0 (n = 36) | 199.0 ± 3.6 (n = 25) | 27.547 | 1 | <0.001 | 12.504 | 1 | <0.001 |
| 28 | 303.6 ± 3.9 (n = 35) | 268.6 ± 3.7 (n = 38) | 306.2 ± 3.8 (n = 36) | 278.3 ± 4.6 (n = 25) | 62.988 | 1 | <0.001 | 2.143 | 1 | 0.143 |
Abbreviations: f, females; m, males; N-PC, non-processed chickens; PC, hatchery-processed chickens.