Table 4.
Residual feed intake of mixed-sex New Hampshire and Brown Leghorn heritage birds under ad libitum and restricted feed intake pair-fed treatments prior to and during pair feeding.
| Effect | RFI (kcal/d)1 | SEM |
|---|---|---|
| Period | ||
| Pre-pair-feeding | 17.200 | 2.833 |
| Pair-feeding | −4.878 | 3.609 |
| FL2 | ||
| AL | 12.660 | 4.050 |
| Res | −0.338 | 4.445 |
| Sex | ||
| Male | 13.564 | 4.758 |
| Female | −1.241 | 3.678 |
| Strain3 | ||
| BL | −0.728 | 4.367 |
| NH | 13.050 | 4.134 |
| P-value | ||
| Period | <0.0001 | |
| FL | 0.045 | |
| Sex | 0.025 | |
| Strain | 0.035 | |
| FL × Sex | 0.055 | |
| FL × strain | 0.372 | |
| Strain × Sex | 0.380 | |
| FL × Period | 0.447 | |
| Strain × Period | 0.951 | |
| Sex × Period | 0.765 | |
| FL × Strain × Sex | 0.390 | |
| FL × Strain × Period | 0.008 | |
| FL × Sex × Period | 0.812 | |
| Sex × Strain × Period | 0.042 | |
| FL × Sex × Strain × Period | 0.839 | |
1
RFI: Residual feed intake.
2
FL: Feeding level; AL: Ad libitum; Res: Restricted from 12-17 wk of age at 95% of the AL intake of a paired bird closest in BW.
3
BL: Brown Leghorn; NH: New Hampshire.