Table 3.
Effects of post-hatch heat stress for 7 days (post-hatch day (PD) 28 to 35) on cloacal temperature (TC), body weight (BW), and BW gain in broiler chickens subjected to embryonic thermal manipulation and controls.
| Normal Conditions | Heat Stress | |||
|---|---|---|---|---|
| (21 °C; RH 45%–52%) | (35 °C; RH 45%–52%) | |||
| Control | TM | Control | TM | |
| TC (°C) | 39.65 ± 0.28 a | 39.08 ± 0.21 b | 41.35 ± 0.24 c | 40.15 ± 0.26 d |
| BW (g) | ||||
| Day 0 (PD 28) | 1373.3 ± 51.3 a | 1675.7 ± 83.8 b | 1456.7 ± 82.8 a | 1704 ± 74.4 b |
| Day 7 (PD 35) | 1847.9 ± 108.1 a | 2108.8 ± 95.8 b | 1645 ± 40.6 c | 1930 ± 50.2 d |
| BW gain (g) | 474.6 ± 70.9 a | 433 ± 39.1 a | 188.3 ± 47.3 b | 226 ± 34.7 b |
a–d within the same row, means ± SD with non-identical superscripts are significantly different.