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Table 4 The effect of TC (42 °C for 6 h; posthatch day 28) during 4 time terminals (at the beginning and after 1, 3 and 5 h of TC) on selected enzymes activities of broiler chicks subjected to different TM protocols at ED 12–18 (n = 5)

From: Biochemical and molecular investigation of thermal manipulation protocols during broiler embryogenesis and subsequent thermal challenge

Parameters

Groups

Treatments

Control

TM1

TM2

TM3

TM4

ALT

TN

5.5 ± 1.7 aw

6.5 ± 1.9 aw

5.5 ± 0.7 aw

7.0 ± 1.4 aw

6.5 ± 0.7 aw

 

TC1

6.0 ± 2.4 aw

8.5 ± 2.1 aw

8.0 ± 1.9 aw

9.5 ± 1.5 aw

8.5 ± 1.5 aw

 

TC3

7.5 ± 0.4 aw

9.0 ± 1.7 aw

7.5 ± 0.7 aw

8.5 ± 0.7 aw

8.5 ± 1.6 aw

 

TC5

5.5 ± 2.1 aw

6.0 ± 1.6 aw

8.5 ± 1.5 aw

9.0 ± 1.6 aw

9.5 ± 1.7 aw

AST

TN

80.5 ± 0.7 aw

75.8 ± 4.1 aw

76.5 ± 3.5 aw

83.5 ± 2.3 aw

83.5 ± 6.4 aw

 

TC1

80.5 ± 6.4 aw

76.5 ± 7.6 aw

80.0 ± 1.4 aw

83.5 ± 2.0 aw

81.0 ± 8.5 aw

 

TC3

85.0 ± 2.8 aw

70.0 ± 1.2 aw

77.0 ± 1.4 aw

72.0 ± 2.9 aw

76.0 ± 4.2 aw

 

TC5

87.5 ± 7.7 aw

80.5 ± 4.9 aw

77.5 ± 6.4 aw

70.0 ± 3.2 aw

80.5 ± 3.5 aw

GGT

TN

10.5 ± 3.5 aw

11.5 ± 0.7 aw

11.5 ± 0.7 aw

12.5 ± 0.7 aw

11.0 ± 1.4 aw

 

TC1

11.5 ± 0.7 aw

11.5 ± 0.7 aw

11.8 ± 0.6 aw

10.5 ± 2.1 aw

12.5 ± 0.7 aw

 

TC3

11.5 ± 1.0 aw

12.0 ± 0.7 aw

12.5 ± 0.7 aw

12.0 ± 1.4 aw

12.5 ± 0.7 dw

 

TC5

11.5 ± 0.9 aw

9.5 ± 2.1 aw

12.5 ± 0.5 aw

10.0 ± 1.2 aw

11.0 ± 0 .9 aw

CK

TN

1276 ± 79aw

1277 ± 100 aw

1394 ± 98 aw

1239 ± 99 aw

1293 ± 141 aw

 

TC1

1202 ± 80 aw

1314 ± 108 aw

1182 ± 150 aw

1135 ± 161 aw

1205 ± 138 aw

 

TC3

1310 ± 100 aw

1410 ± 100 aw

1253 ± 138 aw

1239 ± 163 aw

1285 ± 124 aw

 

TC5

1239 ± 95 aw

1307 ± 150 aw

1257 ± 96 aw

1205 ± 144 aw

1265 ± 90 aw

  1. Control 37.8 °C, TM 1 Thermal manipulation at 38.5 °C for 18 h, TM 2 Thermal manipulation at 39 °C for 18 h, TM 3 Thermal manipulation at 39.5 °C for 18 h, TM 4 Thermal manipulation at 40 °C for 18 h, TC Thermal challenged
  2. a–d within rows, means ± SD with different superscripts differ significantly (P < 0.05)
  3. w-z Between naïve and TC chicks within a parameter, means ± SD with different superscripts differ significantly (P < 0.05)