Table 3 Characterization of tissues and organs in lambs with high, medium, and low residual feed intake (RFI).

42

54

41

Heart

Weight, g

158.75

160.25

161.55

2.17

0.883

Percentage, %

0.40

0.39

0.40

0.00

0.186

Liver

Weight, g

633.31^b

694.12^a

696.39^a

8.87

0.005

Percentage, %

1.62^b

1.68^ab

1.73ª

0.02

0.056

Spleen

Weight, g

51.40

52.71

52.62

0.66

0.681

Percentage, %

0.13

0.15

0.13

0.00

0.547

Lung

Weight, g

375.87^b

405. 41^ab

408.04^a

5.27

0.022

Percentage, %

0.98

1.02

0.98

0.01

0.192

Kidney

Weight, g

110.12^a

116.35^b

114.74^b

0.82

0.056

Percentage, %

0.28

0.28

0.28

0.00

0.067

Perirenal fat

Weight, g

191.67

210.43

218.77

6.61

0.263

Percentage, %

0.50

0.52

0.55

0.02

0.392

Head & feet

Weight, g

2.95

3.01

3.05

0.03

0.315

Percentage, %

7.57

7.34

7.63

0.06

0.120

Skin & wool

Weight, g

4.70

4.84

4.76

0.06

0.655

Percentage, %

11.99

11.69

11.83

0.11

0.517

Testis

Weight, g

234.10^a

210.92^a

158.43^b

8.15

0.001

Percentage, %

0.60^a

0.51^b

0.40^b

0.02

0.001

TWS³

Weight, g

900.25^b

956.52ª

950.51^a

7.85

0.004

Percentage, %

2.28

2.34

2.32

0.01

0.246

TWI⁴

Weight, g

1188.71^b

1254.63^a

1254.87^a

9.90

0.007

Percentage, %

3.06

3.16

3.16

0.02

0.331