Skip to main content

Table 5 Means and standard errors (M ± SE) of live animal performance and carcass characteristics of prime lamb progeny from different sire breeds

From: Performance and carcass characteristics of Australian purebred and crossbred lambs supplemented with Rice Bran

 

Dorset

White Suffolk

Merino

P value

Initial BW (kg)

37.3 ± 1.1

36.7 ± 0.6

31.8 ± 0.9

0.0002***

Final BW (kg)

46.8 ± 1.6

45.7 ± 1.0

40.1 ± 1.1

0.0016**

Total weight gain (kg)

9.5 ± 1.0

9.0 ± 0.7

8.3 ± 0.7

0.4418ns

Av. Daily gain (g)

194.5 ± 20.3

183.7 ± 14.5

169.0 ± 14.8

0.4418ns

Pre-slaughter weight (kg)c

47.0 ± 1.6

45.7 ± 1.0

42.2 ± 1.78

0.0540ns

HCW (kg)d

22.0 ± 0.9a

21.3 ± 0.8a

16.5 ± 0.9b

0.0030**

CCW (kg)d

21.7 ± 0.9a

21.0 ± 0.8a

16.2 ± 0.9b

0.0031**

Dressing percentage (%)

46.7 ± 0.8a

46.3 ± 1.2a

39.2 ± 1.7b

0.0078*

Fat thickness (mm)

4.7 ± 0.4a

4.3 ± 0.3a

3.3 ± 0.5b

0.0467*

Body wall thickness (mm)

16.1 ± 1.1

15.6 ± 0.7

13.8 ± 1.2

0.2648ns

GR fat score (1–5)

3.7 ± 0.3

3.6 ± 0.2

3.1 ± 0.3

0.3013ns

Yield grade

2.3 ± 0.5a

2.1 ± 0.1a

1.7 ± 0.8b

0.0470*

Rib eye area (cm2)

15.6 ± 0.5a

15.5 ± 0.5a

12.3 ± 0.8b

0.0022**

BCTRC %e

48.7 ± 0.2

49.0 ± 0.2

49.0 ± 0.3

0.5937ns

OTHf

109.8 ± 4.2a

106.3 ± 3.9a

82.5 ± 4.6b

0.0030**

  1. cPre-slaughter weight is the weight of animals (minus Merino ewes) prior to transport for slaughter. dHCW = Hot carcass weight. eCCW = Cold carcass weight. fBCTRC% = Boneless, Closely Trimmed Retail Cuts. fOTH = Over the hooks trade (this was based on 500¢ AU return per kg of HCW). Level of significance: ns not significant (p > 0.05), * significant (p < 0.05), ** highly significant (p < 0.01), and *** very highly significant (p < 0.001). Different superscripts indicate significant differences within each row (p < 0.05)