|
Parameter |
No. of studies |
Mean |
Median |
Minimum |
Maximum |
|
|
Arid zone |
||||||
|
|
Lamb mortality risk (%) |
8 |
28.7 |
28.6 |
17.8 |
45.0 |
|
|
Female replacement mortality risk (%) |
2 |
10.0 |
10.0 |
5.0 |
15.0 |
|
|
Male replacement mortality risk (%) |
2 |
10.0 |
10.0 |
5.0 |
15.0 |
|
|
Ewe mortality risk (%) |
5 |
12.4 |
12.0 |
0.0 |
25.0 |
|
|
Age at first lambing (months) |
2 |
18.5 |
18.5 |
18.0 |
19.0 |
|
|
Lambing rate (%) |
5 |
98.0 |
95.0 |
90.0 |
106.9 |
|
|
Prolificacy |
5 |
1.07 |
1.04 |
1.00 |
1.27 |
|
|
Offtake rate (%) |
3 |
22.6 |
23.5 |
19.3 |
25.0 |
|
|
Weight of mature ewes (kg) |
5 |
29.4 |
30.0 |
25.0 |
31.5 |
|
|
Weight of mature rams (kg) |
4 |
33.9 |
32.8 |
30.0 |
40.0 |
|
Semi-arid zone |
||||||
|
|
Lamb mortality risk (%) |
9 |
29.7 |
33.0 |
16.0 |
45.0 |
|
|
Female replacement mortality risk (%) |
1 |
15.0 |
15.0 |
15.0 |
15.0 |
|
|
Male replacement mortality risk (%) |
1 |
15.0 |
15.0 |
15.0 |
15.0 |
|
|
Ewe mortality risk (%) |
5 |
14.3 |
15.8 |
11.9 |
15.8 |
|
|
Age at first lambing (months) |
6 |
18.8 |
17.9 |
11.5 |
30.0 |
|
|
Lambing rate (%) |
12 |
95.3 |
94.4 |
50.0 |
145.8 |
|
|
Prolificacy |
6 |
1.04 |
1.04 |
1.00 |
1.14 |
|
|
Offtake rate (%) |
3 |
20.6 |
19.3 |
15.8 |
26.7 |
|
|
Weight of mature ewes (kg) |
13 |
31.5 |
30.0 |
25.0 |
43.8 |
|
|
Weight of mature rams (kg) |
8 |
37.8 |
40.0 |
28.0 |
45.0 |
