Table 1 Descriptive information on the herd characteristics and technical parameters of 60 farrow-to-finish herds in Germany
Parameter | N | Mean | Median | SD | Min | Max |
|---|---|---|---|---|---|---|
Number of sows/ herd | 60 | 396 | 300 | 299 | 100 | 1510 |
Number of litters/ sow/ year | 60 | 2.36 | 2.37 | 0.88 | 2.12 | 2.53 |
Mortality till weaning (%) | 60 | 15.1 | 15.3 | 5.5 | 3.3 | 30.4 |
Weaning age (days) | 60 | 24.4 | 25.2 | 3.3 | 19.3 | 32.6 |
Number of weaned pigs/ sow/ year | 60 | 27.3 | 26.9 | 2.6 | 21.1 | 32.2 |
Number of sows per employee | 58a | 130 | 107 | 64 | 50 | 450 |
Number of slaughtered pigs/ year | 60 | 5306 | 3740 | 5657 | 1000 | 40,000 |
Average daily weight gain (g/day) | 38a | 811.2 | 800 | 43.8 | 720 | 900 |
Average feed conversion ratio (g/g)/ year | 27a | 2.75 | 2.72 | 0.13 | 2.4 | 2.95 |
Years experience farmer | 60 | 24.9 | 25 | 10.2 | 5 | 45 |
Number of pathogens vaccinated against | 60 | 6.9 | 7 | 1.5 | 4 | 10 |