Table 2. Comparison of weaning and mating performances between the pre-depopulation and post-depopulation periods.
| Parity |
|||
|---|---|---|---|
| 1 | 2 | 3 | |
| Number of pigs weaned (pigs) | |||
| Pre-depopulation period | 10.3 ± 0.05 | 10.3 ± 0.05 | 10.3 ± 0.05 |
| Post-depopulation period | 10.1 ± 0.06 | 10.5 ± 0.05 | 10.7 ± 0.08 |
| Preweaning mortality (%) | |||
| Pre-depopulation period | 6.6 ± 0.38b) | 6.5 ± 0.36 | 6.4 ± 0.34 |
| Post-depopulation period | 10.3 ± 0.48a) | 8.0 ± 0.35 | 9.3 ± 0.38 |
| Piglet weight at weaning (kg) | |||
| Pre-depopulation period | 7.7 ± 0.02b) | 7.8 ± 0.03b) | 7.7 ± 0.03b) |
| Post-depopulation period | 8.8 ± 0.05a) | 8.7 ± 0.03a) | 8.8 ± 0.03a) |
| Weaning-to-first-mating interval (days) | |||
| Pre-depopulation period | 12.5 ± 0.53 | 8.7 ± 0.41 | 8.0 ± 0.36b) |
| Post-depopulation period | 12.1 ± 0.44 | 9.0 ± 0.31 | 9.5 ± 0.38a) |
| Farrowing rate (%) c) | |||
| Pre-depopulation period | 86.6 ± 0.80 | 82.6 ± 0.99 | 88.6 ± 0.84b) |
| Post-depopulation period | 87.3 ± 0.83 | 84.9 ± 0.97 | 94.2 ± 0.73a) |
Mean values within a column for each measurement with different letters were significantly different between the pre-depopulation and post-depopulation periods (P<0.05). c) Values in the left, middle and right columns are the farrowing rates for parities of 0, 1 and 2, respectively. (mean ± SEM).