From: Culling in served females and farrowed sows at consecutive parities in Spanish pig herds
Parity 1 | Parity 2 | Parity 3 | Parity 4 | Parity 5 | Parity 6 | |
---|---|---|---|---|---|---|
Final model No. | Model 12 | Model 8 | Model 5 | Model 8 | Model 7 | Model 7 |
Groups | Culling risks (± SE) | |||||
Herd groups | ||||||
High-performing herds | – | 5.1 (0.53)a | 7.0 (0.68)a | 8.8 (0.94)a | 12.4 (1.28)a | 20.9 (2.78)a |
Ordinary herds | – | 3.6 (0.27)b | 4.5 (0.31)b | 6.2 (0.43)b | 9.5 (0.63)b | 15.3 (1.23)b |
Pigs born alive groups | ||||||
16 or more | 4.3 (0.44)b | 2.5 (0.24)c | 3.1 (0.26)c | 4.4 (0.34)c | 6.5 (0.51)c | 11.4 (0.99)c |
9–15 | 4.3 (0.23)b | 3.3 (0.21)b | 4.3 (0.25)b | 5.6 (0.36)b | 8.6 (0.53)b | 16.2 (1.25)b |
8 or fewer | 7.1 (0.40)a | 9.4 (0.62)a | 13.1 (0.82)a | 16.2 (1.09)a | 23.0 (1.46)a | 31.1 (2.42)a |
Stillborn piglet groups | ||||||
0 | 4.3 (0.24)b | 3.3 (0.22)c | 4.6 (0.28)b | 6.0 (0.40)c | 9.2 (0.60)b | 16.7 (1.32)b |
1–2 | 4.7 (0.29)b | 3.9 (0.27)b | 5.0 (0.32)b | 6.9 (0.46)b | 9.9 (0.65)b | 17.6 (1.39)b |
3 or more | 6.5 (0.62)a | 6.1 (0.49)a | 7.7 (0.54)a | 9.7 (0.68)a | 14.0 (1.02)a | 19.4 (1.63)a |