Table 4 Estimates of fixed factors and random effect variance in the models for longevity and fertility measurements
Sow life days | Herd-life days | Herd-life nonproductive days | Parity at removal | |
|---|---|---|---|---|
Fixed and random effects | Estimate (± SE) | Estimate (± SE) | Estimate (± SE) | Estimate (± SE) |
Intercept | 936.64 (28.19) | 682.21 (28.19) | 61.04 (5.1580) | 4.49 (0.18) |
Age at first-mating | 0.2381 (0.0005)* | − 0.7619 (0.0596)* | 0.0172(0.0099)* | −0.0055 (0.0004)* |
Age at first-mating squared | − 0.0010 (0.0005)* | − 0.0010 (0.0005)* | − 0.00013 (0.00009) | − 0.000009 (0.000004)* |
Herd size groups | ||||
Small herds | 25.8010 (38.2240)* | 25.8010 (38.2240)* | −0.2871 (6.9943)* | 0.1568 (0.2527) |
Age at first-mating x Herd size | ||||
Age at first-mating x Small-to-mid herds | 0.6360 (0.0710)* | 0.6360 (0.0710)* | −0.0246 (0.0119)* | 0.0047 (0.0005)* |
Herd productivity groups | ||||
Ordinary herds | −10.4434 (37.7297) | −10.4434 (37.7297) | 9.8396 (6.9064)* | −0.1535 (0.2493) |
Age at first-mating x Herd productivity | ||||
Age at first-mating x Low herds | −0.0949 (0.0704) | −0.09492(0.0704) | 0.0219 (0.0117) | −0.0008 (0.0005) |
Herd size x Herd productivity | ||||
Small-to-mid herds x Ordinary herds | 62.9712 (47.4994) | 62.9712 (47.4994) | 18.4513 (8.6888)* | 0.2775 (0.3141) |
Intercept variance at herd level | 9372 | 9372 | 298 | 0.40 |
ICC (records within the same herd), % | 6.3 | 6.3 | 7.6 | 5.3 |