Table 3.
Hypotheses, models and AIC diagnostics
| Lamb survival predictors | Model | AIC | Delta-AIC | AIC weight |
|---|---|---|---|---|
| Interactions with specific groups of infected animals Dam’s antibodies | β0 + β1PIReproEwe + β2PIDryYrl + β3M | 48·41 | 0 | 0·59 |
| Associations with specific groups of infected animals | β0 + β1PAReproEwe + β2PADryYrl + β3M | 49·25 | 0·84 | 0·39 |
| Dam’s antibodies | ||||
| Total population size | β0 + β1PopEst | 55·46 | 7·06 | 0·02 |
| Interactions with specific groups of animals regardless of infection status Dam’s antibodies | β0 + β1DReproEwe + β2DDryYrl + β3M | 57·13 | 8·72 | 0·01 |
| Associations with specific groups of infected animals | β0 + β1PAReproEwe + β2PADryYrl | 60·37 | 11·96 | No support |
| Interactions with specific groups of infected animals | β0 + β1PIReproEwe + β2PIDryYrl | 60·43 | 12·02 | No support |
| Associations with specific groups of animals regardless of infection status Dam’s antibodies | β0 + β1CReproEwe + β2CDryYrl + β3M | 63·51 | 15·1 | No support |
| Interactions with specific groups of animals regardless of infection status | β0 + β1DReproEwe + β2DDryYrl | 64·47 | 16·06 | No support |
| Dam’s antibodies | β0 + β1M | 67·24 | 18·83 | No support |
| Constant risk | β0 | 70·75 | 22·34 | No support |
| Total associations with infected animals, regardless of demographic state | β0 + β1Σ(PAReproEwe + PADryYrl) | 72·25 | 23·84 | No support |
| Associations with specific groups of animals regardless of infection status | β0 + β1CReproEwe + β2CDryYrl | 71·81 | 23·4 | No support |
| Total associations with all animals, regardless of infection status or demographic state | β0 + β1Σ(CReproEwe + CDryYrl) | 77·11 | 28·69 | No support |
| Total interactions with all animals, regardless of infection status or demographic state | β0 + β1Σ(DReproEwe + DDryYrl) | 77·91 | 29·49 | No support |