Reproduction performances and conditions of group-housed non ...

- Paper III -
3.2 Between-farm and within-farm variation of indicators
In Figure 1, the variation between herds and between batches within herds are shown for
some of the indicators and in Table 6, the effects of herd and batches are given.
Table 6. Effect of herd and farrowing batch within herd on level of indicators
Variance component % of variation explained Significance
Herd (σk 2 ) Batch (σl(k) 2 ) Sow (ε ) Herd Batch Sow Herd Batch
Back fat W 1.8 2 1.1 2 4.0 2 16 5 79 * *
Back fat AM 1.5 2 1.2 2 3.8 2 12 8 80 * *
Back fat F 2.8 2 0 5.0 2 23 0 77 * -
Back fat gain W → AM 0.01 2 0.02 2 0.06 2 5 8 87 ns *
Back fat gain AM → F 0.02 2 0.008 2 0.03 2 31 5 64 * ns
Lesions, No. M 0.6 2 0.4 2 0.9 2 28 9 63 * **
Lesions, No. AM 0.5 2 0.4 2 0.8 2 24 14 62 * **
Lesions, No. F 1.1 2 0.3 2 1.0 2 52 5 43 ** *
% not eating AM 1.3 2 0.7 2 1.9 2 29 7 64 * *
Aggressions W 0.5 2 0.4 2 0.9 2 22 11 67 * **
Aggressions AM 0.4 2 0.3 2 0.7 2 22 10 67 * **
% in box W 0.6 2 0.8 2 2.1 2 7 12 81 ns *
Lying alone W 0.9 2 1.0 2 - a) 45 55 - a) ** ***
Lying alone AM 0.7 2 0.03 2 - a) 99