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

- Paper III -
Table 3. Overall mean and variation shown as the standard deviations (Std), the minimum (Min) and
maximum (Max) values, the median (M50) and the 5% (Q5) and 95% (Q95) quantiles for all continuous
indicators (sow level)
N Mean Std Min Max M50 Q5 Q95
Back fat W mm 551 15 5 6 35 14 9 23
Back fat AW mm 524 16 4 7 34 15 10 24
Back fat F mm 428 18 6 6 43 17 10 30
Back fat gain W → AM mm/day 481 0.03 0.07 -0.19 0.27 0.03 -0.08 0.16
Back fat gain AM → F mm/day 387 0.03 0.04 -0.11 0.17 0.02 -0.03 0.1
Not eating W % 19 54 - 0 98 52 0 98
Not eating M % 62 46 - 0 100 47 4 92
Not eating AM % 299 27 - 0 100 21 0 74
Lesions W cm 554 3 - 0 162 0 0 14
Lesions M cm 542 66 - 0 330 48 3 181
Lesions AM cm 543 76 - 0 384 63 6 197
Lesions F cm 456 46 - 0 249 31 0 143
Lesions W no. 554 2 - 0 100 0 0 12
Lesions M no. 542 28 - 0 171 23 1 72
Lesions AM no.. 543 37 - 0 208 30 3 86
Lesions F no. 456 26 - 0 188 18 0 78
Aggressions W no. 552 4.0 - 0 66.0 3 0 13
Aggressions M no.. 99 0.7 - 0 7.0 0 0 3.0
Aggressions AM no. 479 1.5 - 0 21 1 0 5
Aggressions int 3+4 1) W no. 552 2.5 - 0 36 2 0 8
Aggressions int 3+4 1) M no. 99 0.3 - 0 3 0 0 2
Aggressions int 3+4 1) AM no. 479 0.3 - 0 6 0 0 2
% in box W % 348 63 - 0 100 71 0 100
% in box AM % 74 95 - 0 100 100 75 100
W: Weaning M: Mating AM: Three weeks after mating F: Farrowing
1) Only serious interactions, 3 (several bites/knocks/pushes) and 4 (bites from both sows).
The variation cannot be presented as variation between sows for all lying and fear measurements
because these indicators are categorical. Instead the variations of these indicators
are presented as the variation between batches (Table 4).
Table 4. Mean and variation shown as the minimum (Min) and maximum (Max) values, the median
(M50) and the 25% (Q25) and 75% (Q75) quantiles for all categorical indicators (%sows per batch)
N Mean Min Max M50 Q25 Q75
Lying W 56 26 0 100 20 10 40
Lying AM 52 68 0 100 80 55 90
Lying alone W 52 25 0 30 10 0 11
Lying alone AM 55 8 0 70 20 10 30
Fear test (HA) 53 30 0 90 22 10 50
Fear test (FHA) M 8 63 22 100 72 30 89
Fear test (FHA) AM 56 47 0 100 50 30 60
Fear test (FHT) M 8 49 0 89 50 34 71
Fear test (FHT) AM 56 48 0 100 50 30 66
W: Weaning M: Mating AM: Three weeks after mating F: Farrowing
3.1 Relation between indicators
The correlations between the indicators are shown in Table 5. Back fat measured at different
times were highly correlated. Further, although less pronounced, correlations between
back fat and back fat gain existed. High back fat at weaning was negative correlated with
back fat gain from weaning to three weeks after weaning but positive correlated to back fat
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