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

Table 2. Estimates and standard error for all independent variables when analysing the effect on interval from weaning to first mating, pregnancy chance
and litter size
N Range 1) Weaning to first mating interval Pregnancy chance Litter size
Estimate Std.err. P-value Estimate Std.err. P-value Estimate Std.err. P-value
Intercept 5.43 0.45 10.24 3.29 6.96 3.28
Parity 554 0.0002 0.006
1 0.66 3) 0.23 0 . -0.73 0.42
2-3 -0.02 3) 0.18 0.98 0.32 0.50 0.36
>3 0 3) . 1.15 0.39 0 .
Lactation length, ln(days) 554 -0.30 0.13 0.02 -1.21 0.72 0.24 2.30 0.74 0.003
Weaning to first mating int., days 515 0-8 -1.11 0.31 0.0004 -0.22 0.26 0.39
Back fat at weaning, mm 551 6-35 0.01 3) Indicators
0.01 0.03 0.06 0.03 0.43 0.07 0.04 0.11
Back fat gain, mm/week 481 -1.3-1.9 0.67 0.29 0.02 0.59 0.33 0.08
Not eating AM 2) , square root(%) 299 0-100 - - NS - - NS
Skin lesions M 2) , ln(no.) 542 0-171 0.04 0.02 0.07 - - NS - - NS
Skin lesions AM 2) , ln(no.) 543 0-208 - - NS - - NS
Aggressions, square root(no.) 552 0-66 - - NS - - NS - - NS
Fear (HA-test) W 2) 513 - - NS - - NS - - NS
Fear (FHA-test) AM 2) 529 - - NS - - NS
Lying behaviour W 2) 253 - - NS - - NS - - NS
Lying behaviour AM 2) 1)
Untransformed values
386 - - NS - - NS
2)
W: at weaning, M: At mating, AM: three weeks after mating
3)
Parity group interacted with back fat at weaning, estimate for interaction for parity group one, two and three respectively: -0,041 (0,016), -0,0019 (0,011), 0