Table 6 Estimated variance components (with s.e.) from individual and pooled data on survival in laying hens

Direct–indirect animal model on individual data

${\mathrm{\sigma }}_{A_{\mathrm{D}}}^2$

705 (± 171)

1404 (± 301)

${\mathrm{\sigma }}_{A_{\mathrm{DI}}}$

59 (± 61)

−162 (± 105)

${\mathrm{\sigma }}_{A_{\mathrm{I}}}^2$

104 (± 41)

232 (± 72)

${\mathrm{\sigma }}_{\mathit{Cage}}^2$

799 (± 166)

1191 (± 238)

${\mathrm{\sigma }}_E^2$

7980 (± 210)

12 675 (± 365)

${\mathrm{\sigma }}_{A_{\mathit{T}}}^2$ ^§

1996 (± 640)

2521 (± 842)

Expected ${\mathrm{\sigma }}_{E^{*}}^2$^§§

44 700 (± 2526)

69 752 (± 3513)

Traditional (direct) animal model on individual data

${\mathrm{\sigma }}_{A_{\mathrm{D}}}^2$

677 (± 165)

1522 (± 317)

${\mathrm{\sigma }}_{\mathit{Cage}}^2$

1096 (± 127)

1443 (± 186)

${\mathrm{\sigma }}_E^2$

8002 (± 205)

13 008 (± 338)

Traditional animal model on pooled data

${\mathrm{\sigma }}_A^2$

1979 (± 643)

2521 (± 845)

${\mathrm{\sigma }}_{E^{*}}^2$

44 750 (± 2538)

69 750 (± 3519)