Recurrence patterns and lifetime performance of parity 1 sows in breeding herds with different weaning-to-first-mating intervals

Table 6 Comparisons of lifetime performance of sows between six weaning-to-first-mating interval (WMI) groups¹

WMI groups in parity 1 (days)	n	Parity at removal	Lifetime piglets born alive	Lifetime non-productive days	Annualized lifetime piglets born alive	Annualized lifetime piglets weaned
WMI groups in parity 1 (days)	n	Mean (± SE)
0–3	5909	5.6 (0.07)b	67.0 (0.90)b	76.5 (1.72)de	28.5 (0.21)ab	24.5 (0.17)b
4	43,178	5.8 (0.06)a	71.3 (0.80)a	77.1 (1.59)e	28.7(0.19)a	25.0 (0.16)a
5	55,378	5.8 (0.06)a	70.8 (0.79)a	78.3 (1.58)d	28.4 (0.19)b	24.9 (0.16)a
6	11,377	5.6 (0.06)b	68.6 (0.84)b	81.1 (1.65)c	28.0 (0.20)c	24.7 (0.17)b
7–20	18,219	5.5 (0.06)c	67.1 (0.82)c	88.3 (1.62)b	27.8 (0.20)d	24.3 (0.17)b
21 or more	9991	5.1 (0.06)d	62.3 (0.85)d	108.8 (1.66)a	26.6 (0.20)e	22.9 (0.17)c

¹Means and SE were estimated by using mixed models
^a-eDifferent superscripts within a column represent significant differences in means (P < 0.05)

ISSN: 2055-5660