High-performing farms exploit reproductive potential of high and low prolific sows better than low-performing farms

Tani, Satomi; Piñeiro, Carlos; Koketsu, Yuzo

doi:10.1186/s40813-018-0091-8

Table 6 Comparisons of reproductive performance between three farm productivity groups and between three sow groups categorized by piglets born alive in parity 1¹

From: High-performing farms exploit reproductive potential of high and low prolific sows better than low-performing farms

	Sow groups²
	High prolific sows	Intermediate prolific sows	Low prolific sows
Farm groups³	Mean (± SE)	Mean (± SE)	Mean (± SE)
	Number of sows
High-performing farms	6624	25,318	3332
Intermediate-performing farms	3744	28,944	4575
Low-performing farms	784	9562	2213
	Gilt age at first-mating, days old⁴
High-performing farms	257.7 (6.05)x	257.3 (6.04)y	256.7 (6.06)y
Intermediate-performing farms	249.7 (4.31)x	248.1 (4.28)y	247.6 (4.30)y
Low-performing farms	259.3 (6.03)x	256.5 (5.93)y	255.8 (5.96)y
	Parity at removal⁴
High-performing farms	5.1 (0.12)x	5.0 (0.11)x	4.2 (0.12)y
Intermediate-performing farms	5.1 (0.09)x	5.1 (0.08)x	4.6 (0.09)y
Low-performing farms	4.9 (0.14)x	4.9 (0.11)x	4.3 (0.12)y
	Lifetime piglets born alive
High-performing farms	70.3 (1.40)ax	61.9 (1.36)ay	44.4 (1.45)z
Intermediate-performing farms	66.4 (1.07)abx	59.3 (0.97)aby	45.8 (1.05)z
Low-performing farms	63.6 (1.71)bx	55.8 (1.36)by	41.3 (1.48)z
	Lifetime piglets weaned
High-performing farms	56.0 (1.15)ax	54.7 (1.11)ay	45.3 (1.19)az
Intermediate-performing farms	52.1 (0.89)ax	51.2 (0.79)axy	44.7 (0.86)ay
Low-performing farms	46.8 (1.42)bx	46.5 (1.12)bxy	38.7 (1.22)by
	Lifetime non-productive days
High-performing farms	82.1 (2.87)cx	80.2 (2.82)cy	73.1 (2.93)cz
Intermediate-performing farms	96.2 (2.13)bx	95.5 (1.99)by	90.8 (2.10)bz
Low-performing farms	111.8 (3.25)ax	109.3 (2.80)ay	103.8 (2.94)az
	Annualized lifetime piglets weaned per sow
High-performing farms	25.8 (0.20)ax	25.8 (0.19)ax	24.5 (0.21)ay
Intermediate-performing farms	23.4 (0.16)bx	23.1 (0.14)by	21.3 (0.15)bz
Low-performing farms	20.9 (0.26)cx	20.6 (0.19)cx	18.3 (0.21)cy

^a-cDifferent superscripts within a column represent significant differences in means (P < 0.01)
^x-zDifferent superscripts within a row represent significant differences in means (P < 0.01)
¹Means and SE were estimated by mixed models
²Groups based on the upper and lower 10th percentiles of piglets born alive in parity 1: High (15 piglets or more); Intermediate (8 to 14 piglets) and Low (7 piglets or fewer) prolific sows
³Categorized by farm means of the upper and lower 25th percentiles of annualized lifetime piglets weaned per sow over 6 years: High- (> 24.7 piglets); Intermediate- (24.7 to 21.2 piglets) and Low- (< 21.2 piglets) performing farms
⁴There were no two-way interactions for ages at first-mating, parity at removal or lifetime non-productive days (P ≥ 0.05)

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ISSN: 2055-5660

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