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Table 2 Distribution of parity number for gestations in System I and System II. The table also shows the overall Least Squares Mean number of piglets born alive per parity number

From: A comparison of two systems for group housing of gestating sows - effects on productivity, removal, and treatments

 

System I

(Straw bed)

System II

(pen)

Sows and gilts (both systems combined)

(n = 120)

(n = 138)

(n = 258)

Liveborn

(LSM)

Parity 1

15

1

16

13.1

A

Parity 2

30

63

93

16.2

B

Parity 3

30

36

66

16.7

B

Parity 4

29

23

52

16.7

B

Parity 5

13

7

20

15.4

AB

Parity 6

3

7

10

14.3

AB

Parity 7

0

0

0

-

-

Parity 8

0

0

0

-

-

Parity 9

0

1

1

14.8

AB

Mean ± SD

3.0 ± 1.3

3.0 ± 1.3

3.0 ± 1.3