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Table 4 Feed cost per meat produceda, sale incomeb and margin over feed costsc (mean ± SD, €/pig) for four main cohorts of pigs retrospectively identified according to the time they spent in each of the production stages in a study investigating management approaches for body weight variation in a farrow-to-finish pig commercial farm and their possible implications for animal health

From: Identifying challenges to manage body weight variation in pig farms implementing all-in-all-out management practices and their possible implications for animal health: a case study

Cohortd

Sub-cohorte

Description

n

Feed costs, €

Sales income, €

Margin over feed costs, €

Mean

SD

Mean

SD

Mean

SD

1

Pigs born one week later and weaned at 21 d of age

48

NAf

NA

NA

NA

NA

NA

2

2a

Pigs weaned at 28 d of age. Splitg by size 3 weeks post-weaning from group a group of 888 pigs

265

100.0

9.68

165.8

16.04

65.7

6.36

2

2b

Pigs weaned at 28 d of age. Splitg by size 3 weeks post-weaning from sub-cohort 2a and 5 weeks post-weaning from sub-cohort 2c

357

95.9

9.41

159.0

15.59

63.0

6.18

2

2c

Pigs weaned at 28 d of age. Smaller size pigs splitg by size 5 weeks post-weaning from sub-cohort 2b

87

93.5

10.11

155.0

16.75

61.5

6.65

3

Pigs weaned at 35 d of age

25

90.3

12.10

149.6

20.05

59.4

7.95

4

Pigs weaned at 49 d of age plus delayed pigs from the other cohorts and pigs that had returned from the hospital facilities

94

84.3

12.32

139.8

20.42

55.5

8.10

  1. aCalculated by multiplying kg of cold carcass weight by €1.08 which was the average feed cost per kg of meat in Ireland from November 2019 to October 2020
  2. bCalculated by multiplying kg of cold carcass weight by €1.79 which was the average sales price per kg of meat in Ireland from November 2019 to October 2020
  3. cCalculated as sales income minus feed cost per kg of meat
  4. dCohorts formed at weaning
  5. eSub-cohorts formed during the first nursery stage
  6. fNA No records available
  7. gSplit done based on farmer’s decisions and subjective appraisal