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Table 1 General information of participating pig farms, reported by farmers

From: A survey of straw use and tail biting in Swedish pig farms rearing undocked pigs

Parameter Nursery units Finishing pig units
n Median Mean SD Min Max n Median Mean SD Min Max
Total number of pig places 46 815 1088 894 126 4000 43 1200 1434 1164 132 6500
Number of produced pigs/year 43 3600 4484 3795 350 20,000
Age at entry (days) 35 35 37.9 8.9 31 84 42 84 84 8.7 63 105
Weight at entry (kg) 35 10.5 11.4 5.1 9 40 43 30 31 2.8 25 37
Number of pigs/pen 45 11 24 43 10 300 43 10 15 17 7 100
Size of pen (m2) 45 6 21 49 3 300 43 9.6 19 40 7 250
Space allowance/pig (m2) 44 0.5 0.53 0.13 0.3 1.9 43 1 0.96 0.08 0.8 2.5
  1. n is number of farmers answering the question. Eleven of the farmers did not move nursery pigs into a new stable after weaning, which is why age and weight at entry to the nursery unit was only answered by 35 farmers