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Table 9 Parity distribution analysis

From: Low reproductive performance and high sow mortality in a pig breeding herd: a case study

   % Litters    
Parity % litters
Target
Oct 01-
Feb 02
July 02-
Nov 02
Dec 02-
May 03
Jun 03-
Dec 03
1 20 18.9 12.0 12.5 12.1
2 18 23.3 10.4 10.5 9.7
3 17 21.8 18.1 10.1 9.2
4 16 12.2 21.5 15.1 11.6
5 14 7.8 16.3 19.3 16.6
6 10 7.6 8.7 13.8 16.7
7 4 3.0 7.8 7.2 10.6
8 1 3.1 3.7 5.8 6.5
>8 0 2.4 1.6 5.6 7.0
Whole herd 100 100 100 100 100
GILT POOL (gilts available for service per 100 sows) 12-151 4.8 4.8 4.8 7
  1. 1 Suggested target by Carroll [6]