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A Survey of Productivity and its Component Interrelationships in Canadian Swine Herds¹

University of Guelph, Guelph, Ontario, Canada N1G 2W1

Abstract

Sow and feeder pig productivity was measured in a representative sample of herds producing more than 1,000 pigs/yr in Ontario, Canada. Correlations between the various indicators of productivity were determined. There was a wide range between farms in sow productivity, in grower-finisher pig efficiency and in the efficiency of resource utilization. Larger herds made better use of available physical resources, as indicated by the greater number of pigs weaned per farrowing crate per year and the greater number of feeder pigs marketed per m² of feeder pen space per year. They also tended to have greater biological efficiency, as indicated by the greater number of pigs weaned per sow per year. Interrelationships among productivity variables were discussed. It was concluded that the potential for improvement of productivity in Canadian swine herds was great.

¹ This research would have been impossible to perform without the assistance of Gary Norwell, Joan Holland and Gerry Varcoe and the advice and help of Dr. Alberta Butler. Financial assistance for the project was provided from provincial lottery funds administered by the Ontario Ministry of Agr. and Food.

² Dept. of Clin. Stud.

³ Dept. of Anim. and Poul. Sci.

⁴ Inst. of Computer Sci.

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