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1982; Kansas Agricultural Experiment Station contribution; no. 82-614-S; Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 422; Swine; Birth sequence; Litter size
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Full-Text Articles in Life Sciences
Birth Sequence And Its Effects On Litter Size (1982), J D. Wheat, M S. Suba, G L. Allee, Robert H. Hines
Birth Sequence And Its Effects On Litter Size (1982), J D. Wheat, M S. Suba, G L. Allee, Robert H. Hines
Kansas Agricultural Experiment Station Research Reports
Average farrowing interval and duration were 15.8 and 143.8 minutes for 1766 pigs born in 169 litters. Pigs born later in the litter were larger (r=.43) at birth. The correlation was -.14 between farrowing interval, average time between the birth of pigs within the litter, and litter 21-day weight. Sixteen pigs were classified as mummies and their birth sequences ranged from 1 to 15 with an average of 6.5. In 53.5 percent of the litters, the first pig born was a gilt and in 18.4 percent of the litters the first pig born was the largest in the litter. However, …