Thesis (M.S.)--University of Wisconsin--Madison, 1966. / eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1954. / Vita. Includes bibliographical references (leaf 66). Also available via the Internet.

Thesis (Ph. D.)--Cornell University, 1914. / "Reprinted from the American journal of anatomy, vol. 17, nos. 3 and 4, March and May, 1915." Bibliography: p. 333, 486-487.

Copy of author's previously published artice inserted. Bibliography: leaves 94-105. Antemortem inspection is a visual health check that has always been done at the abattoir before slaughter to separate pigs that are suffering or that may not be completely suitable for human consumption... The adoption of hazard analysis and critical control point quality assurance systems by the Australian Pig Industry has provided a framework for performance of antemortem inspection on-farm. Producers in three states (Victoria, Queensland and South Australia) were trained to conduct antemortem inspection on-farm, and their efficiency evaluated against antemortem inspection conducted at the abattoir.

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Genetic parameters were estimated for 2403 purebred Landrace pigs ever a two year period, representing 21 sires. The traits studied included average daily gain, age adjusted to 91 kg, ultrasonic measurements of backfat at the midback and loin positions, total and adjusted total ultrasonic backfat and corresponding carcass backfat measurements. Least squares analyses were used to estimate and adjust for the effects of sex, season and sex by season interaction. Heritabilities and genetic correlations were calculated for all traits using both half and full-sib estimates. Adjusted age and adjusted total ultrasonic backfat measurements were found to be the nest appropriate predictors of carcass value. Estimates of heritability for adjusted age and adjusted total ultrasonic backfat were 0.24±0.10 and 0.26±0.10 based on half-sib and 0.56±0.07 and 0.41±0.06 from full-sib analyses. Genetic correlations between these two traits were -0.07±0.28 and -0.01±0.10 based on the two respective methods. The total phenotypic correlation was -0.01±0.02. A selection index example was developed from half-sib estimates of the genetic parameters and economic factors were estimated from fixed and variable costs for adjusted age and the Canadian market index system. / Land and Food Systems, Faculty of / Graduate

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