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Filtering by: Contributor advisor sim Meyer, Howard H. Degree Name Doctor of Philosophy (Ph.D.)

Inheritance of antibodies synthesized against IBR vaccine and of complement C3 component in weanling calves

Creator:

Muggli, Noelle Elizabeth

Abstract:

Three sets of blood samples were taken from 532 beef calves of two populations at 24 to 48 h after birth, at an average age of 164 d (at time of vaccination for infectious bovine rhinotracheitis virus or IBRV) and at an average age of 224 d (60 d postvaccination)....

Resource Type:

Dissertation
Effects of pasture and management variables on forage intake by grazing sheep

Creator:

Lewis, Robert David

Abstract:

Grazing experiments were conducted in summer, autumn and winter to assess the effects of stock density, grazing duration, pre-grazing pasture mass and stock type on forage intake by sheep grazing at high stock densities for short durations. In summer and winter, sheep were stocked at 200 sheep/ha on 0.1 ha...

Resource Type:

Dissertation
Genetic and environmental variation in production components of purebred and crossbred ewes

Creator:

Nawaz, Mohammad, 1957-

Abstract:

Coopworth sheep, a newly available genotype, were compared with other genotypes in two trials to assess cumulative lamb and wool production and contributing components related to survival, reproduction and growth, and for the effects of ewe body weight on reproductive traits. In a third trial, various genotypes generated in the...

Resource Type:

Dissertation
Development, evaluation and application of a mixed-family selective breeding method for the Pacific oyster (Crassostrea gigas)

Creator:

Matson, Sean Erik

Abstract:

This dissertation develops mixed family selection for Pacific oysters using marker-based pedigree reconstruction. It focuses on improving the efficiency of parentage assignment, determining the optimum life stage to mix oyster families for rearing and selection, comparing mixed-family and separate-family selective breeding in the field, and applying the mixed method to...

Resource Type:

Dissertation