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Filtering by: Contributor advisor sim Meyer, Howard H. Decade 1980-1989

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
Effect of early exposure of tansy ragwort (Senecio jacobaea) on future grazing preferences of sheep

Creator:

Naranjo R., Victor Hugo

Abstract:

Tansy ragwort (Senecio iacobea) is a widely distributed weed in the Pacific Northwest (U.S.A.) where it causes severe damage to the livestock industry. Sheep are highly resistant to toxic effects of ragwort, therefore, induction of ragwort preference in sheep was sought as a means to control this poisonous plant. The...

Resource Type:

Masters Thesis
Genetic and environmental influences on lamb carcass indices and muscle fiber ratios

Creator:

Arnold, Andrew M.

Abstract:

Two concurrent trials were conducted to examine genetic and environmental influences on growth rate, carcass fatness and muscle fiber type proportions. Trial 1 compared Polypay and Coopworth x Polypay male lambs either left intact or castrated early, mid or late in growth. Trial two compared Hampshire sired lambs (females, early...

Resource Type:

Masters Thesis
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