Index Catalog // ScholarsArchive@OSU

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

Effects of differential ewe body condition at mating and early post-mating nutrition on embryo survival

Creator:: West, Kathryn S.
Abstract:: Two trials were conducted over consecutive years to examine the effects of ewe body condition and post-mating nutrition on ovulation rates and embryo survival. Trial 1 used 146 Polypay ewes ranging in age from 5 to 8 years in a 3 x 2 factorial array of pre-mating (high-H, low flushed-LF...
Resource Type:: Masters Thesis

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

Effects of body condition and pre-lambing supplementation on ewe productivity

Creator:: Khan, Khalidullah
Abstract:: A series of trials was conducted with Polypay (P), Coopworth (CP), Hampshire (H), and crossbred ewes over a two year period at three locations to assess the effects of ewe body condition and pre-lambing supplementation on ewe productivity. Supplementation trials were conducted at all three locations in Year 1 using...
Resource Type:: Masters Thesis

Effect of callipyge gene on lamb growth, carcass characteristics, and meat quality

Creator:: Srinivasan, Haribaskar
Abstract:: Callipyge (CLPG, n=16) and normal (N, n=11) lambs were produced from Polypay dams and Dorset sires heterozygous for the CLPG gene to study the effects of the gene on growth and carcass and meat quality parameters. CLPG lambs had higher average daily gain than N lambs (0.26 vs 0.23 kg/day,...
Resource Type:: Masters Thesis

Effects of sheep grazing to control weeds in a pine plantation on weed reproductive success, trees and sheep performance

Creator:: Milliman, Lisa J.
Abstract:: Use of sheep to control weeds in a ryegrass-white clover pasture in which Knob Cone-Monterrey hybrid pine trees had been planted was investigated in Corvallis, Oregon during 1997-1998. Treatments consisted of an ungrazed control (C) and grazing applications to achieve 25 (L), 50 (M) or 75 (H) percent utilization of...
Resource Type:: Masters Thesis

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

ScholarsArchive@OSU

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

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

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

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

Effects of differential ewe body condition at mating and early post-mating nutrition on embryo survival

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

Effects of body condition and pre-lambing supplementation on ewe productivity

Effect of callipyge gene on lamb growth, carcass characteristics, and meat quality

Effects of sheep grazing to control weeds in a pine plantation on weed reproductive success, trees and sheep performance

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

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