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dc.contributor.authorFreudenberger, David O.
dc.date.accessioned2012-08-13T23:19:26Z
dc.date.available2012-08-13T23:19:26Z
dc.date.issued1986
dc.identifier.urihttps://hdl.handle.net/10182/4771
dc.description.abstractTen yearling red deer stags (Cervus elaphus) and ten yearling Coopwerth wether sheep were offered ryegrass-white clover silage in amounts close to maintenance energy requirement. For six of each species, the diet was enhanced with 4.8 mg Mo and 2.4 g S/kg DM. Liver biopsy samples were obtained during weeks 1, 6, and 12. Five of each species were then offered the basal diet and the remainder, the basal diet supplemented with 4 mg Cu/kg DM. Liver biopsy samples were taken four and a half weeks later. Plasma samples were taken weekly for analysis of total and trichloroacetic acid (TCA) soluble copper. The mean initial liver copper concentration in sheep was 11- fold greater than in deer. Both diets induced liver copper depletion, and there was a trend for a greater rate of depletion on the Mo-S enhanced silage. The rate of depletion was 7-fold greater in sheep than in deer. In both species, highly significant linear relationships were observed between initial liver copper concentration and rate of liver copper depletion. During copper repletion, the rate of increase in liver copper in the supplemented groups tended to be greater in sheep than in deer. The mean estimate of endogenous loss of copper LW/d) was 1.43 ± 0.39 and 8.35 ± 1.71 in deer respectively. Calculated minimum values for availability of copper were 0.061 and 0.037 for deer respectively. (ug Cu/kg and sheep, fractional sheep and A TCA insoluble plasma copper fraction appeared toward the end of the depletion phase in sheep but not in deer. This fraction disappeared rapidly during repletion.en
dc.language.isoenen
dc.publisherLincoln College, University of Canterburyen
dc.rights.urihttps://researcharchive.lincoln.ac.nz/page/rights
dc.subjectcopper metabolismen
dc.subjectsheepen
dc.subjectred deeren
dc.subjectCervus elaphusen
dc.subjectliver biopsyen
dc.subjecthepatic-depletionen
dc.subjecthepatic-repletionen
dc.subjectendogenous lossen
dc.subjectabsorbabilityen
dc.subjectfalling diseaseen
dc.subjectcopper deficiencyen
dc.subjectdisease susceptibilityen
dc.subjectdigestive physiologyen
dc.subjectruminantsen
dc.titleComparative aspects of copper metabolism in sheep and deer (Cervus elaphus)en
dc.typeThesisen
thesis.degree.grantorUniversity of Canterburyen
thesis.degree.levelMastersen
thesis.degree.nameMaster of Applied Scienceen
lu.thesis.supervisorSykes, A. R.
lu.contributor.unitDepartment of Agricultural Sciencesen
dc.rights.accessRightsDigital thesis can be viewed by current staff and students of Lincoln University only. Print copy available for reading in Lincoln University Library. en
dc.subject.anzsrc070204 Animal Nutritionen
dc.subject.anzsrc060104 Cell Metabolismen
dc.subject.anzsrc060603 Animal Physiology - Systemsen
dc.subject.anzsrc070709 Veterinary Pathologyen


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