Blood mineral, trace-element and vitamin concentrations in Huacaya alpacas and Merino sheep grazing the same pasture

Judson, G. J., McGregor, B. A. and Howse, A. M. 2011, Blood mineral, trace-element and vitamin concentrations in Huacaya alpacas and Merino sheep grazing the same pasture, Animal production science, vol. 51, no. 10, pp. 873-880.

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Title Blood mineral, trace-element and vitamin concentrations in Huacaya alpacas and Merino sheep grazing the same pasture
Author(s) Judson, G. J.
McGregor, B. A.ORCID iD for McGregor, B. A.
Howse, A. M.
Journal name Animal production science
Volume number 51
Issue number 10
Start page 873
End page 880
Total pages 8
Publisher CSIRO Publishing
Place of publication Collingwood, Vic.
Publication date 2011
ISSN 1836-0939
Keyword(s) fleece colour
pasture minerals
Summary We aimed to determine whether the concentration of minerals and trace constituents in blood of Merino sheep and Huacaya alpacas grazing the same pasture differed with species and time of sampling. Blood samples and pasture samples were collected at frequent intervals over a period of 2 years for mineral and trace-nutrient assay. The concentration of the minerals and trace nutrients in the grazed pasture usually met the dietary needs of sheep at maintenance, apart from potassium, sulfur, cobalt and Vitamin E in occasional samples. Restricted maximum likelihood mixed model analysis indicated a significant (P < 0.001) species by month by year interaction for all blood constituents assayed, a significant (P < 0.05) species by coat shade interaction for plasma Vitamin D, E and B12 and a significant (P < 0.001) species by month by Vitamin D interaction for plasma phosphorus concentrations. In general, plasma calcium concentrations were greater in sheep than in alpacas but plasma magnesium concentrations were greater in alpacas than in sheep. There was no consistent difference between the two species in plasma phosphorus concentrations although low values were recorded in individual sheep and alpacas. Plasma Vitamin D concentrations were more responsive to increasing hours of sunlight in alpacas than they were in sheep. Sheep had consistently higher concentrations of plasma copper, zinc and Vitamin B12 and higher concentrations of blood selenium but lower concentrations of plasma selenium and Vitamin A, than did alpacas. No consistent difference was observed between the two species in plasma Vitamin E concentrations.
Language eng
Field of Research 070703 Veterinary Diagnosis and Diagnostics
Socio Economic Objective 830307 Minor Livestock (e.g. Alpacas, Ostriches, Crocodiles, Farmed Rabbits)
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2011, CSIRO
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