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OJVRTM
Online Journal of Veterinary Research©
Volume 26 (6): 402-412, 2022.
Reference plasma selenium,
zinc, manganese, copper and antioxidants in grazing pregnant ewes
M. Mohebbi-Fania, A. Mirzaeib,
S. Nazifib* , M. R. Tabandehc,
Z. Shabbooeid
aDepartment of Animal Health
Management, bClinical Studies, School of
Veterinary Medicine, Shiraz University, Shiraz; cDepartment
of Basic Sciences, School of Veterinary Medicine, Shahid
Chamran University, Ahvaz, dSchool
of Veterinary Medicine, Shiraz University, Shiraz, Iran
ABSTRACT
Mohebbi-Fani M, Mirzaei A, Nazifi S, Tabandeh MR, Shabbooei Z., Reference
plasma selenium, zinc, manganese, copper and antioxidants in grazing pregnant ewes,
Onl J Vet Res., 26 (6): 402-412, 2022. Reference plasma copper (Cu), zinc (Zn),
manganese (Mn), selenium (Se) and antioxidant enzymes
were determined in pregnant fat tailed grazing ewes. Whole blood samples of 47
ewes were taken at the first day of a 51-day breeding period (before pregnancy) and
120 days later (70-120 days of pregnancy). Pregnancy was confirmed in 43 ewes
by plasma progesterone at day 120. For the whole period of the study, the ewes were
grazing on medium-to-low quality pastures and cereal stubble and were offered about
1 kg/head/day of a mixture of alfalfa hay (40%) and wheat straw (60%) plus at
least 100g barley grain/head/day. A trace mineralized supplement was available
free choice. We measured erythrocyte malondialdehyde,
superoxide dismutase, glutathione peroxidase and plasma copper, zinc manganese
and selenium. In pregnant ewes malondialdehyde increased ~33% (P≤0.05)
at day 120 suggesting oxidative stress whereas superoxide and gluthathione oxiudasa, copper and
zinc declined ~41-62%. Findings suggest ewes experience oxidative stress during
pregnancy when fed medium to low quality forages.
Key words: Pregnancy, Selenium, Zinc, Copper, Superoxide dismutase, Glutathione
peroxidase, Oxidative stress, Sheep.
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