Department of Veterinary Biochemistry, College of Veterinary and Animal Science, Bikaner-334 001, India.
*Part of M.V.Sc. thesis of first author.
The present investigation was undertaken with the objective of correlating peripheral concentration of Thyroxine (T4) and Triiodothyronine (T3) hormone with age and sex in Magra sheep. Also, the study was aimed to correlate the peripheral concentration of thyroid hormones with serum cholesterol during ageing. The T4 concentration decreased with the advancing age. No definite pattern was noticed in the changes of T3 level as the age advanced. Female animal had significantly (P<0.01) higher total T4 levels as compared to males whereas no sexual dimorphism was observed in T3 levels. Serum cholesterol concentration increased with the advancement of age.
