
%0 Journal Article
%A Wallace, ALC 
%T Variations in Plasma Thyroxine Concentrations Throughout One Year in Penned Sheep on a Uniform Feed Intake
%J Australian Journal of Biological Sciences
%D 1979/07/01
%V 32
%N 3
%P 371-374
%K 
%R https://doi.org/10.1071/BI9790371
%U https://www.publish.csiro.au/paper/BI9790371 
%X Plasma total thyroxine (T 4) concentrations were measured by radioimmunoassay throughout one year in 10 sheep maintained indoors under natural light and consuming a constant amount of feed. Plasma T4 concentrations varied throughout the year, the highest and lowest values occurring in the spring and autumn months respectively. The mean of all observations was 5 ·4±0·1 ,ug/dl. The changes observed did not appear to correlate with changes in ambient temperature, day length or with reported changes in wool growth. 
