Levels of T4, T3 and cortisol in the blood serum of the European bison (Bison bonasus) in the winter period.
1. In the blood of 56 European bison, the levels of T4, T3, and the ratio of T3:T4 and cortisol were studied. 2. Between December and March, the T4 level changed from about 53 to 83 ng/ml of blood serum but in April it increased to 90 ng/ml. 3. The level of T3 in this period was 0.817-1.475 ng/ml and in April it was 2.40-3.40 ng/ml. 4. The ratio of T3:T4 was 0.015-0.024 and in April it increased to 0.027-0.052. 5. The level of cortisol changed from 1.00 to 6.70 ng/ml and in April it was from 1.00 to 14.00 ng/ml.
Gill
J
J
Department of Vertebrate Animal Physiology, University of Warsaw, Poland.
D000818:Animals; D001188:Artiodactyla / Q000097:blood*; D003081:Cold Climate; D005260:Female; D006854:Hydrocortisone / Q000097:blood*; D008297:Male; D013045:Species Specificity; D013974:Thyroxine / Q000097:blood*; D014284:Triiodothyronine / Q000097:blood*
D014284:Triiodothyronine; D013974:Thyroxine; D006854:Hydrocortisone