thyroxine Archives

Stress and adaptation in beef heifers. 2. Influence of pen conditions on thyroid activity of Shorthorn, Afrikaner and Bonsmara h

1983
Issue: 3
Volume: 13

J.A. Erasmus and J.B. Krause Page: 171 - 175

2025-03-20
flickerleap

Eighteen beef heifers, representing the Bos taurus (Shorthorn), Bos indicus (Afrikaner) and intermediate (Bonsmara) types, were confined to a pen with 4,6 m2 floor space per heifer. A similar number of heifers on veld grazing served as controls. Blood samples…

1994
Issue: 2
Volume: 24

C.J.C. Muller, J.A. Botha, W.A. Coetzer and W.A. Smith Page: 56 - 60

2025-03-20
flickerleap

The effect of a shade structure on some physiological parameters of lactating Dutch-type Friesian cows was determined over three consecutive summer periods. Plasma cortisol concentration of no-shade cows was significantly (P < 0.05) higher than that of shade cows during…