Table 1.

Effect of treatment with T3 or T4 on thyroid hormone serum levels, body temperature and absolute and relative mass of thyroid gland.

	Control	T3-treated	T4-treated
Serum T3 concentration (nmol/l)	1.19 ± 0.074	1.69 ± 0.070⁎⁎	1.87 ± 0.130⁎⁎
Serum T4 concentration (nmol/l)	133.7 ± 8.27	20.6 ± 3.10⁎⁎⁎	289.3 ± 23.16⁎⁎⁎
Body temperature change (°C)	0.2 ± 0.10	0.4 ± 0.20	1.0 ± 0.26⁎
Absolute thyroid gland mass (mg)	34.3 ± 8.46	28.6 ± 2.80	28.2 ± 3.90
Relative thyroid gland mass (mg/100 g b.w.)	13.7 ± 1.12	11.6 ± 0.95	11.3 ± 1.36

^⁎p < 0.05 vs. control.

^⁎⁎p < 0.01 vs. control.

^⁎⁎⁎p < 0.001 vs. control.