Table 2.

Effect of rearing temperature on body, IBAT, and cardiac weights and on IBAT and cardiac norepinephrine content

	Body weight (gm)	IBAT weight		IBAT NE		Cardiac weight		Cardiac NE
	Body weight (gm)	mg	% BW	ng	ng/gm	mg	%BW	ng	ng/gm
Male
18°C (n = 24)	546 ± 8^*	573 ± 27^2-160	0.105 ± 0.004	721 ± 30^*	1286 ± 52^*	1328 ± 17^*	0.244 ± .003	601 ± 27^2-160	450 ± 19
30°C (n = 24)	466 ± 7	490 ± 20	0.105 ± 0.004	393 ± 16	842 ± 54	1103 ± 22	0.237 ± .003	478 ± 29	433 ± 24
Female
18°C (n = 16)	336 ± 5^2-160	373 ± 22^2-160	0.111 ± 0.006	862 ± 35^*	2436 ± 173^*	1016 ± 17^*	0.303 ± .006^2-160	849 ± 56	832 ± 49^2-160
30°C (n = 23)	311 ± 5	319 ± 14	0.103 ± 0.004	524 ± 16	1695 ± 72	886 ± 13	0.286 ± .004	890 ± 31	1008 ± 36

IBAT, Interscapular brown adipose tissue;NE, norepinephrine; BW, body weight.
↵* ^,
↵F2-160 Significant difference (p < 0.001)* and (p < 0.05)** between 18°C- and 30°C-reared rats.