TABLE 6.

Effect of temperature and feed restriction on organ weight of Cobb 500 male broiler chickens on day 42.¹

Treatments2	Organ weight (% body weight)
	Liver	Abdominal fat3
CTL	1.75b	1.02ab
PF	1.94a	0.96b
Pre-CHS	1.75b	1.14a
Post-CHS	1.44c	1.04ab
AHS	1.53c	0.96b
SEM4	0.05	0.05
P-value5	<0.001	0.048

^a–cIn each column, means with different letters are significantly different (P < 0.05).

¹Data represent the mean value of eight replicate pens of three birds/pen (n = 8).

²Treatments include: (1) control (CTL): birds raised under normal temperature (23°C) from day 29 to 42 and had free access to the diet; (2) acute heat stress (AHS): birds from CTL group after a 2 h heat exposure on day 42 (35°C); (3 and 4) cyclic heat stress (CHS): birds exposed to high temperatures (8 h/day at 35°C; from 9:30 am to 5:30 pm) from day 29 to 42 and sampled before the start (Pre-CHS) or 2 h after the start of CHS (Post-CHS) on day 42; (5) pair-fed (PF): birds raised under the same temperature as CTL group, but fed the same amount of feed as CHS group from day 29 to 42.

³Fat surrounding gizzard, proventriculus, bursa of fabricius, cloaca, and adjacent muscles.

⁴SEM: pooled standard error of means.

⁵P-value: based on one-way ANOVA.