Table 4.

Reproductive organ variables of laying ducks at the end of high-temperature and recovery periods.¹

Trait	Treatment
	Control	Pair-fed	Constant high temperature	Intermittent high temperature	SEM	P value
Day 21
Oviduct length, cm	38.60c	41.88bc	46.93ab	48.50a	2.13	0.02
Oviduct mass, g	53.40	47.42	45.17	49.204	3.72	0.54
Ovary mass, g	57.21	54.85	53.91	54.86	4.51	0.97
Dominant follicle number	5.20	4.75	5.29	4.83	0.37	0.64
Dominant follicle mass, g	47.53	47.06	45.79	45.01	3.98	0.97
Day 55
Oviduct length, cm	45.86	43.57	49.36	48.29	1.78	0.12
Oviduct mass, g	50.34	42.23	51.05	49.76	3.43	0.26
Ovary mass, g	46.99	45.68	51.90	45.15	4.78	0.73
Dominant follicle number	4.86	4.86	5.43	5.00	0.42	0.74
Dominant follicle mass, g	37.35	38.65	43.25	38.09	4.62	0.53

^{a, b}Values within a row with different superscripts differ significantly at P < 0.05.

¹ n = 6 for each treatment.