Effect of Heat Exposure on Gene Expression of Feed Intake Regulatory Peptides in Laying Hens

Table 2

Laying hens’ productive performance.

	Control	Heat stress	P value
BW change (g/hen)	47.54±7.39^a	−150.54±8.87^b	<0.001
Feed intake (g/hen/day)	111.02±11.58^a	58.12±3.23^b	0.005
Laying rate (%)	95.83±2.03^a	89.29±1.19^b	0.032
Average egg mass (g)	56.06±0.88^a	50.56±0.31^b	0.001
Egg production (g/hen/day)	53.70±0.79^a	45.24±0.63^b	<0.001
Shell thickness (mm)	0.38±0.01^a	0.32±0.01^b	<0.001
Feed/egg (g/g)	2.07±0.22^a	1.29±0.08^b	0.016

^{a, b}Means in the same line with different superscript differ significantly, 𝑃<0.05; Values indicate mean ± SEM. For feed intake, BW change, laying rate, egg production, and feed/egg analyses, 𝑛=4/treatment; for shell thickness, 𝑛=12.