. 2023 May 18;10:1133752. doi: 10.3389/fvets.2023.1133752

Table 3.

Comparison of egg quality between translucent and opaque groups of Rhode Island Red-White across age.

Traits/age	75 week		79 week		83 week
	Translucent	Opaque	Translucent	Opaque	Translucent	Opaque
Translucent grade	3.21 ± 0.71^a	2.21 ± 0.57^b	3.12 ± 0.66^a	2.58 ± 0.96^b	2.86 ± 0.72^a	2.08 ± 0.75^b
Egg weight (g)	62.87 ± 3.85^a	60.18 ± 4.02^b	61.29 ± 5.15	59.58 ± 5.26	63.21 ± 3.88^a	60.14 ± 5.13^b
Water loss rate (%)	1.83 ± 0.48	1.69 ± 0.40	1.17 ± 0.33	1.06 ± 0.30	2.08 ± 0.41^a	2.41 ± 0.37^b
Egg shape index	1.37 ± 0.05	1.36 ± 0.04	1.37 ± 0.04	1.35 ± 0.04	1.35 ± 0.07	1.38 ± 0.06
Eggshell strength (N)	33.68 ± 6.72^a	28.14 ± 6.78^b	30.29 ± 6.16	30.43 ± 6.32	28.81 ± 7.06	26.71 ± 6.47
Eggshell thickness (μm)	325.20 ± 22.56	318.00 ± 28.42	323.14 ± 25.28	321.00 ± 28.21	319.42 ± 29.09	318.13 ± 29.14
Eggshell membrane thickness (μm)	13.48 ± 3.96	12.19 ± 4.26	17.93 ± 6.79	17.33 ± 5.17	11.69 ± 4.11	10.40 ± 3.69
Eggshell weight (g)	7.81 ± 0.63^a	7.26 ± 0.51^b	7.84 ± 0.61	7.71 ± 0.89	7.58 ± 0.56	7.37 ± 0.53
Eggshell proportion (%)	12.43 ± 1.12	12.02 ± 1.00	12.63 ± 0.74	12.96 ± 0.99	11.98 ± 0.69	12.12 ± 0.72
Haugh unit	82.14 ± 3.99	82.40 ± 2.54	76.99 ± 3.07	77.71 ± 4.61	82.23 ± 4.37	80.12 ± 5.61
Egg white weight (g)	36.21 ± 3.14	35.34 ± 3.85	35.57 ± 3.51	34.74 ± 3.90	35.75 ± 2.79^a	33.52 ± 4.16^b
Yolk color	9.90 ± 1.25	9.57 ± 1.32	11.21 ± 0.57^a	10.60 ± 0.94^b	11.63 ± 0.49	11.60 ± 0.51
Yolk weight (g)	17.57 ± 1.34	17.04 ± 1.22	17.76 ± 1.48	17.58 ± 1.77	18.81 ± 1.39^a	17.65 ± 1.66^b

All values are mean ± standard deviation. ^{a, b}Within each row, means values with different letters indicate statistical differences between translucent groups and opaque groups of the same week (P < 0.05).