. 2020 Aug 1;99(11):5501–5508. doi: 10.1016/j.psj.2020.06.074

Table 2.

Hatch performance characteristics in relation to light treatments and strains of birds.

Factor	Level	Hatchability of fertile egg (%)	Early death (%)	Late death (%)	Chick weight/egg weight (%)	Activity (%)	Unhealed navel (%)	Dirty feather (%)	Chick quality score
Light treatment (L)	Dark	79.99	5.28	14.73	62.78	86.07	12.92	1.00	97.11
	Light	81.48	4.44	14.09	62.77	87.49	15.93	2.53	96.89
	SEM	2.05	0.95	2.62	0.65	1.92	3.33	0.49	0.48
Strain (S)	WL	85.12^a	2.64^c	12.24^b	69.03^b	90.14^a	7.52^b	2.45	97.52^a
	RIR	86.68^a	8.37^a	4.94^c	69.03^b	89.82^a	8.53^b	0.76	97.93^a
	CR	76.56^b	5.25^b	18.20^a	71.86^a	80.14^b	28.19^a	2.28	95.58^b
	BR	74.58^b	3.18^b,c	22.25^a	72.25^a	87.02^a	13.45^b	1.57	96.97^a,b
	SEM	0.90	0.70	1.38	0.50	1.85	1.99	0.78	0.53
P-value	L	0.15	0.29	0.69	0.78	0.38	0.07	0.05	0.14
	S	<0.01	<0.01	<0.01	<0.01	<0.01	<0.01	0.35	<0.01
	L × S	0.84	0.75	0.77	0.64	0.10	0.08	0.51	0.43

Data are the mean of 2 replicates.

Within columns, values with no common letters (a, b, c) are signiﬁcantly different (P < 0.05).

Abbreviations: BR, Barred Rock; CR, Columbia Rock; Early death, the death from E0 to E10; Late death, the death from E11 to E21; RIR, Rhode Islands Red; WL, White Leghorn.