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

Table 1.

Hatching time related characteristics in relation to light treatments and strains of birds.

Factor Level Hatch time1 (h) Time reaching 90% hatch2 (h) Average hatch time3 (h) Peak hatching period4 (h) Hatch window5 (h)
Light treatment (L) Dark 510.50a 500.88a 492.13a 7.31 33.50
Light 505.50b 493.56b 485.40b 6.56 32.75
SEM 1.02 0.64 0.72 0.34 0.87
Strains (S) WL 508.00b 497.25 490.25 6.63 32.00
RIR 504.50c 496.00 488.40 6.25 31.00
CR 511.00a 499.25 487.74 7.63 35.00
BR 508.50b 496.38 488.67 7.25 34.50
SEM 1.65 2.21 2.16 0.46 0.95
P-value L <0.01 <0.01 <0.01 0.07 0.46
S <0.01 0.54 0.48 0.09 0.06
L × S 0.15 0.45 0.80 0.11 0.46

Data are the mean of 2 replicates.

a–cWithin columns, values with no common letters are significantly different (P < 0.05).

Abbreviations: BR, Barred Rock; CR, Columbia Rock; RIR, Rhode Islands Red; WL, White Leghorn.

1

Hatch time was defined as the hatching time that 100% hatch of the batch.

2

Time reaching 90% hatch was defined as the hatching time that 90% hatch of the batch.

3

Average hatch time was defined as the total hatching time of all chicks/the total number of chicks.

4

The peak hatching period was defined as the duration time that 30 to 70% hatch of the batch.

5

Hatch window was calculated by subtracting the hatching time of the last chick from that of the first chick.