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Table 1 Effects of light treatments on hatching time and hatching performance

From: Monochromatic green light stimulation during incubation shortened the hatching time via pineal function in White Leghorn eggs

Item

Light treatment

SEM

P-value

0L:24D

12L:12D

Average hatching time1, h

492.92a

487.58b

1.60

0.04

Time to 90% hatch2, h

500.00a

494.50b

1.65

0.04

Peak hatching period3, h

6.50

6.75

0.24

0.70

Hatch window4, h

33.00

31.00

0.82

0.29

Hatchability5, %

84.81

85.43

0.65

0.72

Chick quality score6

97.01

98.02

0.75

0.61

  1. Data are the mean of two replicates
  2. a, b Values within a row with different superscripts differ significantly at P < 0.05
  3. 1 Average hatching time was calculated as the mean duration from egg setting to the emergence of chicks for all hatched chicks in a given batch
  4. 2 Time to 90% hatch was the hatching time that 90% of the chicks hatched
  5. 3 Peak hatching period was defined as the duration that 30% to 70% chicks hatched
  6. 4 Hatch window was defined as the time interval from the emergence of the first chick to the last chick
  7. 5 Hatchability was calculated as a percentage of fertile egg number
  8. 6 Chicks were scored for their activity, appearance (plumage, eyes, and legs), and navel area (cicatrisation, retracted yolk, remaining membrane, and yolk) within a total score of 100 [19]