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. 2019 Aug 15;14(8):e0221083. doi: 10.1371/journal.pone.0221083

Fig 3. Plasma corticosterone between 450 and 470h of incubation, corresponding with light or dark periods for the 16L:8D treatment, in broiler chicken embryos incubated under continuous light (24L), 16h of light, followed by 8h of darkness (16L:8D), or continuous darkness (24D).

Fig 3

The black box indicates 16L:8D’s dark period. a,b Values within a time point with different superscripts differ significantly at P≤0.05.