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. 2023 Mar 17;14:1132728. doi: 10.3389/fphys.2023.1132728

FIGURE 2.

FIGURE 2

Serum corticosterone levels in Drakes (A) and Hens (B). Only ducks treated with corticosterone showed a significant increase in serum corticosterone levels compared to controls at 7 and 15 days after onset of treatment. ** = p < 0.01.