Social environment during egg laying: Changes in plasma hormones with no consequences for yolk hormones or fecundity in female Japanese quail, Coturnix japonica.

Corticosterone Overall, pair-housed females had slightly higher plasma CORT concentrations than group-housed females, but the difference did not reach statistical significance (F (1, 28.13) Treatment = 3.61, p = 0.07; Table 1 , Fig 2B ). 10 minute restraint significantly increased plasma CORT concentrations (F (1, 53.93) Sample = 137.06, p < 0.01; Table 1 , Fig 2B ), but the increase did not differ between social treatments (F (1, 52.90) Treatment * sample = 0.02, p = 0.88; Fig 2B ).

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