TY - JOUR
T1 - Plasma concentrations of corticosterone relative to photoperiod, oviposition, and ovulation in the domestic hen
AU - Johnson, A. L.
AU - van Tienhoven, A.
N1 - Funding Information:
’ To whom correspondence should be sent. A preliminary report of portions of this study has appeared in Anat. Rec. 193(3), 576 (1979). This work was supported in part by NIH Grant HD12101.
PY - 1981/1
Y1 - 1981/1
N2 - Blood samples were drawn from laying hens via a brachial vein cannula at 2-hr intervals for 34 to 72 hr, and plasma was assayed for corticosterone (B). Concentrations of B, relative to photoperiod and irrespective of the time during the laying sequence, were highest 4 hr after the onset of the photoperiod, and had decreased to lowest values 4 hr before the onset of darkness (photoperiod 14L:10D). There was a surge of B coincident with the time of oviposition. The elimination of the oviposition-related peak of B (by examining concentrations during the morning of the first ovulation in the sequence) shows that the diurnal peak of B actually occurs approximately 2 hr after the onset of light, and that there is no surge of B 4 to 8 hr preceding ovulation as occurs for progesterone, the estrogens, and testosterone.
AB - Blood samples were drawn from laying hens via a brachial vein cannula at 2-hr intervals for 34 to 72 hr, and plasma was assayed for corticosterone (B). Concentrations of B, relative to photoperiod and irrespective of the time during the laying sequence, were highest 4 hr after the onset of the photoperiod, and had decreased to lowest values 4 hr before the onset of darkness (photoperiod 14L:10D). There was a surge of B coincident with the time of oviposition. The elimination of the oviposition-related peak of B (by examining concentrations during the morning of the first ovulation in the sequence) shows that the diurnal peak of B actually occurs approximately 2 hr after the onset of light, and that there is no surge of B 4 to 8 hr preceding ovulation as occurs for progesterone, the estrogens, and testosterone.
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U2 - 10.1016/0016-6480(81)90025-3
DO - 10.1016/0016-6480(81)90025-3
M3 - Article
C2 - 7194200
AN - SCOPUS:0019406844
SN - 0016-6480
VL - 43
SP - 10
EP - 16
JO - General and Comparative Endocrinology
JF - General and Comparative Endocrinology
IS - 1
ER -