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- W2000655624 abstract "The role of ovarian hormones in the expression of parental behavior and in the regulation of LH secretion was investigated in incubating commercial meat-type hens. After ovariectomy, incubating hens continued to incubate eggs normally and brooded day-old chicks given to replace eggs, in a manner similar to sham-ovariectomized control hens. The concentration of plasma LH increased significantly in incubating hens after ovariectomy while the concentration of plasma prolactin remained high. Plasma LH remained depressed in sham-ovariectomized incubating control hens. The increase in plasma LH in incubating hens after ovariectomy (3.92 ± 0.7 ng/ml) was less than that following the ovariectomy of nonincubating, nonlaying hens (5.3 ± 1.2 ng/ml). The two groups of hens differed in that plasma prolactin concentrations were high (527 ± 7.4 ng/ml) in the incubating hens and low (70 ± 9 ng/ml) in the nonincubating hens. Nest deprivation resulted in an increase in plasma LH in both ovariectomized and sham-ovariectomized incubating hens with a significantly larger increase occurring in the ovariectomized hens (8.5 ± 1.41 ng/ml compared to 2.48 ± 0.65 ng/ml). Nest deprivation resulted in a similar rapid decrease in plasma prolactin in both ovariectomized and sham-ovariectomized hens. Replacement of eggs with day-old chicks in ovariectomized or sham-ovariectomized incubating hens resulted in a rapid decrease in plasma prolactin and after 6 days, in an increase in plasma LH in the ovariectomized but not sham-operated hens. It is concluded that once incubation behavior is established, ovarian hormones are not required for its maintenance or the readiness to brood day-old chicks. Ovarian hormones do, however, suppress LH release during incubation while the high concentration of plasma prolactin supplements this suppression." @default.
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- W2000655624 date "1996-01-01" @default.
- W2000655624 modified "2023-09-23" @default.
- W2000655624 title "The Effect of Ovariectomy on Concentrations of Plasma Prolactin and LH and Parental Behavior in the Domestic Fowl" @default.
- W2000655624 doi "https://doi.org/10.1006/gcen.1996.0013" @default.
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