Relationships between prolactin, LH and broody behaviour in bantam hens
| Autor: | Peter J. Sharp, R. W. Lea, R. J. Sterling, M. C. Macnamee, H. C. Pedersen |
|---|---|
| Rok vydání: | 1988 |
| Předmět: |
Ovine prolactin
Baseline values medicine.medical_specialty Lh secretion Time Factors Chemistry Endocrinology Diabetes and Metabolism Plasma prolactin Luteinizing Hormone Prolactin Broodiness Nesting Behavior Endocrinology Internal medicine Broody behaviour medicine Animals Female Incubation Chickens hormones hormone substitutes and hormone antagonists |
| Zdroj: | The Journal of endocrinology. 118(2) |
| ISSN: | 0022-0795 |
| Popis: | The interactions between broody behaviour and changes in concentrations of plasma prolactin and LH were investigated in bantam hens. Adoption of newly hatched chicks caused incubating hens to leave their nests and prevented plasma prolactin decreasing as rapidly as in hens deprived of their nests and not given chicks. Further, the hens allowed to rear chicks came back into lay later (P< 0·001) than the hens not allowed chicks. Plasma prolactin decreased and plasma LH increased in hens deprived of their nests: these changes were reversed when the hens re-nested. The changes in plasma LH and prolactin in nest-deprived and re-nesting birds were not always synchronous; this was particularly clear immediately after nest deprivation when the increase in plasma LH preceded the decrease in the plasma prolactin. Readiness to incubate disappeared between 48 and 72 h after nest deprivation and corresponded with the time when plasma prolactin decreased to baseline values. Administration of ovine prolactin depressed (P J. Endocr. (1988) 118, 279–286 |
| Databáze: | OpenAIRE |
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