| Egg production of cockatiels (Nymphicus hollandicus) is influenced by number of eggs in nest after incubation begins. | |
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MedLine Citation:
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PMID: 8812374 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Cockatiel eggs hatch asynchronously because most eggs are laid after continuous incubation begins. We manipulated numbers of eggs in the nest after cockatiels began incubating to determine whether the number of eggs in the nest influenced clutch size. We also measured plasma prolactin 2, 7, 12, and 17 days after egg laying began to determine whether clutch size covaried with prolactin concentration. We found that total egg production was stimulated in pairs for which the rate of egg accrual was reduced by egg removal, while total egg production was inhibited in pairs for which the egg accrual rate was increased by egg addition. Female, but not male, plasma prolactin concentrations correlated negatively with egg production on day of lay 17 but not before. We conclude that egg production in incubating cockatiels is influenced by feedback from the number of eggs in the nest and that clutch termination may be signaled by rising prolactin levels in females. |
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Authors:
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J R Millam; B Zhang; M E el Halawani |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: General and comparative endocrinology Volume: 101 ISSN: 0016-6480 ISO Abbreviation: Gen. Comp. Endocrinol. Publication Date: 1996 Feb |
Date Detail:
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Created Date: 1996-10-17 Completed Date: 1996-10-17 Revised Date: 2003-11-14 |
Medline Journal Info:
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Nlm Unique ID: 0370735 Medline TA: Gen Comp Endocrinol Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 205-10 Citation Subset: IM |
Affiliation:
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Department of Avian Sciences, University of California, Davis 95616, USA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Eggs* Female Male Ovulation / physiology* Parrots / physiology* Prolactin / blood |
| Chemical | |
Reg. No./Substance:
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9002-62-4/Prolactin |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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