Document Detail


Egg production of cockatiels (Nymphicus hollandicus) is influenced by number of eggs in nest after incubation begins.
MedLine Citation:
PMID:  8812374     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
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.
Authors:
J R Millam; B Zhang; M E el Halawani
Related Documents :
15230324 - Effects of dietary zinc exposure on the life history of the parthenogenetic springtail ...
11726164 - Development of a sandwich enzyme-linked immunosorbent assay for the detection of egg re...
17305824 - The causes and consequences of variation in offspring size: a case study using daphnia.
9802244 - Interactions of mating, egg production and death rates in females of the mediterranean ...
1797564 - Inhibition of food intake by omeprazole in the chicken.
20352054 - A brief review on how pregnancy and sex hormones interfere with taste and food intake.
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  General and comparative endocrinology     Volume:  101     ISSN:  0016-6480     ISO Abbreviation:  Gen. Comp. Endocrinol.     Publication Date:  1996 Feb 
Date Detail:
Created Date:  1996-10-17     Completed Date:  1996-10-17     Revised Date:  2003-11-14    
Medline Journal Info:
Nlm Unique ID:  0370735     Medline TA:  Gen Comp Endocrinol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  205-10     Citation Subset:  IM    
Affiliation:
Department of Avian Sciences, University of California, Davis 95616, USA.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Animals
Eggs*
Female
Male
Ovulation / physiology*
Parrots / physiology*
Prolactin / blood
Chemical
Reg. No./Substance:
9002-62-4/Prolactin

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Characteristics of the uptake of 3,5,3'-triiodo-L-thyronine and L-thyroxine into red blood cells of ...
Next Document:  Changes in Vitellogenin expression during captivity-induced stress in a tropical anole.