Document Detail

Seasonal changes in gonadal hormone levels of adult male canaries and their relation to song.
MedLine Citation:
PMID:  3579838     Owner:  NLM     Status:  MEDLINE    
Samples of song and blood levels of three gonadal hormones, T, DHT, and E2, were taken at monthly intervals from six adult male canaries over a period of 1 year, as these birds went from 12 to 24 months of age. Song variability and addition of new syllable types were maximal during the summer and early fall, with a peak in September. A secondary peak in new syllable acquisition occurred in March. Blood T levels were particularly low during July-August and during February. Thus, a lowering of blood T levels preceded by about 1 month the two marked peaks in new syllable acquisition. Blood levels of the two other hormones were related less obviously to song learning peaks. It is hypothesized that a concurrence of hormonal, neural, and behavioral changes facilitates song learning in adulthood.
F Nottebohm; M E Nottebohm; L A Crane; J C Wingfield
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Behavioral and neural biology     Volume:  47     ISSN:  0163-1047     ISO Abbreviation:  Behav. Neural Biol.     Publication Date:  1987 Mar 
Date Detail:
Created Date:  1987-06-05     Completed Date:  1987-06-05     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  7905471     Medline TA:  Behav Neural Biol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  197-211     Citation Subset:  IM    
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MeSH Terms
Canaries / blood,  physiology*
Dihydrotestosterone / blood*
Estradiol / blood*
Learning / physiology
Testosterone / blood*
Vocalization, Animal / physiology*
Grant Support
Reg. No./Substance:
50-28-2/Estradiol; 521-18-6/Dihydrotestosterone; 58-22-0/Testosterone

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