Document Detail


Pinealectomy and LL abolished circadian perching rhythms but did not alter circannual reproductive or fattening rhythms in finches.
MedLine Citation:
PMID:  1473194     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
In the subtropical finch, spotted munia (Lonchura punctulata), circanual rhythms (of gonads, fattening, feeding) have been demonstrated in an information-free environment of continuous illumination (LL), rendering it an ideal model for research on the physiology of the circannual clock. In an attempt to understand the involvement, if any, of the circadian system in the genesis of circannual rhythms, we studied the effect of pinealectomy (LL 15 lux) and strong continuous illumination (LL 300 lux), both known to abolish circadian rhythms, on the circadian perch-hopping rhythm and on the circannual rhythm of reproduction and fattening in the same birds. While both pinealectomy and LL 300 lux treatments abolished the circadian rhythm of motor activity, they had no effect on the circannual rhythms of gonadal size and fattening. If the endogenous circadian rhythm in perch-hopping can be taken to reflect the circadian clock mechanism associated with gonadal functioning, present results suggest that circannual rhythm of reproduction in spotted munia is independent of circadian events.
Authors:
K Pant; A Chandola-Saklani
Related Documents :
21506894 - Effect of static force on bone conduction hearing thresholds and comfort.
10762034 - Circadian rhythm of erg in iguana iguana: role of the pineal.
9236254 - Stimulation on the positive phase of hippocampal theta rhythm induces long-term potenti...
20615944 - Correct biological timing in arabidopsis requires multiple light-signaling pathways.
16627284 - Coevolution of slow-fast populations: evolutionary sliding, evolutionary pseudo-equilib...
3950794 - Spectral luminous efficiency functions in the mesopic range.
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Chronobiology international     Volume:  9     ISSN:  0742-0528     ISO Abbreviation:  Chronobiol. Int.     Publication Date:  1992 Dec 
Date Detail:
Created Date:  1993-02-01     Completed Date:  1993-02-01     Revised Date:  2003-11-14    
Medline Journal Info:
Nlm Unique ID:  8501362     Medline TA:  Chronobiol Int     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  413-20     Citation Subset:  IM    
Affiliation:
Reproductive and Wildlife Biology Unit, Garhwal University, Srinagar, India.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Animals
Birds / physiology*
Body Weight / physiology,  radiation effects
Circadian Rhythm / physiology*,  radiation effects
Light
Male
Motor Activity / physiology,  radiation effects
Periodicity*
Pineal Gland / physiology
Reproduction / physiology,  radiation effects
Testis / anatomy & histology,  physiology

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


Previous Document:  Chronolab: an interactive software package for chronobiologic time series analysis written for the M...
Next Document:  Time and sex in the male mouse: temporal regulation of infanticide and parental behavior.