Document Detail


Correlations of life-span variation parameters in 128 successive generations of Drosophila melanogaster with changes in atmospheric pressure and geomagnetic activity.
MedLine Citation:
PMID:  15864403     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Correlations between the parameters of life-span (LS) distribution of Drosophila melanogaster, including mean LS (MLS) and the time of 10 and 90% population mortality, and some geophysical parameters that are usually beyond the control of researchers dealing with laboratory cultures, including atmospheric pressure, solar activity indices (Wolf's sunspot numbers and 2,800-MHz radio flux), and geomagnetic activity (planetary index, K(p)), were studied. Geophysical data were obtained from free-access official web sites of the National Oceanic & Atmospheric Administration of the US Department of Commerce and the Institute of Terrestrial Magnetism and Radiowave Propagation of the Russian Academy of Sciences. The geophysical parameters were calculated only for the period corresponding to 10 days of preimaginal development of the flies from egg to imago. Canonical correlation analysis, calculation of the non-parametric Spearman rank-order correlation coefficients, and graphical data analysis were used. Highly significant correlations between parameters of LS distribution in males and females and environmental factors, such as the atmospheric pressure on the 4th and 5th day of development and geomagnetic activity indices (K(p)) on the 6th and 10th day of development were found, with correlation coefficients varying from 0.31 to 0.37 (P<0.02). Assuming a causal relationship between geophysical factors and LS, it may be hypothesized that energetically weak environmental factors determine the formation of LS oscillatory dynamics in laboratory populations. The possible mechanisms underlying the contribution of these environmental factors to the LS variation in successive generations are discussed.
Authors:
D M Izmaylov; L K Obukhova; A A Konradov
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Publication Detail:
Type:  Journal Article     Date:  2004-11-30
Journal Detail:
Title:  International journal of biometeorology     Volume:  49     ISSN:  0020-7128     ISO Abbreviation:  Int J Biometeorol     Publication Date:  2005 May 
Date Detail:
Created Date:  2005-05-02     Completed Date:  2005-12-13     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0374716     Medline TA:  Int J Biometeorol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  337-44     Citation Subset:  IM    
Affiliation:
N.M. Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, 4 Kosygin Street, Moscow 119991, Russia. izm-dm@yandex.ru
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MeSH Terms
Descriptor/Qualifier:
Animals
Atmospheric Pressure*
Drosophila melanogaster / physiology*
Female
Longevity*
Magnetics*
Male
Periodicity
Solar Activity

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