Document Detail

Photovoltaic effects in hornets are correlated with the time of day.
MedLine Citation:
PMID:  15291301     Owner:  NLM     Status:  MEDLINE    
This study deals with voltage values recorded off the cuticle of live specimens of the Oriental hornet Vespa orientalis (Hymenoptera, Vespidae). The relevant measurements were taken between the two tips of their bodies at various hours of the day and were made on a total of 90 worker hornets. Recorded voltage values varied within a range of 60-180 mV, with the lower values measured during the morning hours and the afternoon and the highest values during the noon hours. Measurements were made by direct contact of the electrodes with the hornet cuticle and did not prove lethal to the measured specimens. An additional 60 live hornets were measured in the same fashion but in the dark. The values recorded in the dark varied between 40 and 70 mV and displayed considerable fluctuations but were not found to be dependent on the time of measurement. The distribution of the voltage values in hornets measured at various hours in the daytime closely resembled that of the global radiations (in W/m2) on the same days the measurements were taken.
Anna Sverdlov; Jacob S Ishay
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Photochemistry and photobiology     Volume:  79     ISSN:  0031-8655     ISO Abbreviation:  Photochem. Photobiol.     Publication Date:  2004 Jun 
Date Detail:
Created Date:  2004-08-04     Completed Date:  2004-09-07     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0376425     Medline TA:  Photochem Photobiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  510-4     Citation Subset:  IM    
Department of Physiology and Pharmacology, Sackler Faculty of Medicine, Tel Aviv University, Ramat Aviv, Israel.
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MeSH Terms
Circadian Rhythm*
Time Factors
Wasps / physiology*,  radiation effects*

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