Document Detail

Two different sensory mechanisms for the control of pupal protective coloration in butterflies.
MedLine Citation:
PMID:  16061248     Owner:  NLM     Status:  MEDLINE    
The butterflies Graphium sarpedon nipponum Fruhstorfer and Papilio xuthus Linné show pupal protective color polymorphism, but the two species appear to have different sensory mechanisms for determining pupal coloration. When light was of sufficient illumination, the larvae of Graphium sarpedon became bright yellowish green pupae on white pupation boards and reddish brown pupae on black pupation boards. The pupal coloration thus strongly depended on the brightness of the pupation site. In addition, larvae became bright yellowish green pupae in complete darkness. From these results, measurement of the illumination suggested that pupal color is determined by the illuminant difference between incidence light from the dorsal direction and ventral light from a paper board; i.e., the sum of the reflected light of the board plus the penetrated light passing through the board. The illuminant difference required for reddish brown coloration was 40 lux or more. The optical signals received through the stemmata during a critical period before formation of the thorax garter (band string) were important for coloration. By contrast, in Papilio xuthus, successive tactile signals from a rough surfaced pupation site during a critical period before and after formation of the garter were important for determining brown pupal coloration.
Sota Hiraga
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Publication Detail:
Type:  Journal Article     Date:  2005-08-02
Journal Detail:
Title:  Journal of insect physiology     Volume:  51     ISSN:  0022-1910     ISO Abbreviation:  J. Insect Physiol.     Publication Date:  2005 Sep 
Date Detail:
Created Date:  2005-10-05     Completed Date:  2006-01-13     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  2985080R     Medline TA:  J Insect Physiol     Country:  England    
Other Details:
Languages:  eng     Pagination:  1033-40     Citation Subset:  IM    
Department of Radiation Genetics, Graduate School of Medicine, Kyoto University, Sakyo, Kyoto 606-8501, Japan.
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MeSH Terms
Butterflies / physiology*
Pigmentation / physiology*
Pupa / physiology*

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