Journal of Chemical Ecology

, Volume 9, Issue 11, pp 1449–1464 | Cite as

Regeneration and biosynthesis of dytiscid defensive agents (Coleoptera: Dytiscidae)

  • Howard W. Fescemyer
  • Ralph O. Mumma
Article

Abstract

The defensive secretions of the dytiscid species,Agabus seriatus (Say) andAgabus obtusatus (Say), were qualitatively and quantitatively analyzed by high-pressure liquid chromatography. The intrinsic ability ofA. Seriatus andA. Obtusatus to regenerate their prothoracic gland defensive secretions under laboratory conditions was determined by analyzing the secretions every seventh day for five weeks. Both beetles regenerated ∼ 80% of their prothoracic gland components within two weeks.A. seriatus was injected with [4-14C]cholesterol and after a three-week regeneration period 7.5% of the14Clabel was found in the steroidal defensive secretion from the prothoracic glands.

Key words

Coleoptera Dytiscidae Agabus seriatus Agabus obtusatus defensive secretions steroids regeneration pygidial glands prothoracic glands cholesterol 

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Copyright information

© Plenum Publishing Corporation 1983

Authors and Affiliations

  • Howard W. Fescemyer
    • 1
  • Ralph O. Mumma
    • 1
  1. 1.Pesticide Research Laboratory and Graduate Study Center Department of EntomologyThe Pennsylvania State UniversityUniversity Park

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