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Evolution of the Cuticular Pigmentation as a System for Developmental Timing for Panstrongylus Megistus and Rhodnius Prolixus Adults

  • Vera Lucia Ferreira Brasileiro
  • Leda Narcisa Regis
Research Article

Abstract

A system for developmental timing for Panstrongylus megistus and Rhodnius prolixus (Hemiptera: Reduviidae) adults is presented, using as a marker, the evolution of the cuticular tanning after ecdysis. In both species the setting of the cuticular pigmentation pattern after imaginai moult is a homogeneous process in population, i.e. no individual variations were detected. The system allows one to estimate the exuvial time up to 5 or 7 hr after occurrence. A preferential exuvial period (PEP) was determined in the population under usual rearing conditions by using this system. The PEP runs from 2100 to 0500 hr for P. megistus and from 0100 to 0800 hr for R. prolixus. These data are meaningful for endocrine studies on those species. Studies on PEP under natural environmental conditions would be useful for the control of Chagas’ disease vectors.

Key Words

Triatomines developmental timing cuticular tanning moult rhythm Panstrongylus megistus Rhodnius prolixus 

Résumé

Un système de repère du développment chez les adultes de Panstrongylus megistus et Rhodnius prolixus (Hemiptera: Reduviidae) est présenté, en utilisant comme marqueur l’évolution du tannage cuticulaire après la mue imaginale. Dans les deux espèces l’établissement du modèle de pigmentation cuticulaire après la mue est un processus homogène dans la population c’est-à-dire des variation individuelles significatives n’ont pas été observées. Ce système permet d’estimer avec une précision raisonable le moment ou l’insecte sort de l’exuvie, jusqu’à 5 ou 7 heures après la mue. Ce système nous a permit d’établir la période préférentielle d’exuviation (PPE) dans la population, sous les conditions usuelles d’élevage. Chez P. megistus le PPE s’allonge de 21 heures jusqu’ à 5 heures et chez R. prolixus il va de 1 heure jusqu’à 8 heures. Ces données sont importantes pour les études endocrines de ces espèces. Des études du PPE dans des conditions naturelles d’environnement pourraient être utiles au contrôle des vecteurs de la maladie de Chagas.

Mots Clés

Triatomines repère du développment tannage cuticulaire rythme de mue Panstrongylus megistus Rhodnius prolixus 

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Copyright information

© ICIPE 1992

Authors and Affiliations

  • Vera Lucia Ferreira Brasileiro
    • 1
  • Leda Narcisa Regis
    • 1
  1. 1.Departmento de Biologica Gérai, Centro de Ciências BiológicasUniversidade Federal deRecife, PeBrasil

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