Notes on the Life History of the Dobsonfly, Protohermes grandis THUNBERG (Megaloptera, Corydalidae)

NDL Digital Collections
  • YOSHIDA,Toshio
    Biological Institute, Faculty of Liberal Arts, Shinshu University:(Present address)Fukui Aquaculture Center of Ayu
  • SUGIMOTO,Katashi
    Biological Institute, Faculty of Liberal Arts, Shinshu University:(Present address)Fukui Aquaculture Center of Ayu
  • HAYASHI,Fumio
    Biological Institute, Faculty of Liberal Arts, Shinshu University:(Present address)Department of Biology, Faculty of Science, Tokyo Metropolitan University

Bibliographic Information

Other Title
  • ヘビトンボの生活史に関する知見

Search this article

Description

Life history of the dobsonfly, Protohermes grandis, was investigated in the Metoba River of Nagano Prefecture from 1976 to 1981. From surveys in the field and laboratory it was inferred that this insect takes 3 years to complete its life cycle. Dissections of larval alimentary canals revealed that the dobsonfly preys on larvae of Ephemeroptera, Trichoptera and Diptera (Chironomidae) during immature stages. Mature larva which had passed the 3rd winter and turned dark in body color was observed to leave water for pupation in early summer. The larva creeped under a stone or fallen tree, made up the pupating cellar in the wet earth and then was transformed into pupa. It climed up on various plants near the pupating cellar to undergo the adult eclosion 4 to 5 days after pupation. The adult dobsonfly was proved to be nocturnal and observed to feed on sap of trees as well as small insects.

Journal

  • 昆蟲

    昆蟲 53 (4), 734-742, 1985-12-25

    東京昆蟲學會

Details 詳細情報について

Report a problem

Back to top