Hydrobiologia

, Volume 457, Issue 1, pp 149–154

Larval development of Aeshna cyanea (Müller, 1764) (Odonata: Aeshnidae) in Central Italy

Authors

  • Enzo Goretti
    • Dipartimento di Biologia Animale ed EcologiaUniversit á di Perugia
  • Donatella Ceccagnoli
    • Dipartimento di Biologia Animale ed EcologiaUniversit á di Perugia
  • Gianandrea La Porta
    • Dipartimento di Biologia Animale ed EcologiaUniversit á di Perugia
  • Maria Vittoria Di Giovanni
    • Dipartimento di Biologia Animale ed EcologiaUniversit á di Perugia
Article

DOI: 10.1023/A:1012227400613

Cite this article as:
Goretti, E., Ceccagnoli, D., La Porta, G. et al. Hydrobiologia (2001) 457: 149. doi:10.1023/A:1012227400613

Abstract

A three-year investigation was carried out on the life cycle of Aeshna cyanea (Müller, 1764) (Odonata, Aeshnidae) in temporary freshwater pools in Central Italy. The instars were discriminated by size and scatter plot, based on measurements of labium length, head width, metafemur length, forewing-pad length and total larval body length. The prolarvae instar was derived by Dyar's law. The mean increase value index between following and previous instar was between 1.26 and 1.33 for isometric variables, and around 1.96 for the wing-pad allometric variable. A. cyanea entered diapause mainly at the F-2 instar, placing it almost intermediate between the Southern Spain populations, which usually overwintered in the F-3 instar, and those of England and Central Europe, who spent their last winter in F-1. A. cyanea appeared to be a `summer species', as defined by Corbet (1962), and the population we studied had a semivoltine life cycle.

OdonataAeshna cyaneaCentral Italylarval development

Copyright information

© Kluwer Academic Publishers 2001