Embryonic development, larval growth and life cycle of Coenagrion puella (Odonata: Zygoptera) from an Austrian pond

摘要: SUMMARY. 1. Newly-laid eggs of Coenagrion puella (L.) from a pond near Herzogenburg (Lower Austria) were kept at constant water temperatures (range c.3.5°C to c.28°C)in the laboratory. Hatching success varied with temperature; no hatched below 12°C and nearly all c.l6°C. time decreased increasing temperature relationship between two variables within range 12–28 °C was well described by power law. The length hatching period less than 12 days. times estimated power-law equations those obtained in field experiments similar. Therefore both could be laboratory data for 12–28°C. 2. maximum number instars egg imago 11; average body increment (mm) per moult proportionately c.26% Dyar's rule applicable. interval moults up seventh instar 12–28°C moulting 8–11 ranged 23 48 days relatively independent temperature. No occurred 12°C. 3. Larval growth logistic variations mean rate 0–2.5% day−1) related <12°C. rates similar data, therefore regression are probably applicable larval field. 4. Information on life cycle C. is briefly reviewed it concluded that has an univoltine cycle.