Constant and shifting photoperiods as seasonal cues during larval development of the univoltine damselfly Lestes sponsa (Odonata: Lestidae)

Larvae were reared at 21.5°C from eggs from southernmost Sweden, and fed ad libitum to emergence in four different photoperiodic treatments, intended to represent increasing levels of time stress: constant LD 16:8, corresponding to late April (or August) conditions, a shift after about two weeks from LD 16:8 to 19.5:4.5, coarsely simulating late spring, constant…

Growth, winter preparations and timing of emergence in temperate zone Odonata: control by a succession of larval response patterns

As warm-adapted insects of tropical origin, Odonata cope with cold periods by seasonal regulation and diapause. A model for larval-overwintering species is proposed with three response patterns related to the timing of emergence, which can be predicted from seasonal cues during the last few stadia. For emergence during the present season, there is an often time constrained pre-emergence development, accelerated by long days and higher temperatures.

Aspects of life history of Platycnemis subdilatata (Zygoptera: Platycnemididae) in Northeast Algeria

The determination of seasonal regulation is important to understand how species have adapted to their local environmental conditions. In this study, we investigate the life history of a North African endemic damselfly, Platycnemis subdilatata, in a northeast Algerian population. We combined field and laboratory investigations to assess the embryonic development, larval growth, emergence pattern and…

The effects of environmental warming on Odonata: a review

Climate change brings with it unprecedented rates of increase in environmental temperature, which will have major consequences for the earth’s flora and fauna. The Odonata represent a taxon that has many strong links to this abiotic factor due to its tropical evolutionary history and adaptations to temperate climates. Temperature is known to affect odonate physiology…

Voltinism of Odonata: a review

We classified 542 records of voltinism for 275 species and subspecies of Odonata according to three variables: geographical latitude, systematic position and habitat type. We sorted records according to voltinism—categories being three or more generations per year, two generations per year, one generation per year, one generation in two years and one generation in three…

Support

The International Congress of Odonatology 2017 (ICO2017) will be held in the Gillespie Centre at Clare College Cambridge from 16 to 20 July 2017. Registration will be on Saturday 15 July. Support to attend Letters of invitation Requests for letters of invitation should be made to the Programme Committee Chair Boudjéma Samraoui (support@ico2017.org) Letters will (more…)

Programme/Abstracts

The International Congress of Odonatology 2017 (ICO2017) will be held in the Gillespie Centre at Clare College Cambridge from 16 to 20 July 2017. Registration will be on Saturday 15 July.  You can access the Special sessions by clicking on the links below: Special Session: Vision Special Session: Flight Special Session: Ten years since Philip (more…)

Special Session: vision

International Congress of Odonatology 2017 vision session The International Congress of Odonatology 2017 (ICO2017) will be held in the Gillespie Centre at Clare College Cambridge from 16 to 20 July 2017. Registration will be on Saturday 15 July.   Special Session: vision A special session on dragonfly vision because we are in Cambridge will be (more…)

Special Session: flight

International Congress of Odonatology 2017 flight session The International Congress of Odonatology 2017 (ICO2017) will be held in the Gillespie Centre at Clare College Cambridge from 16 to 20 July 2017. Registration will be on Saturday 15 July.   Special Session: flight A special session on dragonfly flight to celebrate the work of Charlie Ellington (more…)