Article

Article name PHENOLOGY OF THE REGIONALLY CRITICALLY ENDANGERED DRAGONFLY UROTHEMIS EDWARDSII IN THE NATIONAL PARK OF EL KALA, NORTHEAST OF ALGERIA
Authors

Abdelheq Zouaimia, PhD student of the Badji Mokhtar University (23000, Algeria, Annaba, Sidi Amar 12); iD ORCID: https://orcid.org/0000-0002-5652-3148; e-mail: zouaimia.abdelheq@gmail.com
Yasmine Adjami, Dr., Associate Professor of the Department of Biology, Badji Mokhtar University (23000, Algeria, Annaba, Sidi Amar, 12); iD ORCID: https://orcid.org/0000-0002-8439-5841; e-mail: adjamiy@yahoo.fr
Rabah Zebsa, Dr., Associate Professor of the Department of Ecology and Environmental Engineering, University of 8 May 1945 (24000, Algeria, Guelma, 401); iD ORCID: https://orcid.org/0000-0001-8214-9500; e-mail: zebsarabah@gmail.com
Abdeldjalil Youcefi, Dr., Associate Professor of Biology Department, Tamanghasset University Center (11000, Algeria, Tamanrasset, RG33QV7); iD ORCID: https://orcid.org/0000-0003-2003-6767; e-mail: abdeldjalilyoucefi24@yahoo.com
Zinette Bensakhri, Dr., Associate Professor of Nature and Life Sciences Department, Abdelhafid Boussouf University (43000, Algeria, Mila, RP26); iD ORCID: https://orcid.org/0000-0001-5024-1329; e-mail: zinette_29@yahoo.fr
Soufyane Bensouilah, Dr., Associate Professor of the Department of Biology, Amar Telidji University (03000, Algeria, Laghouat, G37 M'Kam); e-mail: soufyaneben@hotmail.com
Hichem Amari, Dr., Associate Professor of the Department of Natural Sciences, Ouargla Higher Normal School (30000, Algeria, Ouargla, X725VQ3); iD ORCID: https://orcid.org/0000-0002-7124-5115; e-mail: amari.hichem@yahoo.fr
Mohamed-Laid Ouakid, Professor, Badji Mokhtar University (23000, Algeria, Annaba, Sidi Amar 12); iD ORCID: https://orcid.org/0000-0002-5957-2228; e-mail: ouakidmomo@outlook.fr
Moussa Houhamdi, Professor, University of 8 May 1945 (24000, Algeria, Guelma, 401); iD ORCID: https://orcid.org/0000-0002-4644-8906; e-mail: houhamdimoussa@yahoo.fr
Hayat Mahdjoub, Dr., Researcher of the Department of Evolutionary Biology and Environmental Studies, University of Zurich (8057, Switzerland, Zürich, Winterthurerstrasse 190); iD ORCID: https://orcid.org/0000-0002-8972-9628; e-mail: hayatmahdjoub@gmail.com
Rassim Khelifa, Dr., Researcher of the Zoology Department, University of British Columbia (Canada, Vancouver, BC V6T 1Z4); iD ORCID: https://orcid.org/0000-0001-6632-8787; e-mail: rassimkhelifa@gmail.com

Reference to article

Zouaimia A., Adjami Y., Zebsa R., Youcefi A., Bensakhri Z., Bensouilah S., Amari H., Ouakid M.-L., Houhamdi M., Mahdjoub H., Khelifa R. 2022. Phenology of the regionally Critically Endangered dragonfly Urothemis edwardsii in the National Park of El Kala, Northeast of Algeria. Nature Conservation Research 7(1): 1–9. https://dx.doi.org/10.24189/ncr.2022.003

Section Research articles
DOI https://dx.doi.org/10.24189/ncr.2022.003
Abstract

In the Mediterranean, Urothemis edwardsii is one of the most threatened dragonfly species with a relict population restricted to the northeast of Algeria. Despite the recent subtle local expansion in the geographic distribution of the species during the past decade, studies on the life history of the species are still lacking. We carried out a study on the phenology of emergence and flight season on Lake Bleu, Northeast-Algeria. Using repeated sampling of exuviae and marking of adults during two seasons (2018 and 2019), we estimated the population size, sex ratio, and the temporal pattern of emergence and flight season. The first year (2018) was considerably drier than the second year (2019). We collected a total of 576 and 887 exuviae and 711 and 655 adults in 2018 and 2019, respectively. The sex ratio at emergence was slightly female-biased with 57.1% in the first year and equal to unity (50.5%) in the second year, respectively. The species started its emergence earlier in the dry year (2018). The emergence of the species was quite asynchronous where 50% of the population emerged after 11 days and 16 days in 2018 and 2019, respectively. The difference in population size (based on exuviae) and the temporal pattern of emergence and flight season were likely due to differences in weather between the two years. The current study provides useful information on the life history and plasticity of U. edwardsii, which could be used for the management of this locally Critically Endangered dragonfly.

Keywords

adult, exuvia, life history, North Africa, Numidia, Odonata, Protected Area, threatened

Artice information

Received: 31.10.2021. Revised: 20.12.2021. Accepted: 23.12.2021.

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