Hivernage de l’Erismature à tête blanche (Oxyura leucocephala) en Algérie

New data on the wintering of White-headed Ducks Oxyura leucocephala in Algeria

Abstract:

Winter census of the White-headed Duck in the wetlands where this species may occur allowed us to update the numbers present in winter in this country. A certain stability in winter numbers (around 1,000 individuals) was observed. Within the 240 censused sites, only some 20 harboured the species. The highest numbers were counted in the wetlands of Northeastern Algeria. In the west, increasing numbers were detected.

Atoussi, S., Rezkallah, I., Khemis, M., Merzoug, A., Telaili, S. & Houhamdi, M. 2017. Nouvelles données sur l’hivernage de l’Erismature à tête blanche Oxyura leucocephala en Algérie. Alauda 85: 29-36.
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Lire aussi:

Big wintering flock of White-headed Duck (Oxyura leucocephala) at Merja Fouarat, Morocco.

Le statut de l’Érismature à tête blanche (Oxyura leucocephala) dans les zones humides du nord-est algérien.

Première hivernage de l’Érismature à tête blanche (Oxyura leucocephala) à Oglat Edaïra, Algérie.

Érismature à tête blanche (Oxyura leucocephala), Marais de la Macta (Oran), Algérie, 06/2017 (Ali Mehadji)
Érismature à tête blanche (Oxyura leucocephala), Marais de la Macta (Oran), Algérie, 06/2017 (Ali Mehadji)

Le statut de l’Érismature à tête blanche (Oxyura leucocephala) dans les zones humides du nord-est algérien

Halassi, I., Elafri, A., Belhamra, M. & Houhamdi, M. (2016). Répartition et abondance de l’Érismature à tête blanche Oxyura leucocephala dans les zones humides du nord-est algérien. Alauda 84: 25–34.
PDF in ResearchGate

Abstract:

Status of the White-headed Duck Oxyura leucocephala in Northeast Algeria. The globally threatened White-headed Duck is one the most rare duck species in the Western Palearctic. Its distribution in Algeria is mainly restricted to the northeastern part of the country and the Hauts-Plateaux. In 2013 and 2014, 694 individuals were counted. The studied sites harboured distinct numbers in winter and in summer of the two years. The p-values (Kruskal Wallis test) were lower than 0.05. The Lake Tonga showed the highest numbers in winter and the Boussedra wetland in summer. The results indicated a stable occurrence in the studied areas without any difference between the two years. The PCA analysis showed a significant correlation between the distribution of this species and three following main factors: vegetation, surface area and water depth at the Boussedra wetland, Lake Tonga and Garaet Hadj-Taher. The lower occurrence in other parts of the studied areas, particularly on the Hauts-Plateaux, is mainly the consequence of drying out process and habitat degradation.

Érismature à tête blanche (Oxyura leucocephala), Marais de la Macta, Mostaganem, Algérie (‎Ali Mehadji‎)

Érismature à tête blanche (Oxyura leucocephala), Marais de la Macta, Mostaganem, Algérie (‎photo: Ali Mehadji‎)

Hivernage de l’Érismature à tête blanche (Oxyura leucocephala) à Oglat Edaïra, Algérie

L’Érismature à tête blanche (Oxyura leucocephala) est une espèce classée en danger d’extinction dans la liste rouge de l’IUCN. En Algérie, l’espèce ne se reproduit que dans quelques sites et hivernent dans environ 14 sites dans différentes régions.

L’espèce a été observée en hivernage à Oglat Edaïra, Wilaya de Nâama. C’est la première fois! Ni la “Fiche descriptive sur les zones humides Ramsar” relative au site, ni l’étude de l’équipe de Samraoui (Samraoui & Samraoui 2008; Samraoui et al. 2011) cite l’Érismature à tête blanche comme hivernante dans le site.

La zone humide Oglat Edaïra, connue aussi sous le nom de “Lac de Aïn Ben Khelil” est un lac saumâtre et saisonnier situé à 30 km au sud-ouest de la ville de Nâama.

Références (PDFs in ResearchGate.net):

Samraoui, F., Alfarhan, A.H., Al-Rasheid, K.A.S. & Samraoui, B. (2011). An appraisal of the status and distribution of waterbirds of Algeria: indicators of global changes? Ardeola 58: 137–163.

Samraoui, B., & Samraoui, F. (2008). An ornithological survey of Algerian wetlands: Important Bird Areas, Ramsar sites and threatened species. Wildfowl 58: 71–98.

Abdelkader Allali (Conservation des forets de Batna).

Érismature à tête blanche (Oxyura leucocephala)

Érismature à tête blanche (Oxyura leucocephala), Oglat Edaïra, Ain Ben Khelil, Naâma, Algérie. (photo: Abdelkader Allali).

Oglat Edaïra, Ain Ben Khelil, Naâma

Oglat Edaïra, 3 Km de la commune de Ain Ben Khelil, Naâma.

Status and diurnal activity budget of non-breeding White-headed Ducks (Oxyura leucocephala) in Algeria

Meziane, N., Samraoui, F. & Samraoui, B. 2014. Status and diurnal activity budget of non-breeding White-headed Ducks Oxyura leucocephala in Algeria. Ostrich 85: 177–184. doi: 10.2989/00306525.2014.964790
PDF in ResearchGate.net

Abstract:

In Algeria, the Globally Endangered White-headed Duck Oxyura leucocephala is resident throughout the year in the coastal wetlands of north-east Algeria and the Hauts Plateaux, where it occupies habitats that range from freshwater ponds and brackish marshes to hypersaline lakes. In autumn and winter, at two study sites sleeping (49% and 68%) and resting (9% and 20%) dominated, whereas feeding (7% and 10%) represented a minor proportion of, diurnal activities. There was no marked seasonal change in the activity pattern, as would be expected for a resident bird. The breeding and winter distributions of the species were similar, but seasonal and diel patterns of dispersion among habitats remain poorly known. Human encroachment on wetland habitat, habitat degradation and illegal hunting in protected areas are the major threats to the persistence of the species and probably similar threatened species in Algeria.

Plus d’articles sur l’Érismature à tête blanche (Oxyura leucocephala).

White-headed Duck (Oxyura leucocephala)

White-headed Duck Oxyura leucocephala (Wikimedia commons, user: BS Thurner Hof)

Diurnal behaviour of breeding White-headed Duck (Oxyura leucocephala) at Lake Tonga, Algeria

Lazli, A., Nouari, I., Chater, N. & Moali, A. (2014). Diurnal behaviour of breeding White-headed Duck Oxyura leucocephala at Lake Tonga, North-East Algeria. Revue D’écologie 69 (2): 131–141.

Résumé :

Le comportement diurne de l’Érismature à tête blanche Oxyura leucocephala a été étudié au lac Tonga, lac d’eau douce peu profond situé dans le Nord-Est algérien, au cours de deux saisons de reproduction. Les rythmes d’activités diurnes de 173 oiseaux ont été compilés, de la période de pré-nidification jusqu’à la mue postnuptiale. Des budgets d’activités séparés ont été construits pour chacun des mâles et des femelles d’Érismature. Durant la saison de reproduction, le sommeil s’est avéré être la principale activité diurne pour les mâles (40 %), ce qui reflète l’avantage de la thermorégulation au cours du repos pendant la journée. Les femelles se nourrissent plus que les mâles (respectivement 26 % et 19 %) au cours de la période de pré-nidification, indiquant ainsi leur besoin d’acquérir des nutriments et de l’énergie pour la production d’œufs et l’incubation. Les parades nuptiales et le comportement agonistique, plus importants pendant la pré-nidification (période de ponte et d’incubation), indiquent que certains mâles tenteraient de copuler avec d’autres femelles, alors que d’autres essayeraient de protéger leurs propres femelles contre cela. L’augmentation du temps imparti à la toilette à partir de juin et juillet pour les deux sexes indique le début du phénomène de mue. L’activité alerte est plus importante pendant la période postnuptiale. En effet, mâles et femelles d’Érismature allouent un même temps à la protection des poussins et des juvéniles contre différents ennemis. Ce travail présente des données récentes et inédites sur l’éco-éthologie d’une espèce menacée pendant la saison de reproduction et dont les études sur le sujet restent peu développées dans la nature, en particulier pour chaque sexe.

White-headed Duck (Oxyura leucocephala)

White-headed Duck Oxyura leucocephala (Wikimedia commons, user: BS Thurner Hof)

Biodiversity and phenology of the Rallidae and the Anatidae in Garaet Hadj Tahar (NE Algeria)

Bara, M., Merzoug S., Bouslama Z. & Houhamdi M. (2013). Biodiversity and phenology of the Rallidae and the Anatidae in Garaet Hadj Tahar (Norteast of Algeria). Annals of Biological Research 4 (6): 249-253. PDF

Abstract:

During this study which was carried out between November 2011 and October 2012 in Garaet Hadj Tahar (Northeast of Algeria), we counted the Anatidae and the Rallidae individuals, then we calculated the ecological indexes (Abundance, specific richness, diversity index and equitability index), in order to evaluate the biodiversity in this ecosystem. 14 species were noted which belong to six genera: Fulica, Gallinula, Porphyrio, Anas, Aythya and Oxyura, among them two species cited as threatened species (Ferruginous duck Aythya nyroca and White-headed duck Oxyura leucocephala). The high value of Shannon-Weaver and equitability indexes were recorded during the wintering period with a value of 2.219 and 0.6 respectively.

Garaet Hadj-Tahar (Skikda, Algeria)

Garaet Hadj-Tahar (Skikda, Algeria). From Metallaoui & Houhamdi (2010).

The geographical situation of Garaet Hadj-Tahar (Skikda, Algeria) taken from figure 1 in: Metallaoui, S., & Houhamdi, M. (2010). Biodiversité et écologie de l’avifaune aquatique hivernante dans Garaet Hadj-Tahar (Skikda, Nord-Est de l’Algérie). Hydroécologie Appliquée 17: 1-16.

Diurnal activity and breeding ecology of the White-headed Duck at Lake Tonga, Algeria

Chettibi, F., Khelifa, R., Aberkane, M., Bouslama, Z., & Houhamdi, M. (2013). Diurnal activity budget and breeding ecology of the White-headed Duck Oxyura leucocephala at Lake Tonga (North-east Algeria)Zoology and Ecology 23 (3): 183-190.  DOI: 10.1080/21658005.2013.817516
PDF in ResearchGate.net

Abstract:

The White-headed Duck Oxyura leucocephala is one of the most threatened duck species in the world. In the last decade ecology, behaviour and breeding biology of this species attracted considerable scientific interest across its geographic range. In order to fill some gaps in the knowledge of North African populations, diurnal and seasonal activity budget and breeding ecology of the species were investigated at Lake Tonga (Ramsar site), El Kala, Algeria. The species is resident at this site and its numbers were the highest in January. Throughout the year, ducks spent the following proportion of time on these activities daily: 62.41% resting, 18.50% locomotion, 11.04% feeding, 5.56% preening, 0.53% flying, 0.13% agonistic behaviour and 1.83% courting. Substantial differences were noted in the activity budget between wintering and breeding seasons. Resting and locomotion constituted 89% of all the activities in the wintering season, while resting, locomotion and feeding were dominant activities in the breeding season accounting for 86%. Throughout the year, resting peaked in the afternoon, while feeding reached its maximum at noon. As to the breeding ecology, ducks started laying eggs in early May and hatching in the middle of June. The mean clutch size was 9.41 ± 5.67 eggs, ranging between 1 and 11 eggs with a super clutch of 22 eggs giving the evidence of conspecific brood parasitism. Hatching success was low (55%) because of nest desertion, egg predation and egg infertility. The clutch size and hatching were positively correlated to the nest depth, the mean of which was 7.92 ± 4.94 cm.

Nest of the White-headed Duck (Oxyura leucocephala) containing nine eggs

Nest of the White-headed Duck (Oxyura leucocephala) containing nine eggs, Lake Tonga, Algeria.