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Diurnal time budget of Gadwall Anas strepera in Guerbes-Sanhadja wetlands (Skikda, northeast Algeria)

2015; Taylor & Francis; Volume: 25; Issue: 2 Linguagem: Inglês

10.1080/21658005.2015.1031503

2165-8013

Merzoug Abdelghani, Mouslim Bara, Moussa Houhamdi,

Species Distribution and Climate Change

In this study, we investigated the wintering strategy of the Gadwall Anas strepera (Anatidae) that had never been studied in the northeast of Algeria. Observations were performed during two wintering seasons (2007/2008 and 2008/2009) in order to determinate the phenology and diurnal behavior of the Gadwall in Garaet Hadj Tahar, Garaet El Haoues, and Garaet Beni M'hamed (Guerbes-Sanhadja wetlands). The peak number of individuals was recorded during January in all three study sites of the Guerbes-Sanhadja wetlands: 1710 individuals in Garaet Hadj Tahar, 89 in Garaet Beni M'hamed, and 15 in Garaet El Haoues. The dominant diurnal activity recorded was swimming (32.6%), which was followed by sleeping (24.7%), feeding (19.9%), preening (13.6%), flying (6.7%), and antagonistic activity (2.2%).Pilkosios anties (Anas strepera) žiemojimas buvo tiriamas 2007/2008 ir 2008/2009 metais šiaurės rytinėje Alžyro dalyje, Garaet HadjTahar, Garaet BeniM'hamed ir Garaet El Haoues šlapynėse, priklausančiose Guerbes-Sanhadja ekologiniam kompleksui. Fenologija ir elgsena buvo tiriama stebint paukščius dienos metu. Visose trijose tyrimo vietose didžiausias paukščių skaičius užregistruotas sausio mėnesį: 1710 individų Garaet HadjTahar, 89 individai Garaet BeniM'hamed ir 15 individų Garaet El Haoues šlapynėje. Dieną daugiausiai laiko (32,6%) antys plaukiojo, 24,7% – miegojo, 19,9% – maitinosi, 13,6% – valėsi plunksnas, 6,7% laiko skraidė, 2,2% laiko ančių elgesys buvo agresyvus.