Can human activities have an impact on the demography of the yellow-legged gull, Larus michahellis in North-Eastern Algeria?
February 19, 2022
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| Article Title: | Can human activities have an impact on the demography of the yellow-legged gull, Larus michahellis in North-Eastern Algeria? |
| Authors: | Birouk A., Moulaï R. |
| Affiliation: | 1 Département des Sciences de l’Environnement et des Sciences Agronomiques, Faculté des Sciences de la Nature et de la Vie, Université Mohamed Seddik Benyahia – Jijel, Algérie
2 Laboratoire de Zoologie Appliquée et d’Ecophysiologie Animale, Faculté des Sciences de la Nature et de la Vie, Université de Bejaia, Algérie |
| Abstract: | On the eastern coast of Algeria, two situations arise for Larus michahellis. High demographic growth was observed between 1978 and 2007 at the level of island nesting sites with an annual growth of around 3.89 % and an annual multiplication rate of 1.03 and an important decrease in the breeding population on the same sites, between years 2007 and 2017, with an annual decrease of more than 9% and an annual multiplication rate ( = 0,91) which shows a significant decline in the number of breeding pairs at the island level in the region. The area occupied by couples of Larus michahellis on the islands of the region evolved in the same way. Nesting sites appeared to be saturated in 2007. Less than ten years later (2017), the density has decreased and is approaching that noted in 1978. In the urban area in Jijel, the situation is different, the first breeding pairs appeared in 2000 with 5 pairs, and from this date, urban nesting did not stop increasing, reaching a figure of 328 pairs in 2018. In 20 years, the urban Gulls of the city of Jijel have experienced considerable annual growth (23%). Human activities through the management of household waste seem to be at the origin of the modifications noted in the level of the population dynamics of the Yellow-legged Gull. |
| Keywords: | Larus michahellis, demographic dynamics, islands, urban environment, refuse dump |
| *Correspondence: | Amine Birouk, Laboratoire Département des Sciences de l’Environnement et des Sciences Agronomiques, Faculté des Sciences de la Nature et de la Vie, Université Mohamed Seddik Benyahia – Jijel, Algéria; E-mail address: brk.amine@gmail.com;Tel: 00213770147709 ; Riadh Moulaï, e-mail: moulai741@hotmail.com. |
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