| Titre : | Wintering waterbirds in North Africa 1990-2017 |
| Auteurs : | Mohamed Dakki, Auteur ; Geneviève Robin, Auteur ; Marie Suet, Auteur ; Abdeljebbar Qninba, Auteur ; Mohammed A. El Agbani, Auteur ; Asmaâ Ouassou, Auteur ; Rhimou El Hamoumi, Auteur ; Hichem Azafzaf, Auteur ; Wed A. L. Ibrahim, Auteur ; Khaled Etayeb, Auteur ; Mohamed S. Sayoud, Auteur ; Nadjiba Bendjedda, Auteur ; Laura Dami, Auteur ; Pierre Defos du Rau, Auteur |
| Type de document : | Chapitre |
| Mention d'édition : | Wadden Sea Flyway Initiative p/a CWSS |
| Année de publication : | 2022 |
| Format : | 63-67 |
| Langues: | Anglais |
| Mots-clés : | TdV ; Afrique Nord ; Oiseaux d'eau ; Hivernage ; Migration ; Evolution ; Dénombrement |
| Résumé : |
In North Africa, waterbird counts have been carried out since the 1960s but only became regular in the 1980s. However, the lack of stable funding, of suitable optical equipment, of a stable and reliable national network of counters in the five countries, and of facilities to cover large areas and move from one site to another, meant that surveys never covered all the sites and were not really carried out regularly. It was with the setting up of the Mediterranean Waterbirds Network in 2012 that a certain regularity of counts was established, with financial and technical support, and with the development of the Medwaterbirds database. This database contains 36,436,391 records but suffers from over 60% missing data for 1990-2017. In order to accommodate this missing data issue, a new imputation method, LORI, was applied to the Medwaterbirds data set using multiple site- and/or year-specific covariates. North African trends for 16 species were assessed and discussed with respect to the corresponding trends at the international level (AEWA CSR 8).
Because the issue of missing data is an acute one in ecological monitoring, we argue that our modelling tool could be useful for many studies on wildlife. The joint work with other Mediterranean countries, the possible monitoring of breeding birds in the Mediterranean, and synchronous counts with the East Atlantic Flyway countries could all be considered as lines of action to improve these analyses, but also their interpretation in relation to the status of populations. |
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Documents numériques (1)
 Dakki et al. - Wintering waterbirds in North Africa 1990-2017.pdf Adobe Acrobat PDF |
