Home range sizes and nychthemeral habitat uses by the Northern Shoveler Spatula clypeata on prenuptial stopovers in Vendée marshes, western France - La Rochelle Université
Article Dans Une Revue Ornis Fennica Année : 2024

Home range sizes and nychthemeral habitat uses by the Northern Shoveler Spatula clypeata on prenuptial stopovers in Vendée marshes, western France

Résumé

The wetlands of Marais breton (MB) and Marais poitevin (MP) on the French Atlantic coast are commonly used by several duck species, especially as stopover sites during the prenuptial migration. Understanding the ecological requirements of Anatidae at spring stopover sites is important to define appropriate management actions that might have a carry over effect on the subsequent reproduction success. This study focused on the Northern Shoveler Spatula clypeata, a species that regularly visits the two marshes during spring and fall migrations and is highly dependent on freshwater invertebrates as the food resource. Fifteen Northern Shovelers were equipped with GPS/GSM tags and monitored during their stopover in both marshes in 2020 and 2021. The aims of the study were to understand the habitat use on stopover sites and relate home range (HR) size with characteristics of the feeding habitats (such as freshwater invertebrates' density and diversity). The HR area of the studied individuals was mainly constituted of ponds in MB (83% of the HR) and wet meadows in MP (71% of the HR). The Northern Shovelers equipped with tag spent more than 72 consecutive hours in 31 wetlands, using them during the day, at night or all day. The diurnal visited sites were deep ponds that were sparsely vegetated and dominated by microcrustaceans, whereas the nocturnal visited sites were wet meadows or ponds with high aquatic vegetation cover and high invertebrate taxonomic diversity. The 31 described sites appeared to be rich in freshwater invertebrates, with no significant difference in invertebrate densities between the diurnal and nocturnal sites. HR sizes were highly homogenous between the two study sites (MB and MP), between sexes or between age classes. In conclusion, according to this study, an appropriate HR for the Northern Shoveler at spring stopover is 8.49 ± 5.95 km² (mean ± standard error).
Fichier principal
Vignette du fichier
Moreau et al 2024.pdf (1.13 Mo) Télécharger le fichier
Origine Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-04736969 , version 1 (15-10-2024)

Identifiants

Citer

Axelle Moreau, Clément Rousseau, Pierrick Bocher, Christine Dupuy, Sébastien Farau. Home range sizes and nychthemeral habitat uses by the Northern Shoveler Spatula clypeata on prenuptial stopovers in Vendée marshes, western France. Ornis Fennica, 2024, 101, pp.00-00. ⟨10.51812/of.142037⟩. ⟨hal-04736969⟩

Collections

CNRS UNIV-ROCHELLE
0 Consultations
0 Téléchargements

Altmetric

Partager

More