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La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

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Titre :	Nest location influences hatching success in the Socotra Cormorant (Phalacrocorax nigrogularis) on Siniya Island, United Arab Emirates (2015)
Auteurs :	S. B. Muzaffar, Auteur ; R. Gubiani, Auteur ; S. Benjamin, Auteur
Type de document :	Article
Dans :	Wildlife Research (42(1) 2015)
Article en page(s) :	13-18
Langues:	Anglais
Résumé :	Context. Nest location is an important determinant of reproductive success in many seabirds. Better understanding of breeding ecology of threatened seabirds could help in their conservation. Aims. We evaluated nest location and reproductive success in the globally Vulnerable, regionally endemic, Socotra cormorants on Siniya Island, United Arab Emirates, in relation to multiple habitat factors to assess the relative influence of each. Methods. We measured hatching success, as an indication of reproductive success, on 14 study plots during the 2011-12 breeding season. We measured distances from each study plot to the nearest tree, road, predation area, sandy beach and lagoon. We used multiple logistic regression to determine the extent to which these explanatory factors influenced hatching success. We used an information theoretic approach to select the best model. Key results. Hatching success was significantly related to tree cover, distance from beach and distance from heavily depredated areas (AIC(c) weight = 0.613). Nests were significantly deeper (13.14 +/- 0.35 cm) in unshaded areas compared with areas shaded by trees (10.8 +/- 0.31 cm) (ANOVA: F-2,F-12 = 24.93, P

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