La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Status of the preys of the Cattle Egret (Bubukus ibis L.) in the region of Chief (Algeria). (2013)
Auteurs :	Ahmed Mohammedi, Auteur ; Salaheddine Doumandji, Auteur
Type de document :	Article
Dans :	La Terre et la Vie (68(3-4) SEP-DEC 2013)
Article en page(s) :	283-289
Mots-clés :	Algérie
Résumé :	Known as a predatory bird and especially insectivorous, the Cattle Egret was subject to very few studies dealing with the nature of its prey in relation with agriculture (helpful vs pest species), hence our study conducted from 2006 to 2010 in the region of Chief, involved the examination of wet pellets collected from a heronry located in a public garden considered as a permanent habitat for this species for over 25 years. A review of 480 pellets revealed the presence of 14 093 preys with an average of 29.36 preys in each pellet, 94 % of these preys were insects. Among the whole identified preys 2057 (78.34 %) were species harmful to vegetation, while beneficial species were 2057 (14.6 %) predators, 268 (1.9 %) parasitoids and 189 (1.34 %) pollinators. Although harmful and beneficial species were consumed throughout the year, the correspondence analysis showed that harmful preys are most numerous in the diet of this bird during the period from April to October, the auxiliary from November to February, the pollinators during the spring season and the other species, mainly represented by those present in water bodies and public land fills in the winter.

Lundi , mardi et jeudi de 9h à 12h et de 13h à 17h00 : ouverture au public ...