Etude du régime alimentaire de deux rapaces nocturnes dans la région de Ghardaïa. Cas du Hibou ascalaphe Bubo ascalaphus (Savigny, 1809) et du Hibou des marais Asio flammeus (Pontoppidan, 1763)

Abstract

Le présent travail porte sur l’étude du régime alimentaire de le Hibou ascalaphe et le Hibou des marais dans la égion de Ghardaïa (deux stations d’étude : Sebseb pour le Hibou ascalaphe et Hassi El-Gara pour le Hibou des marais). L’étude du régime alimentaire de B. ascalaphus dans la région de Ghardaïa a fait ressortir six catégories-proies sont recensées notamment Arachnida, Insecta, Reptilia, Aves, Rodentia, et Chiroptera. Les espèces les plus consommées sont Prionatheca coronata (AR = 14,0 %) et Gerbillus nanus (AR = 13,0 %). Tandis que l’analyse des pelotes de rejection d’Asio flammeus nous a permis de recenser 7 catégories qui sont Arachnida, Insecta, Reptilia, Aves, Batrachia, Rodentia, et Chiroptera. Dans le menu trophique de ce rapace, les chiroptères sont les plus consommées (AR = 39,3 %) (Hassi ElGara). Parmi les espèces-proies, on cite Myotis alcathoe (AR = 37,8 %) et Gerbillus nanus (AR = 5,4 %). A partir de cette étude nous constatons que le Hibou ascalaphe (E = 0,82) et le Hibou des marais (E = 0,70) sont considérés comme des prédateurs généralistes.Abstract : This work concerns the study of the food mode of the Desert Eagle Owl and the Short Eared Owl in the areas of Ghardaïa (two stations of study: Sebseb for the Short Eared Owl and Hassi El-Parked for the Short Eared Owl). The goal to study the trophic menu of these two raptors night. The study of the food mode of B. ascalaphus in the area of Ghardaïa emphasized six category-preys are in particular listed Arachnida, Insecta, Reptilia, Aves, Rodentia, and Chiroptera. a behavior rodontophage by its strong consumption of the rodents with a rate of 46.5% has (Sebseb). The species more consumption are Prionatheca coronata (RA = 14.0 %) followed by Gerbillus nanus (RA = 13.0%) While the analysis of the peltes of rejection of Asio flammeus has allowed listed 7 to us categoires are in particular listed Arachnida, Insecta, Reptilia, Aves, Batrachia, Rodentia, and Chiroptera. in the trophic menu of this raptor. The chiroptères are represented (RA = 39.3 %) (Hassi El-Garra). Among the most consumed preys, Myotis alcathoe (RA = 37.8 %) followed by Gerbillus nanus (RA = 5.4 %). From this study we note that the Desert Eagle Owl (E = 0.82) and the Short Eared Owl (E = 0.70) are regarded as predatory general practitioners.

This work concerns the study of the food mode of the Desert Eagle Owl and the Short Eared Owl in the areas of Ghardaïa (two stations of study: Sebseb for the Short Eared Owl and Hassi El-Parked for the Short Eared Owl). The goal to study the trophic menu of these two raptors night. The study of the food mode of B. ascalaphus in the area of Ghardaïa emphasized six category-preys are in particular listed Arachnida, Insecta, Reptilia, Aves, Rodentia, and Chiroptera. a behavior rodontophage by its strong consumption of the rodents with a rate of 46.5% has (Sebseb). The species more consumption are Prionatheca coronata (RA = 14.0 %) followed by Gerbillus nanus (RA = 13.0%) While the analysis of the peltes of rejection of Asio flammeus has allowed listed 7 to us categoires are in particular listed Arachnida, Insecta, Reptilia, Aves, Batrachia, Rodentia, and Chiroptera. in the trophic menu of this raptor. The chiroptères are represented (RA = 39.3 %) (Hassi El-Garra). Among the most consumed preys, Myotis alcathoe (RA = 37.8 %) followed by Gerbillus nanus (RA = 5.4 %). From this study we note that the Desert Eagle Owl (E = 0.82) and the Short Eared Owl (E = 0.70) are regarded as predatory general practitioners