Ankara, Beytepe’de Suburban Bir Bölgede Baykuş Peletlerinden Asio Otus Memeli Kalıntılarının Analizi

B eytepe, Ankara’da suburban bir bölgede kulaklı orman baykuşu Asio otus’a ait 138 pelet analiz edildi. Sonuçlar, yaz aylarında kulaklı orman baykuşunun beslenme tercihinin ve hangi küçük memelileri tercih ettiğini değerlendirmemizi sağladı. Memeli kalıntıları baykuşun tüm avlarında bulundu. Günther tarlafaresi, Microtus guentheri, kulaklı orman baykuşunun ana besinidir, Microtus guentheri avların %43,7’sini, tanımlanamayan Microtus sp. türü %17,4’ünü, Apodemus flavicollis %11,3’ünü, Mus macedonicus %10,8’ini, Microtus levis %7,5’ini, Rattus norvegicus %4,2’sini, Crocidura suavolens %2,8’ini, Nannospalax nehringi %1,4’ünü, Cricetulus migratorius %0,9’unu içermektedir. Pelet içerikleri kulaklı orman baykuşunun avın büyüklüğüne göre her pelette 1 ile 5 arası ava rastlanmıştır. Her peletin ortalama avı 1,72 bulunmuştur. Toplamda 9 tür baykuşun besinine katılmıştır, 213 avlanmış örnek toplamda biyomas olarak 8383,5 g bulunmuştur

Anahtar Kelimeler:

Kulaklı orman baykuşu, pelet, rodent, küçük memeli, biyomas, Türkiye

Analysis of Mammal Remains from Owl Pellets Asio Otus , in A Suburban Area in Beytepe, Ankara

138 owl pellets of long-eared owl, Asio otus were analyzed in the suburban area in Beytepe, Ankara. The re- sults showed the preferred diet of long-eared owl in summer time and evaluated owl prefence for small mam- mals in suburban areas. Mammals constituted all preys of the owl. The Günther’s vole, Microtus guentheri, was the main food of the long-eared owl, Microtus guentheri constituted 43.7% of the prey items, Microtus sp., can not identified, 17.4%, Apodemus flavicollis 11.3%, Mus macedonicus 10.8%, Microtus levis 7.5%, Rattus norvegi- cus 4.2%, Crocidura suavolens 2.8%, Nannospalax nehringi 1.4%, Cricetulus migratorius 0.9%. Pellets’ content indicated that the long-eared owl consumes 1 to 5 preys per pellet which depends on the size of prey species. Average prey per pellet was found to be 1.72. A total of 9 species contributed to diet, 213 prey individuals with a total amount of 8383.5 g in biomass were found.

Keywords:

Long-eared owl, pellets, rodents, small mammals, biomass, Turkey,

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