Fatih Tabiat Parkı’ndaki Uzun Kulaklı Orman Baykuşu (Asio otus)’nun Diyetinin İncelenmesi

Pellet analizleri belli bir alanda yaşayan küçük memeli türlerinin tespitinde ve baykuşun o alandaki ekolojik rolünün ortaya konmasında kullanılmaktadır. Bu çalışma Yozgat Fatih Tabiat Parkından Şubat ve Mart 2014 tarihlerinde Asio otus bireyine ait 3 farklı lokaliteden toplanan 706 pellet üzerinde yapılmıştır. Pelletler %3’lük NaOH solüsyonu kullanılarak çözülmüş ve daha sonra kemikler kurutulup teşhis edilmiştir. Bu çalışma ile Yozgat Fatih Tabiat Parkında yaşadığı tespit edilen Asio otus bireylerinin diyetindeki memeli kompozisyonunu belirlemek amaçlanmıştır. Yapılan analizler sonucunda toplam 42377,41 gr biomasa karşılık gelen 1293 bireye/ava ait kemik kalıntısı tespit edilmiştir. Bu bireylerin 3 familya ve 8 cins ait toplam 12 memeli türüne (Crocidura suaveolens, Suncus etruscus, Microtus hartingi/lydius, Microtus levis, Microtus sp., Cricetulus migratorius, Mesocricetus brandti, Apodemus sp., Apodemus sylvaticus, Apodemus witherbyi, Mus macedonicus ve Meriones tristrami) ait olduğu saptanmıştır. Tarım zararlısı olarak bilinen Microtus hartingi/lydius türünün Asio otus’ un diyetinde ilk sırayı aldığı tespit edilmiştir. Besin kompozisyonundaki memeli türlerinin çeşitliliğine bakıldığında orman içinde yuvalanan Asio otus’ un beslenme amacı ile öncelikli olarak tarım ve step alanları tercih ettiği, bununla birlikte ormanlık ve çalılık alanlarda da beslendiği saptanmıştır.

Investigation on Diet of Long-Eared Owl (Asio Otus) Inhabiting Fatih Natural Park (Turkey)

Pellet analyses were used to identify small mammal species in the diet of this owl species in order to reveal itsecological role. In this study, 706 pellets of Asio otus were collected from 3 different localities in Fatih NaturalPark between February and March 2014. Pellets were dissolved by using 3% NaOH solution and then bones weredehydrated and identified. The aim of this study was to determine mammal composition in the diet of Asio otusinhabiting Fatih Natural Park of Yozgat Province, Turkey. Residues of bone from 1293 individuals/preyscorresponding to 42377.41 g biomass in total were detected as the result of analysis. These individuals wereidentified to belonging to 12 mammal species (Crocidura suaveolens, Suncus etruscus, Microtus hartingi/lydius,Microtus levis, Microtus sp., Cricetulus migratorius, Mesocricetus brandti, Apodemus sp., Apodemus sylvaticus,Apodemus witherbyi, Mus macedonicus, and Meriones tristrami) from 3 families and 8 genera. Microtushartingi/lydius, which is known as agricultural pest, was dominant in the diet of Asio otus. When diversity ofmammal species within the food composition was examined, Asio otus nesting in forest was found to primarilyprefer agricultural and steppe areas, and was also found in woody and bushy areas. The use of Asio otus can betaken into consideration when dealing with rodent species known as agricultural pests.

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