In this study, pellet compositions of Long-eared Owl (Asio otus) were analysed. The primary aim of this study was to investigate the diet composition of Long-eared Owl in high altitude steppe in summer. Compositions of 130 pellets of Longeared Owl were used in the study. 147 preys (1.13 preys per pellet) which belong to 9 different taxa were found in pellet composition. A significant part of the diet in study area consisted of small mammals. Only two remains of birds were recorded from pellets. Microtus sp. was found important prey in the diet of Long-eared Owl (F = 81.63 %, B = 78.21%). Since Microtus sp. is the favourite prey of Long-eared Owl, this situation causes a negative correlation with the prey variety in diet composition. For this reason, FNB and Shannon-Wiener indices had low levels, Shannon-Wiener (H') value was found to be low for Longeared Owl.

Conventionally stained and C-banded karyotypes of Guenther's vole (Microtus guentheri), Major's pine vole (Microtus majori) and Common vole (Microtus arvalis) were studied from Turkey. Diploid chromosome numbers of M. guentheri, M. arvalis and M. majori were found as 2n=54 and NFa=52, 2n=46 and NFa=68 and 2n=54 and NFa=56, respectively. All chromosomes of M. guentheri were pericentromeric C-band. In Microtus arvalis (obscurus cytotype) and Microtus majori karyotypes, autosomal chromosomes were heterochromatin C band positive and negative band. In M. arvalis (obscurus cytotype), sex chromosome was C band negative. In this study, heterozygote chromosome was not found in the obtained autosomal chromosome set of M. arvalis. M. majori has enlarged heterochromatin block from centromere to telomere on the long arm of X chromosome. Y chromosome was completely heterochromatin. ÖZET Bu çalışmada, Güentheri tarla faresi (Microtus guentheri), Kısa kulaklı kır faresi (Microtus majori) ve Yaygın tarla faresi (Microtus arvalis) türlerinin standart karyotipleri ve kromozomların C-bant özellikleri belirlendi. M. guentheri türünün diploid kromozom sayısı (2n) = 54 ve otozomal kromozomların kol sayısı (NFa) = 52, M. arvalis (obscurus sitotip) türünün 2n = 46 ve NFa = 68, M.majori türünün 2n = 54 ve NFa = 56 şeklindedir. M. guentheri otozomal ve eşey kromozomlarda pericentromerik C-bant olduğu belirlendi. Microtus arvalis (obscurus sitotip) ve Microtus majori karyotiplerinde otozomal kromozomlar C bant pozitif ve negatif şeklindedir. M. arvalis türünde X ve Y kromozomu C bant negatif özelliktedir. M. majori karyotipinde X kromozomunun uzun kolunda sentromerden telomere doğru genişlemiş heterokromatin blok bulunmaktadır. Y kromozomu ise tamamen heterokromatindir.