Определение фрагментов насекомых в питании двухцветного кожана в среднем Зауралье

Приведены описание и фотографии для определения фрагментов насекомых, поедаемых Vespertilio murinus L. (Chiroptera). Впервые на территории равнинного Среднего Зауралья изучен рацион этого вида. В составе рациона нами отмечены насекомые 8 отрядов: Diptera (Nematocera, Brachycera), Trichoptera, Hymenoptera (Ichneumonidae), Homoptera (Cicadinea, Aphidina), Coleoptera, Lepidoptera, Hemiptera, Neuroptera (Hemerobiidae, Chrysopidae) и представители кл. Arachnida (Acari). Самые высокие частоты встречаемости и обилия отмечены для Diptera (Nematocera), Coleoptera и Homoptera (Cicadinea). Выявленный состав рациона Vespertilio murinus L. сходен с рационом вида на территории Европы и России, но имеются различия в численном соотношении пищевых групп.
Studies of bats diet are of scientific and practical interest. But in the vast territory of Russia such studies are rare. Therefore, we study the diet structure of the background and highly plastic bat species in the Middle Urals Vespertilio murinus (Linnaeus, 1758) (Chiroptera, Vespertilionidae). The aim of the research was to study the species diet structure and to create an atlas qualifier of prey fragments, using a digital stereo microscope. We collected the material in Skorodumskoye village (Irbit district of Sverdlovsk region, 57°36N, 62°52'E) on the 11th and 16th July, 2012. We studied bat diet analyzing bat droppings. After collecting droppings, the bats were set free. In the laboratory, we selected 5-10 excrements of the close size and form for each individual. Each dropping (sample) was placed on a glass slide in a drop of glycerol. To determine and to count, the residues of arthropods were uniformly distributed on the glass surface (14 cm2 area), graph paper marked up into squares of 1 cm2 was placed under the slide. To create a photo collection of the residues we photographed the most characteristic elements, using the stereo microscope "Olympus SZ61" 2x-4x magnification (2x front lens and 10x eyepieces). Totally, 80 samples were analyzed. For quantitative estimation of the residues we calculated the relative occurrence and abundance of various arthropod taxa. The relative occurrence is the share of samples with the taxon residues in the total number of samples (for each individual). Relative abundance is the share of squares (1 cm2) with the taxon residues in the total number of squares of all found taxa (for each individual). The paper describes fragments of arthropods eaten by V. murinus, and gives photos for identification. Fragments of arthropods found in the droppings were from