Wysoki udział badylarki Micromys minutus (Pallas, 1771) w pokarmie uszatki Asio otus (Linnaeus, 1758) w dolinie Raszynki
Journal Title: Fragmenta Naturae - Year 2018, Vol 51, Issue
Abstract
Food composition of the long-eared owl Asio otus was examined from June 2016 to February 2017 in Raszynka river valley (Michałowice commune, Central Poland) near nature reserve Raszynskie Fish Ponds. 1459 individuals of vertebrates were identified. Thirteen species of mammals were detected. Among them, 40.5% was common vole Microtus arvalis, 23.3% a harvest mouse Micromys minutus, 11.9% a root vole M. oeconomus. The proportion of the harvest mouse was unusually high and varied in a wide range: from zero in June by 32.1% in December to 14% in February. Observed variability of diet, in particular, significant fluctuations in the proportion of the harvest mouse, indicates the opportunistic nature of predation of the long-eared owl.
Authors and Affiliations
Przemysław Stolarz, Ewa Liszewska, Grzegorz Lesiński
Keywords
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