DIET AND TROPHIC NICHE OVERLAP OF THE MOOR FROG (Rana arvalis Nilsson, 1842) AND THE COMMON FROG (Rana temporaria L., 1758) FROM POLAND

摘要: During our study we identified 79 prey items in the trophic spectrum of Moor frog (Rana arvalis Nilsson, 1842) with average number per stomach - 5.27 and 100 Common temporaria L., 1758) 3.84. In both species most important category is Coleoptera (Insecta). Other animals are from Hemiptera, Hymenoptera Diptera orders (Insecta) as well non- insect invertebrates (Gastropoda, Arachnida, Myriapoda) which also play significant role. Both frogs consume almost only terrestrial prey. The niche breadths for quite high 23.70; Rana 12.25). estimated overlap between moderate (63.5%), but numeric proportion all taxa occurring stomachs do not differ significantly species. polyphagous zoophages, like other amphibian they probably consuming mobile objects come contact can swallow.