Author(s): Itämies, J.
Title: On the food of Rana arvalis Nilss. in Central Finland
Year: 1982
Volume: 21
Pages: 169-174.
Abstract: The stomach contents of 41 specimens of the moor frog (Rana arvalis Nilsson) collected at Hailuoto, an island near the town Oulu, Central Finland were investigated. The frogs were divided into four size groups: 24 mm, 24-29 mm, 30-39 mm and =40 mm. Diptera dominated in the stomachs of the smallest groups (38.8 and 40.4%) with Coleoptera as the next most frequent (31.6 and 36.8%). In the two largest groups the order was reversed (Diptera 23.2 and 9.3%, Coleoptera 41.7 and 46.7%). In frogs over 40 mm Araneae (26.7%) proved to be the second most favoured in the diet, Diptera figuring far below
these. Average number of food items eaten in a size group was significantly lower in the larger frogs as compared to the smaller ones.Subject: zoology
Discussed taxa:Phylum: Chordata
Class: Amphibia
Ordo: Anura
Family: Ranidae
Genus: Rana
Species: arvalis
Journal: Vertebrata hungaricaJournal abbreviation: Vert. hung.ISSN: 0506-7839Publisher: Népművelési Propaganda Iroda, BudapestEditor(s): Dely, O. G. & Nemes, I.