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Journal of Environmental Information Science Vol.41 No.5 (2013年)
[pp.121-126]
‹Research Report›Comparison of food habit among three sympatric species of frogs in paddy fields
Shingo FUJIMOTO, Takuya ITO, Yumi NAKAJIMA, Naoko YOSHIDA and Masahide YUMA （Ryukoku University ）
Abstract:
Multiple species living sympatrically have the potential to affect each other’s feeding behavior, although there is a paucity of information about the comparative food habits of frogs. In this study, we examine food habits of three sympatric frog species in paddy fields. Throughout the season, there was no diel variation in stomach content index among three frog species. Compositions of stomach contents in weight ratio were similar between three frog species. Frogs nomally predated on Formicidae in August and September, although prey organisms varied with season. We suggest that frogs prey non-selectively on foods according to their abundance, and also without any interspecific interaction for food selection.
Key Word:
food habit, sympatric, interspecific comparison, similarity