Dietary Habits of the Introduced Cane Toad Bufo marinus (Amphibia: Bufonidae) on Ishigakijima, Southern Ryukyus, Japan1

Autor:	Masako Izawa, Nontivich Tandavanitj, Noriko Kidera, Dae-Hyun Oh, Tetsuo Denda, Nozomi Nakanishi, Aya Satoh, Hidetoshi Ota
Rok vydání:	2008
Předmět:	Larva Multidisciplinary Bufo marinus Amphipoda biology Habitat Ecology biology.animal Paddy field Toad biology.organism_classification Cane toad Predation
Zdroj:	Pacific Science. 62:423-430
ISSN:	1534-6188 0030-8870
DOI:	10.2984/1534-6188(2008)62[423:dhotic]2.0.co;2
Popis:	We examined dietary habits of the introduced cane toad Bufo marinus at three sites representing different types of habitats (pond, forest, and rice paddy) on Ishigakijima Island, southern Ryukyus, Japan. Stomach contents analysis revealed that the toad mostly utilizes terrestrial arthropods, of which hymenopterans (mostly ants), adult coleopterans, hemipterans, and araneans dominated in the frequency of occurrence, hymenopterans in the numerical proportion, and larval lepidopterans, adult coleopterans, and larval dipterans in the volumetric proportion. Comparisons in taxonomic composition of the toad's stomach contents and pitfall and sweeping net samples suggested ignorance or avoidance of Amphipoda by the toad. Our results suggest the possibility of considerable predation pressure of B. marinus upon the native arthropods, and ants in particular, on Ishigakijima Island.
Databáze:	OpenAIRE
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