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Comparison of Food Habits between the Two Populations of the Fire-Bellied Toad, Bombina orientalis, in Korea  

Ko, Young-Min (Department of Life Science, Cheju National University)
Chang, Min-Ho (Educational Science Research Institute, Cheju National University)
Oh, Hong-Shik (Department of Science Education, Cheju National University)
Publication Information
Korean Journal of Environment and Ecology / v.21, no.6, 2007 , pp. 461-467 More about this Journal
Abstract
The research on food habits of the Fire-bellied toad, Bombina orientalis, distributed in Korea was done targeting a total of 487 individuals in 4 inland areas and 8 areas of Jeju island from April 1990 to September 1992. The survey results showed that there was no difference In the number of the preys of the Korean Fire-bellied per individual between the inland areas and Jeju island and the toad preyed on 1 to 3 individuals on an average, but there happened a case where some Fire-bellied toads in Jeju preyed on as much as 94 individuals. There were 13 orders surveyed in the kinds of prey of the Fire-bellied toad inland, and 10 in Jeju island with a high predation frequency and the number of the preyed individuals of Coleoptera and Hymenoptera. The predation frequency of the two populations was similar in terms of prey taxa, but there appealed a different aspect in the number of the individuals by prey taxa. In short, the inland population of Fire-bellied toad was found to eat more various sorts of preys, not satisfied with limited sorts of preys in comparison with the Jeju toad. There appeared a difference in eating habits by month between the two populations; the feeding duration of the inland population was from May to October, but the Jeju population was from April to September. Among the kinds of prey taxa, Coleoptera and Hymenoptera were equally distributed to the two populations of Korean Fire-bellied toad for this research purpose during the survey period. The number of orders, predation frequency and the number of the prey taxa by one population prey were rather higher in the summer. Therefore, it is concluded that the most active period of predation of the Korean Fire-bellied toad is summer.
Keywords
FREQUENCY OCCURRENCE; SEASONAL DIFFERENCE; INLAND; JEJU ISLAND;
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