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http://dx.doi.org/10.13047/KJEE.2017.31.5.444

Comparison of the Bacterial and Fungal Colonies from Rana dybowskii which Collected from Inside and Outside Frog Farms and Identification of the Bacteria from the Tadpoles  

Kwon, Sera (Dept. of Biology, Kangwon National University)
Park, Daesik (Dept. of Biology, Kangwon National University)
Choi, Woo-Jin (Dept. of Biology, Kangwon National University)
Park, Jae-Jin (Dept. of Biology, Kangwon National University)
Cho, Han-Na (Dept. of Biology, Kangwon National University)
Han, Ji-Ho (Division of Science Education, Kangwon National University)
Lee, Jin-Gu (Gyeonggido Agricultural Research and Extension Services)
Koo, Kyo-Soung (Dept. of Biology, Kangwon National University)
Publication Information
Korean Journal of Environment and Ecology / v.31, no.5, 2017 , pp. 444-454 More about this Journal
Abstract
There are many ongoing studies of infectious diseases as the major factor responsible for global declining of the amphibian population. Although some point out the amphibian rearing facilities like frog farms as one of the important sources of harboring and spreading amphibian infectious pathogens in the wild, there have been few related studies in South Korea. In this study, we investigated the bacterial and fungal colonies on the skin and in the internal organs of frogs and tadpoles collected inside and outside of Dybowski's brown frog farms in Inje, Goesan, and Gongju to compare the difference according to the region and between inside and outside the farm. We also intended to classify the bacteria collected from the tadpoles into species by analyzing 16s rDNA gene sequences. The result showed that the number of bacterial colonies found in the skin and gut of frogs and the number of fungal colonies found in the skin and liver of frogs collected in Goesan was significantly greater than those in the frogs in Inje. However, there was no difference between the frogs collected inside and outside of farms in both regions. In the case of tadpoles, the number of fungal colonies in the tadpoles collected from Gongju was greater than that in the tadpoles collected from Inje. The comparison of inside and outside frog farms showed that there were more bacterial colonies on the skin of the tadpoles collected from inside than outside the frog farm in Inje and more bacterial colonies in the organs of the tadpoles collected from outside than inside the farm in Gongju. The frogs with higher condition factor (body weight/snout-vent length*100) showed fewer bacterial colonies on the skin and fewer fungal colonies in the heart, but there were no significant relationships in tadpoles. We identified the total of 15 genera and four phyla of bacteria, but the difference according to regions and between inside and outside farm was not evident. The result of this study indicates that the different conditions according to the locality of farm and between inside and outside farm cause the difference in the population sizes of bacterial and fungal colonies and that it can affect the overall health condition of Dybowski's brown frogs in the farm. Moreover, the result suggests that effective disease control in the facility is greatly necessary to ensure successful operation of amphibian rearing facility and to prevent the possible spread of diseases from the facility to the wild.
Keywords
AMPHIBIAN; FROG FARM; PATHOGEN; DISEASE;
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Times Cited By KSCI : 4  (Citation Analysis)
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