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http://dx.doi.org/10.11626/KJEB.2013.31.4.419

Ecological Characteristics and Chemical Gradients in Two Different Loach Populations-Misgurnus anguillicaudatus and Koreocobitis rotundicaudata  

Shin, Eun Ju (Department of Biological Science, College of Biological Sciences and Biotechnology, Chungnam National University)
Choi, Ji-Woong (Department of Biological Science, College of Biological Sciences and Biotechnology, Chungnam National University)
An, Kwang-Guk (Department of Biological Science, College of Biological Sciences and Biotechnology, Chungnam National University)
Publication Information
Korean Journal of Environmental Biology / v.31, no.4, 2013 , pp. 419-428 More about this Journal
Abstract
The objectives of this research were to determine ecological characteristics and chemical gradients in two different loach populations-Misgurnus anguillicaudatus ($M_a$) and Koreocobitis rotundicaudata ($K_r$). Eight chemical parameters were compared to test the chemical preferences between the two species. The population of Kr occurred more in better water quality, compared to the $M_a$-population. The $M_a$-population co-occurred more with tolerant species (TS) and omnivores, whereas the $K_r$-population co-occurred more with sensitive species (SS) and insectivores. The differences in the tolerance and trophic composition matched well with the result of stream health assessment, based on the multi-metric model of Index of Biological Integrity (IBI). The IBI value in habitat with the $M_a$-population was "19.6" (range: 8~40) indicating a fair condition, and the IBI values of $K_r$-population was 29.4 (range: 12~40) indicating good condition. Similar results were found in physical habitat health analysis (QHEI). Overall, data analysis showed that the $M_a$-population belong to the tolerant species and $K_r$-population belong to sensitive species in the tolerance classification.
Keywords
Misgurnus anguillicaudatus; Koreocobitis rotundicaudata; tolerance guild;
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