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http://dx.doi.org/10.11626/KJEB.2019.37.2.177

Physical habitat and chemical water quality characteristics on the distribution patterns of ecologically disturbing fish (Largemouth bass and Bluegill) in Dongjin-River Watershed  

Kang, Yu-Jin (Department of Biological Science, College of Biological Sciences and Biotechnology, Chungnam National University)
Lee, Sang-Jae (Chemical Safety Division, Jeonbuk Regional Environmental Office)
An, Kwang-Guk (Department of Biological Science, College of Biological Sciences and Biotechnology, Chungnam National University)
Publication Information
Korean Journal of Environmental Biology / v.37, no.2, 2019 , pp. 177-188 More about this Journal
Abstract
The objective of this study was to analyze the distribution patterns of two exotic disturbing fish species (largemouth bass, Micropterus salmoides and bluegill, Lepomis macrochirus), their physical habitat features, and chemical water qualities from 13 sites of Dongjin River. The relationships between the fish distributions and water chemistry and physical habitat characteristics (i.e., bottom substrate) were evaluated by comparing dominant vs. absent regions of largemouth bass and bluegill. The relative abundance of the two species decreased sharply with decreased in the water quality in terms of BOD, PO4-P and pH, but not with NO3-N and conductivity. The bluegill showed no difference in habitat preference between the two regions with regard to the bottom structure, while the largemouth bass had significant differences in the bottom structures of silt, coarse gravels and boulders. The dominant species were Zacco platypus (14.6%), Lepomis macrochirus (14.0%), and Micropterus salmoides (9.8%) in the order of relative abundance, indicating that exotic species (24% in total) dominated the fish community, perhaps ensuing large ecological disturbances on the ecosystem. In conclusion, the results of this study suggest that the distribution of the two exotic species may be largely influenced by water quality of organic matter and nutrient pollutions.
Keywords
exotic fish; bluegill; largemouth bass; nutrient pollution; organic matter pollution;
Citations & Related Records
Times Cited By KSCI : 8  (Citation Analysis)
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