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http://dx.doi.org/10.11626/KJEB.2014.32.4.319

The Characteristics of Fish Community and Food Web in Eutrophic Agricultural Reservoir, Jeondae  

Lee, Eui-Haeng (Rural Research Institute, Korea Rural Community Corporation)
Chang, Kwang-Hyeon (Department of Environmental Science and Environmental Engineering, Kyung Hee University)
Seo, Dong-Il (Department of Environmental Science and Environmental Engineering, Kyung Hee University)
Choi, Jong-Yun (Department of Biological Sciences, Pusan National University)
Joo, Gea-Jae (Department of Biological Sciences, Pusan National University)
Kim, Mirinae (Rural Research Institute, Korea Rural Community Corporation)
Shin, Jae Hoon (Rural Research Institute, Korea Rural Community Corporation)
Son, Misun (Yeongsan River Environment Research Center, National Institute of Environmental Research)
Nam, Gui Sook (Rural Research Institute, Korea Rural Community Corporation)
Publication Information
Korean Journal of Environmental Biology / v.32, no.4, 2014 , pp. 319-326 More about this Journal
Abstract
Fish community was investigated in eutrophic Jeondae agricultural reservoir from April to November 2012. The food web structure of major fish species of Jeondae reservoir showed that due to serious organic pollution, the hyper-eutrophic condition with high chemical oxygen demand (COD), chlorophyll-a (Chl-a), total nitrogen (TN) and total phosphorus (TP), as estimated by stable isotope analysis. Total of 679 individuals were collected from the reservoir, and 9 species were identified. Interestingly, Lepomis macrochirus and Hemiculter eigenmanni known as less sensitive to pollution and water quality deterioration, dominated the reservoir, and their relative abundances were 38% and 27%, respectively. Further, the analysis of the stomach contents revealed that main food source of dominant L. macrochirus was high amount of zooplankton, which includes copepoda and cladocera, while Cyprinidae species mainly consumed organic particles with zooplankton preys. Stable isotope analysis also suggested that L. macrochirus, Carassiusauratus, Pseudorasboraparva, and H. eigenmanni are major zooplantivorous group in the Jeondae Reservoir.
Keywords
eutrophication; fish; stomach contents; stable isotope; food web;
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