부영양 농업용저수지인 전대지의 어류군집 및 먹이망 특성
The Characteristics of Fish Community and Food Web in Eutrophic Agricultural Reservoir, Jeondae
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초록
Fish community was investigated in eutrophic Jeondae agricultural reservoir fromApril to November 2012. The food web structure of major fish species of Jeondae reservoir showedthat due to serious organic pollution, thehyper-eutrophic condition with high chemical oxygendemand (COD), chlorophyll-a (Chl-a), total nitrogen (TN) and total phosphorus (TP), as estimatedby stable isotope analysis. Total of 679 individuals were collected from the reservoir, and 9 specieswere identified. Interestingly, Lepomis macrochirus and Hemiculter eigenmanni known as less sensitiveto pollution and water quality deterioration, dominated the reservoir, and their relativeabundances were 38% and 27%, respectively. Further, the analysis of the stomach contents revealedthat main food source of dominant L. macrochirus was high amount of zooplankton, which includescopepoda and cladocera, while Cyprinidae species mainly consumed organic particles withzooplankton preys. Stable isotope analysis also suggested that L. macrochirus, Carassiusauratus,Pseudorasboraparva, and H. eigenmanni are major zooplantivorous group in the Jeondae Reservoir.
Abstract
Fish community was investigated in eutrophic Jeondae agricultural reservoir fromApril to November 2012. The food web structure of major fish species of Jeondae reservoir showedthat due to serious organic pollution, thehyper-eutrophic condition with high chemical oxygendemand (COD), chlorophyll-a (Chl-a), total nitrogen (TN) and total phosphorus (TP), as estimatedby stable isotope analysis. Total of 679 individuals were collected from the reservoir, and 9 specieswere identified. Interestingly, Lepomis macrochirus and Hemiculter eigenmanni known as less sensitiveto pollution and water quality deterioration, dominated the reservoir, and their relativeabundances were 38% and 27%, respectively. Further, the analysis of the stomach contents revealedthat main food source of dominant L. macrochirus was high amount of zooplankton, which includescopepoda and cladocera, while Cyprinidae species mainly consumed organic particles withzooplankton preys. Stable isotope analysis also suggested that L. macrochirus, Carassiusauratus,Pseudorasboraparva, and H. eigenmanni are major zooplantivorous group in the Jeondae Reservoir.
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