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박혜경 ( Hae Kyung Park ),이장호 ( Jangho Lee ),윤석환 ( Seuk Hwan Yun ),최명재 ( Myung Jae Choi ) 한국물환경학회 2013 한국물환경학회지 Vol.29 No.1
We compared the structure of fish community and condition of major fish species in Lake Chungpyung and Lake Paldang which are relatively shallow meso-eutrophic cascading dam reservoirs on the North Han River. Two lakes have wide littoral zone in the lakeside providing similarly good habitat for fishes whereas fishery and water recreational activities such as motorboating water skiing are allowed in Lake Chungpyung but are prohibited in Lake Paldang. The average lengths of large size fishes in Lake Chungpyung are shorter than those of same species in Lake Paldang resulting in the slight distortion of generation distribution of those species in Lake Chungpyung possibly owing to the active fishery such as fixed shore net fishing gill net fishing and angling. Meanwhile the condition of fishes represented by the length-weight relationship of fish species did not show the significant differences between two lakes and showed normal condition. To evaluate the impact of physical disturbance such as loud noise and turbulent wave from water recreational activities to fishes precisely further studies including physiological responses to stress an spawing activity should be needed.
최명재 ( Myung Jae Choi ),박혜경 ( Hae Kyung Park ),윤석환 ( Seuk Hwan Yun ),이장호 ( Jang Ho Lee ) 한국물환경학회 2012 한국물환경학회지 Vol.28 No.2
The fish community within the lake and 5 tributaries of Lake Chungju in spring and autumn, 2009 was surveyed. In this study, the total 128,506 individuals were collected belonging to 11 families 29 genera 34 species. The most dominant species was Squalidus japonicus coreanus that account for 91.6% of population and 49% of biomass of fish community. In the point of population, dominant species were small-sized species, which became the prey of big-sized predatory species. In the point of biomass, dominant species were predatory species which were large-sized. The most dominant species in lacustrine area was S. japonicus coreanus which accounted for 92.2% of total population and 49.1% of total biomass. The most dominant species of tributary streams was Tridentiger brevispinis which accounted for 66.4% of total population and 55.1% of total biomass. The site of C3 in lacustrine area and Dongdal-cheon in tributary streams collected the most number of species. Through ecological health evaluation of five tributary streams using 8 metric index of biological integrity (IBI) model, two streams (Dongdal-cheon, Kwang-cheon were evaluated as, B, good condition, and Jangsung-cheon obtained grade C indicating Fair condition, Jecheon-cheon obtained grade D indicating Poor condition based on IBI model. Lepomis macrochirus which was designated as a domestic ecosystem-disturbing alien species with wide food niche have shown tendency to increase the number of individuals since 1991 indicating the adverse effect on not only fish community but also aquatic ecosystem food web of Lake Chungju.