生態系의 構造와 機能을 밝히고 自然 資源의 保護 對策을 세우기 위하여 桂芳山 溪流의 8個 調査 地所에서 1993年 5月 10日부터 8月 20日까지의 期間에 淡水魚類相을 調査했으며 그 結果는 다음과 같다. 1. 總 8個 調査 地所는 모두 Aa型인 山間 溪流型이었고 大部分의 調査 地所에서 물이 맑고 水溫이 낮은 便이었다. 2. 總 19種의 淡水魚類를 確認했으며 이 中에서 一次 淡水魚는 15種(78.9%), 周緣注淡水魚는 4種(21.1%)이었고 韓半島 固有種은 금강모치, 쉬리, 가는돌고기, 배가사리, 새코미꾸리, 참종개, 미유기, 퉁가리, 꺽지 等의 9種(47.4%)이었다. 3. 桂芳山 溪流에 있어서 特徵的인 魚種은 열목어, 금강모치, 미유기, 둑중개 等의 4種이다. 4. 무지개송어는 導入 魚種으로 强한 肉食性을 지니고 있으므로 이곳 魚類相에 影響이 클 것으로 생각된다. 5. 열목어, 금강모치, 새미, 가는돌고기, 둑중개 等의 5種 특히 保護를 要한다고 생각된다. 6. 무지개송어 Salmo gairdneri와 버들치 Moroco oxysephalus가 桂芳山 溪流에 棲息하고 있음이 本 調査에서 처음으로 確認되었다.

To clarify the structures and functions of ecosystem and to establish the methods of conservations of natural resource of the Mt. Kyebang area, the author surveyed the aquatic environments and freshwater fish fauna at 8 stations from May 10 to Aug. 20, 1993. The results are as follows; 1. It was confirmed that all of the surveyed stations are mountain valley of rive types of Aa and showed considerably clear water quality and low water temperatures. 2. It was confirmed that 19 species of freshwater fishes from each surveyed stations and 15 species of primary freshwater fishes (78.9%) and 4 species of pheripheral freshwater fishes (21.1%) of the confirmed 19 species. 3. Nine out of 19 species of freshwater fishes (47.4%) are known as Korean endemic species. They are Moroco sp., Coreolewsicsus splendidus, Pseudopungtungia tenuicorpus, Microphysogobio longidorsalis, Cobitis rotundicaudatus, Cobitis koreensis koreensis, Silurus microdorsalis, Liobagrus andersoni and Coreoperca herzi. 4. The four species of Brachymystax lenok, Moroco sp., Silurus microdorsalis and Coitus poecilopterus are characteristic species of the Streams of Mt. Kyebang. 5. Rainbow trout (Salmo gairdneri) of an introduced hardly canivorous fish will strongly influence the fish fauna of the Streams of Mt. Kyebang. 6. The five species of Brachymystax lenok, Moroco sp., Ladislavia taczanowski, Pseudopungtungia tenuicorpus and Coitus poecilopterus are needs particular conservation for their survivals. 7. Salmo gaidneri and Moroco oxycephalus are first record at Streams of Mt. Kyebang in this study.