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성치남,백근식,최지혁,조현욱,김종홍 ( Chi Nam Seong,Keum Sik Baik,Ji Hyeok Choi,Hyun Wook Cho,Jong Hong Kim ) 한국하천호수학회 1997 생태와 환경 Vol.30 No.2
Water quality and fish community in the streamlets of Juam reservoir were investigated in March, July, October and December 1997. Average value of dissolved oxygen, chemical oxygen demand and suspended solids was 10.1, 3.9 and 5.7 mg/l, respectively. Concentration of ammonium nitrngen varied with sites. Content of ammonium nitrogen, total nitrogen and phosphate-phosphorous of Site 4 where the waste water from Posung-up flows, was higher than that of any other sites. The number of collected fish species was 46 in 33 genera which belong to 12 families. Sixteen species in 13 genera were identified as Korean endemic species. Dominant species, Zacco platypus was collected in all sites. The largest number of species were collected in Site 10. Carassius auratus, Pseudorasbora parva and Z. platypus which have strong adaptablity to the environmental changes were collected in Site 4 where the species composition was simpler and the water was more polluted. Diversity and evenness indices ranged from 0.60 to 1.18 and from 0.28 to 0.75, respectively. These indices were low in the polluted sites. These results showed that water quality is related to some extent with species composition of fish.