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나주호의 (羅州湖) 요각류에 (橈脚類) 대한 생태학적 연구
정정의,유형빈,김석이,이관식 ( Chung Eui Chung,Hyung Bin Yoo,Seok Yee Kim,Kwan Sik Lee ) 한국하천호수학회 1992 생태와 환경 Vol.25 No.2
In order to clarify the ecological characteristics of Freshwater Copepoda, this study was carried out by monthly during the period from June, 1990 to May, 1991 at six selected stations in Lake Naju, Korea. Throughout the investigation period, total 5 genera and 6 species of the free-living Copepods were identified: Paracyclops fimbriatus, Cyclops vicinus, Mesocyclops leuckarti, Thermocyclops tailhokuensis, T. hyalinus, Canthocamptus carinatus as well as Nauplius of Copepoda. Monthly distribution of copepoda appeared as follows: Paracyyclops fimbriatus distributed in June only; Cyclops vicinus from December to June; Mesocyclops leuckarti from June to January; Thermocyclops taihokuensis from April to January; T. hyalinus from March to January; Canthocamptus carinatus June, October, December, March and April on the bottom, and Nauplius of Copepoda occurred during the period of this study continuously. On the monthly number of species, 7 species occurred in June; 5 species in March, July, October and December; 4 species in January, April, May, August, September and November; 2 species in February. Total biomass of Copepoda ranged from 2,040 (Station 6, May) to 305,891 indiv./L(Station 3, September). Also, biomass of species ranged from 582 to 74, 934 indiv./L. Dominant species were 4 species. thermocyclops taihokuensis, T. hyalinus in Summer and Autumn; Cyclops vicinus and Thermocyclops taihokuensis in Spring; Cyclops vicinus in Winter. While, Nauplius of Copepoda appeared dominant species during the investigation peirod, continuously Dominance index (DI) ranged from 0.56 (June at middle) to 1.00 (November and January at surface; February at surface, middle and bottom; March at middle). Species diversity index (H) ranged from 0.318 (March at surface) to 2.271 (June at middle) and appeared middle, bottom and surface in order. Generally, the dynamics of Copepoda was closely related to the environmental factors (temperature, dissolved oxygen, pH, transperency and ChloropyII a).
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