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Estimation of Fish Fauna and Habitat Suitability Index in the Geum River Basin  

Hur, Jun-Wook (River Environment Team, Water Resources and Environmental Research Center, K-water Research Institute, Korea Water Resources Corporation)
Park, Jin-Woo (River Environment Team, Water Resources and Environmental Research Center, K-water Research Institute, Korea Water Resources Corporation)
Kang, Shin-Uk (River Environment Team, Water Resources and Environmental Research Center, K-water Research Institute, Korea Water Resources Corporation)
Kim, Jeong-Kon (River Environment Team, Water Resources and Environmental Research Center, K-water Research Institute, Korea Water Resources Corporation)
Publication Information
Korean Journal of Environment and Ecology / v.23, no.6, 2009 , pp. 516-527 More about this Journal
Abstract
We assessed fish fauna and habitat suitability indexes in the Geum river basin. Field monitoring was conducted for ecological and habitat condition assessment at 23 sites from October 2007 to March 2009. The habitat suitability indexes established for dominant fish species using the monitoring data were employed to assess riverine health conditions such as composition ratio of fish species, richness and dominance indexes, bio-diversity(dominance index, diversity, evenness and richness), and water depth, velocity and substrate size. Twenty-one species(42%) including Rhodeus uyekii and Pseudopungtungia nigra were found endemic out of the 50 species in 11 families sampled during this study period. The most frequently found one was Zacco platypus(34.3%) followed by Z. koreanus(10.2%) and Coreoleuciscus splendidus(8.4%). For Z. platypus, the dominant fish species in the basin, the favored habitat conditions were estimated to be 0.1~0.9 m for water depth, 0~0.9m/s for flow velocity and silt(<0.1mm)~cobbles(100.0~300.0mm) for substrate size, respectively. Overall, it was concluded that the Geum river basin has been relatively well protected from the anthropogenic disturbance for the legally protected species including the endemic species studied in this study.
Keywords
FISH FAUNA; WATER DEPTH; VELOCITY; SUBSTRATE SIZE; RIVERINE HEALTH CONDITION;
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