ORIGINAL RESEARCH
Fish Community Dynamics in the Artificial Fishways of Three Different Watersheds, and Fish Passage Evaluations Using a Multi-Metric Fishway Model
Young-Ju Lee 1  
,  
Sang-Jae Lee 2  
,  
Dae-Yul Bae 1  
,  
Kwang-Guk An 1  
 
 
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1
Department of Bioscience and Biotechnology, Chungnam National University, Daejeon 34134, South Korea
2
Chemical Safety Division, Saemangeum Regional Environmental Office, Jeonju 54872, South Korea
CORRESPONDING AUTHOR
Kwang-Guk An   

Department of Bioscience and Biotechnology, Chungnam National University, Daejeon-34134, Department of Bioscience and Biotechnology, Chungnam National University, Daejeon-34134, 34134 Daejeon, Korea (South)
Online publish date: 2019-03-14
Submission date: 2018-04-13
Final revision date: 2018-08-01
Acceptance date: 2018-08-11
 
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ABSTRACT
We analyzed fish community dynamics in fishways in the Yeongsan, Nakdong, and Geum river watersheds in South Korea and evaluated fish passage efficiency using a multimetric fishway assessment model, along with analyses of water chemistry and flow regime, from April to October 2016. The dominant fish in the fishways was Erythroculter erythropterus, with a mean relative abundance of 28.5% in all three watersheds. Omnivorous species and tolerant species were the dominant fish guilds in the fishway communities. The highest frequency of fish passage through the fishways occurred during the spawning season from April to June. During the summer monsoon, flow velocity increased rapidly and juvenile and young fish rarely passed through the fishways, which demonstrates that fish passage decreased significantly with increased current velocity (R2 = 0.463, P<0.05). The ecological health, based on the fish health model, and the trophic state, based on the nutrient regime, were evaluated in the three watersheds. Overall, the multimetric model of fish passage efficiency, based on structural, hydrological, and biological metrics, showed that the Yeongsan fishway was the most suitable while the other two fishways were unsuitable.
eISSN:2083-5906
ISSN:1230-1485