| Title |
Analysis of Physical Environmental Factors and the Structure of Fish Community in the Gapyeong Stream |
| Authors |
공동수 ( Dongsoo Kong ) ; 손세환 ( Se-hwan Son ) ; 김진영 ( Jin-young Kim ) ; 김아름 ( Ah Reum Kim ) ; 권용주 ( Yongju Kwon ) ; 김정우 ( Jungwoo Kim ) ; 김예지 ( Ye Ji Kim ) ; 민정기 ( Jeong Ki Min ) ; 김필재 ( Piljae Kim ) |
| DOI |
https://doi.org/10.15681/KSWE.2017.33.5.587 |
| Keywords |
Aquatic Habitat; Cluster Analysis; Fish Community; Gapyeong stream; Niche Overlap; Physical Environmental Factors |
| Abstract |
Physical environmental factors (water depth, current velocity and substrate) and fish community were surveyed in the Gapyeong stream, Korea. The fish group of Gapyeong Stream was divided into three types. Lithophilic fish, Koreocobitis rotundicaudata and Pseudopungtungia tenuicorpa preferred shallow depth, low-velocity current, and coarse bed condition, whereas Coreoleuciscus splendidus and Microphysogobio longidorsalis were adapted to high-velocity current and bed materials. Nektonic fish, Zacco koreanus and Zacco platypus appeared in a wide range of physical conditions. Intermediate fish, Hemibarbus longirostris, Pungtungia herzi and Coreoperca herzi adapted to moderate water depths and current velocities. Among them, H. longirostris and C. herzi were adapt to various bed materials. C. splendidus, M. longidorsalis and P. herzi showed high niche overlap for current velocity, water depth and substrate with Z. koreanus and Z. platypus. The occurrence of M. longidorsalis in a relatively low-velocity current compared to Z. koreanus and Z. platypus suggests that the current velocity act as a isolation factor for these species. The competition, isolation and character displacement among these species investigated detail in the future. Based on canonical correspondence analysis, the relative importance of each environmental factor was determined as substrate > water depth > current velocity. |