Korean Journal of Environment and Ecology (한국환경생태학회지)

Korean Society of Environment and Ecology (한국환경생태학회)
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Characteristic of Fish Community in the Stream Flowing into the Han River in Seoul, Korea

서울시 한강으로 유입되는 하천의 어류 군집 특성

  • Received : 2018.04.05
  • Accepted : 2018.05.20
  • Published : 2018.06.30
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Abstract

This study investigated the characteristics of fish communities in the streams flowing into the Han river in Seoul in May 2016 through April 2017. The investigated streams were Ui stream, Danghyeon stream, Cheonggye stream, Yangjae stream, Mokgam stream, Dorim stream, and Hongje stream, which were restored to their natural form. We collected 41 species of 10 families using skimming nets and cast nets from 21 points during the investigation period. There were 7 Korean endemic species, or 17.1% in collected species, such as Acheilognathus yamatsutae, Acheilognathus gracilis, Scrcocheilichthys nigripinnis morii, Squalidus japonicus coreanus, Zacco koreanus, Coreoperca herzi, and Odontobutis interruta. There were 5 (12.2%) exotic species: Cyprinus carpio (fancy type), Carassius auratus (goldfish), Carassius cuvieri, Lepomis macrochirus, and Micropterus salmoides. The dominant species were Zacco platypus, Carassius auratus, Acheilognathus lanceolatus, Acheilognathus gracilis, and Oryzias sinensis. The Yangjae stream showed more stable fish community than other streams as it showed higher species diversity, and evenness and richness indices. Regarding the fish tolerance guild according to water quality, there were 3 (7.3%) sensitive species, 16 (39.0%) intermediate species, and 22 (56.7%) tolerant species. Twelve (29.3%) were insectivore species, 23 (56.1%) were omnivore species, and 6 (14.6%) were carnivore species, indicating the dominating presence of omnivore fish species.

서울시 한강으로 유입되는 하천의 어류군집 특성 분석을 위해 2016년 5월부터 2017년 4월까지 조사하였다. 자연형으로 복원된 하천은 우이천, 당현천, 청계천, 양재천, 목감천, 도림천, 홍제천 등이다. 조사 기간 동안 21개 지점에서 족대와 투망으로 채집된 어류는 총 10과 41종이었다. 한반도 고유종에 속하는 어종은 줄납자루(Acheilognathus yamatsutae), 가시납지리(Acheilognathus gracilis), 중고기(Scrcocheilichthys nigripinnis morii), 몰개(Squalidus japonicus coreanus), 참갈겨니(Zacco koreanus), 꺽지(Coreoperca herzi), 얼룩동사리(Odontobutis interruta) 등 7종이었으며 고유화빈도가 17.1%이었다. 국외에서 도입된 외래종은 비단잉어(Cyprinus carpio, Fancy type), 금붕어(Carassius auratus, Gold fishh), 떡붕어(Carassius cuvieri), 블루길(Lepomis macrochirus), 배스(Micropterus salmoides) 등 5종(12.2%)이었다. 각 조사 지점별 우점종은 피라미(Zacco platypus), 붕어(Carassius auratus), 납자루(Acheilognathus lanceolatus), 가시납지리(Acheilognathus gracilis), 대륙송사리(Oryzias sinensis) 등이었다. 종다양도지수, 균등도지수 및 종풍부도 지수에서 양제천이 다른 조사 하천에 비해 지수가 높아 안정적인 군집 상태를 나타내었다. 수질에 대한 내성도 guild에서 민감종이 3종(7.3%), 중간종 16종(39.0%), 내성종 22종(53.7%)이었다. 식성에서 충식성은 12종(29.3%), 잡식성 23종(56.1%), 육식성 6종(14.6%)으로 잡식성이 매우 풍부하였다.

Keywords

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