Korean Journal of Ichthyology (한국어류학회지)

The Ichthyological Society of Korea (한국어류학회)
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Characteristic of Fish Community and Distribution of Exotic Species at the Hangang River in Seoul, Korea

서울시 한강의 어류군집과 외래종 분포 특성

  • Received : 2018.08.10
  • Accepted : 2018.09.04
  • Published : 2018.09.30
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Abstract

This study investigated the characteristics of fish communities at the Hangang River in Seoul from Jun 2016 to March 2017. During the survey period, there were 56 species of 17 families collected from 5 survey stations. The species that appeared mainly in the brackish water was Coilia nasus, Leiocassis nitidus, Lateolabrax maculata, Repomucenus olidus, Trachidermus fasciatus, Mugil cephalus, Chelon haematocheilus, Synechogobius hastus, Tridentiger bifasciatus and Takifugu obscurus. The migration fish of Anguilla japonica, C. nasus, Plecoglossus altivelis, Hypomesus nipponensis and T. obscurus appeared in this surveyed area. Korean endemic species were 11 species (17.9%) and accounted for a low rate. There were 6 species (10.7%) exotic species including Cyprinus carpio, Carassius cuvieri, Hypophthalmichthys molitrix, Megalobrama amblycephala, Lepomis macrochirus and Micropterus salmoides. The dominant species by stations were Acheilognathus gracilis (St. 1) and Hemibarbus labeo (St. 2, 3, 4, 5). Regarding the tolerance guild according to water quality, there were 3 (7.1%) sensitive species, 24 (42.9%) intermediate species, and 28 (50.0%) tolerance species. Twenty (35.7%) were insectivore species, 18 (32.1%) were omnivore species, 14 (25.0%) were carnivore species, and 4 (7.1%) were herbivore species, indicating the dominating presence of insectivore and omnivore fish species.

서울시 한강 어류군집 특성 분석을 위해 2016년 6월부터 2017년 3월까지 조사하였다. 조사기간 동안 5개 조사지점에서 출현한 어종은 총 17과 56종이었다. 기수역에 주로 서식하는 웅어 (Coilia nasus), 밀자개 (Leiocassis nitidus), 점농어 (Lateolabrax maculata), 강주걱양태(Repomucenus olidus), 꺽정이 (Trachidermus fasciatus), 숭어 (Mugil cephalus), 가숭어 (Chelon haematocheilus), 풀망둑 (Synechogobius hastus), 민물두줄망둑 (Tridentiger bifasciatus), 황복 (Takifugu obscurus) 등이 출현하였다. 회유성 어종인 뱀장어 (Anguilla japonica), 웅어, 은어(Plecoglossus altivelis), 빙어(Hypomesus nipponensis), 황복 등이 출현하였다. 한반도 고유종은 11종 (17.9%)로 매우 낮은 비율을 차지하였다. 국외에서 도입된 어종은 유럽잉어 (Cyprinus carpio nudus), 떡붕어 (Carassius cuvieri), 백련어 (Hypophthalmichthys molitrix), 단두어 (Megalobrama amblycephala), 블루길(Lepomis macrochirus), 배스 (Micropterus salmoides) 등 6종 (10.7%)이었다. 각 조사지점별 우점종은 가시납지리 (Acheilognathus gracilis, St. 1)와 누치 (Hemibarbus labeo, St. 2, 3, 4, 5)이었다. 수질 내성도 guild에서 민감종의 상대풍부도는 3종 (7.1%), 중간종은 24종 (42.9%), 내성종은 28종 (50.0%)로 내성종이 매우 높았다. 섭식특성 gulid에서 충식성은 20종 (35.7%), 잡식성 18종 (32.1%), 육식성 14종(25.0%), 초식성 4종(7.1%)으로 충식성과 잡식성 어종이 매우 풍부하였다.

Keywords

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