Korean Journal of Ichthyology (한국어류학회지)

The Ichthyological Society of Korea (한국어류학회)
권호 표지

Distribution Aspect and Extinction Threat Evaluation of the Endangered Species, Rhodeus pseudosericeus (Pisces: Cyprinidae) in Korea

멸종위기어류 한강납줄개 Rhodeus pseudosericeus (Pisces: Cyprinidae)의 분포양상 및 멸종위협 평가

  • 고명훈 (이화여자대학교 에코과학부) ;
  • 한미숙 (이화여자대학교 에코과학부) ;
  • 권선만 (국립생물자원관)
  • Received : 2018.03.13
  • Accepted : 2018.06.07
  • Published : 2018.06.30
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Abstract

The distribution aspect and extinction threat evaluation of the endangered species, Rhodeus pseudosericeus were investigated from 2012 to 2017 in Korea for the subject of this study. The number of appearance sites in the past literature of available and identified R. pseudosericeus was 26. During the study period, the samples of R. pseudosericeus were collected in 44 sites (Hangang River 35 sites, Sapgyocheon Stream 4 sites, Daecheoncheon Stream 5 sites) among the noted 214 sampling stations investigated. Among these, the newly appearance streams were Ilricheon Stream, Samsancheon Stream, Bangyecheon Stream and Hanpocheon Stream in the Hangang River. In addition, the habitats and populations in the upper Seomgang River (Hoengseong Dam), lower Heukcheon Stream, Muhancheon Stream and Daecheoncheon Stream decreased due to dam construction, river work, water pollution, and the spread of the exotic species Micropterus salmoides. The main habitat of R. pseudosericeus was the middle-upper stream of clean water with slow water velocity, sand-pebble bottoms and lots of aquatic plants. Given this evidence as noted for the 30.2% reduction in occupancy within 10 years, due to the qualitative decline of habitat, the overfishing risk of ornamental fish and the spread of M. salmoides, in this case R. pseudosericeus is considered to be Vulnerable (VU A2cde) based on the IUCN Red List categories and criteria.

우리나라 멸종위기어류 한강납줄개 R. pseudosericeus의 분포양상 및 멸종위협 등급을 평가하기 위해 과거 문헌 기록을 정리하고 2012년부터 2017년까지 분포조사를 실시하였다. 과거에 출현한 지점 수는 26개였으며, 분포조사는 214지점을 조사하여 44개 지점(한강 35개, 삽교천 4개, 대천천 5개 지점)에서 서식을 확인하였다. 한강의 일리천과 삼산천, 반계천, 한포천은 처음으로 서식이 확인되었으나 섬강의 횡성댐 일대와 흑천 하류, 무한천, 대천천 등은 댐건설과 하천공사, 수질오염, 외래종 배스의 확산 등으로 심각한 서식지 및 개체수가 심각하게 감소하고 있었다. 한강납줄개의 주요 서식지는 물이 맑은 하천 중 상류 정수역의 모래와 자갈의 비율이 높고 수생식물이 많은 곳이었다. IUCN 적색목록 기준지침서에 따라 멸종위협 등급을 평가하면, 10년 이내 점유면적 30.2%의 감소와 서식지의 질적 하락, 관상용으로 남획 위험, 외래종 배스의 확산 등으로 멸종위기 등급인 취약(VU A2cde)으로 평가되었다.

Keywords

References

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