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멸종위기어류 열목어 Brachymystax lenok tsinlingensis (Pisces: Salmonidae)의 분포현황과 서식지 특징, 멸종위협 평가
Distribution Status, Habitat Characteristics and Extinction Threat Evaluation of the Endangered Species, Brachymystax lenok tsinlingensis (Pisces: Salmonidae) 원문보기

Korean journal of Ichthyology = 한국어류학회지, v.33 no.2, 2021년, pp.74 - 83  

고명훈 (고수생태연구소) ,  최광식 (고수생태연구소) ,  한미숙 (고수생태연구소)

초록
AI-Helper 아이콘AI-Helper

우리나라의 멸종위기어류 열목어 Brachymystax lenok tsinlingensis의 분포양상 및 서식지 특징, 멸종위협 등급을 평가하기 위해 분포조사를 2015년과 2019년에 실시하였다. 출현기록은 1990년 이전, 1997~2006년, 2000~2011년, 2010~2019년으로 나누어 정리하였다. 분포조사는 모두 150개 지점을 조사하여 67개 지점에서 542개체를 확인하였는데, 내린천 (11개 지점), 오대천(11개), 북천(10개), 방태천(8개), 송정리천(4개), 수입천(3개), 인북천(3개), 현동천(3개) 등의 순으로 지점수와 개체수가 많았다. 열목어의 주 서식지는 고도가 400 m 이상으로 높은 하천 상류로 유폭 4~20 m, 수심 1~2 m이며 큰돌의 비율이 70~80%로 높은 곳이었다. 감소 및 위협요인은 하천정비공사, 저수지 및 교량 건설, 오염수 배출, 여름철 피서객 유입, 보 등이었다. 멸종위협 등급을 IUCN 평가기준(A, B)에 따라 평가했을 때, 2000~2011년 대비 서식지 감소율(20.7%), 출현범위 (7,732 km2), 점유면적 (268 km2), 단절된 지소수 (15개), 서식지 질 하락 등을 근거로 근접한 취약(Near meets VU A2acd, B1b (i,ii,iii)+B2b (i,ii,iii))으로 나타나 최종 "준위협종(Near Threatened, NT)"으로 평가되었다.

Abstract ▼ AI-Helper 아이콘AI-Helper

Distribution status, habitat characteristics, and extinction threat evaluation of the endangered species, Brachymystax lenok tsinlingensis were investigated in 2015 and 2019. Historical distribution reports of B. l. tsinlingensis were divided into before 1990, 1997~2006, 2000~2011, and 2010~2019. Am...

주제어

#Brachymystax lenok tsinlingensis   #endangered species   #distribution aspect   #extinction threat evaluation  

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