한국어류학회지 (Korean Journal of Ichthyology)

  • 제31권1호
  • /
  • Pages.16-22
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  • 2019
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  • 1225-8598(pISSN)
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  • 2288-3371(eISSN)
한국어류학회 (The Ichthyological Society of Korea)
권호 표지

한국고유종 북방종개 Iksookimia pacifica (Pisces: Cobitidae)의 분포양상과 멸종위협 평가

Distribution Aspects and Extinction Threat Evaluation of the Korean Endemic Species, Iksookimia pacifica (Pisces: Cobitidae) in Korea

  • 투고 : 2019.02.25
  • 심사 : 2019.03.21
  • 발행 : 2019.03.31
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초록

우리나라 고유종 북방종개 Iksookimia pacifica의 분포양상 및 멸종위협을 평가하기 위하여 처음으로 정밀분포조사를 2017년부터 2018년까지 실시하였다. 북방종개는 조사기간 중 33개 하천, 104개 지점을 조사하여 17개 하천, 46개 지점 (고성군 배봉천~강릉시 군선천)에서 서식을 확인하였다. 서식개체수는 비교적 북천과 배봉천, 화상천, 천진천, 오호천 등에서 비교적 많았으나 사천천과 남천, 강릉남대천 등에서는 적었다. 서식지는 대부분 하천 중 하류의 물이 맑고 유속이 느리며 하상은 모래가 쌓인 소(pool)였으며, 위혐요인은 하천공사와 수질오염으로 추정되었다. 본 결과를 과거 출현기록과 비교하면, 처음으로 삼포천에서 서식을 확인하였으나 주수천과 전천, 삼척 오십천에서는 서식이 확인되지 않았다. 북방종개의 멸종위협을 평가했을 때 서식지가 3세대 동안 19.5%가 감소하고 작은 출현면적 ($1,343km^2$)과 점유면적 ($184km^2$)을 보였지만, 지소수가 많고(18개) 서식범위 내에서 비교적 넓게 퍼져 있으며 개체수도 비교적 많기 때문에 멸종위협 등급은 준위협(NT)으로 평가되었다.

Investigations on the study of the distribution aspects and extinction threat evaluation of the Korean endemic species, Iksookimia pacifica were done from 2017 to 2018 in Korea. During the study period, the samples of I. pacifica were collected in 17 streams, 46 sites (from Baebongcheon Stream of Goseong-gun to Gunsuncheon Stream of Gangneung-si) among the noted 33 streams and 104 sampling sites investigated. The population size of I. pacifica was relatively large in streams such as Bukcheon, Baebongcheon, Hwasangcheon, Cheonjincheon, Ohhocheon Stream etc., but the population size was small in streams such as Sacheoncheon, Namcheon, Gangneung Namdaecheon Stream etc. The main habitat of I. pacifica was the downstream pool of clean water with slow velocity and sand bottoms, and their sensibility was estimated to be due to river work and water pollution. Comparing the previous records of the appearance of I. pacifica, they were first seen in Sampocheon Stream, but they did not appear in Jusucheon, Jeoncheon, Samcheok Osipcheon Stream. Given this evidence as noted for the 19.5% reduction in occupancy within 3 generations, in small appearance range ($1,343km^2$) and small occupancy area ($184km^2$), the number of locations were many (18) and the population was relatively large within the range of habitat. Therefore, I. pacifica is now considered a Near Threatened (NT) based on the IUCN Red List categories and criteria.

키워드

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