한국환경생태학회지 (Korean Journal of Environment and Ecology)

  • 제30권4호
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  • Pages.745-750
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  • 2016
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  • 1229-3857(pISSN)
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  • 2288-131X(eISSN)
한국환경생태학회 (Korean Society of Environment and Ecology)
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태화강에서 처음 채집된 금강모치(Rhynchocypris kumgangensis)

The First Record on the Rhynchocypris kumgangensis from Taehwa River, Korea

  • 투고 : 2016.05.24
  • 심사 : 2016.07.21
  • 발행 : 2016.08.30
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초록

태화강에 분포하는 금강모치의 형태적 특징과 개체군 특징 조사를 2014년 4월부터 2015년 4월까지 실시하였다. 태화강 상류역인 국수천(울산광역시 울주군 범서읍 망성리)이 금강모치(Rhynchocypris kumgangensis) 새로운 서식지로 확인이 되었으며 또한 강릉남대천 이남의 동해남부로 유입되는 하천에서도 처음 발견되었다. 태화강에 서식하는 개체군은 한강 개체군에 비해 미병장(CPL)이 미병고(CPD)에 비해 짧았으며 그 외의 형질은 거의 일치하였다. 계수형질에 있어 태화강 개체군은 측선비늘수, 측선상부비늘수, 측선하부비늘수 등이 다소 적었고 그 외의 형질은 일치하였다. 전장빈도분포도는 45~65mm 이었고 평균 전장은 54.2mm 이었다. 공서어종 중 피라미(Zacco platypus) 25.2%, 버들치(Rhynchocypris oxycephalus) 24.1%) 참갈겨니(Zacco koreanus) 21.8% 등의 개체수 구성비가 높았다. 전장빈도 분포도는 45~65mm 이었고 평균 전장은 54.2mm 이었다. 전장과 체중의 관계식은 $BW=0.000002TL^{3.44}$로 상수 a는 0.000002을, 매개변수 b는 3.44 이었고 건강도는 평균 1.10 이었다.

Morphological characteristics and population characteristics of the Rhynchocypris kumgangensis were investigated at Taehwa River from April 2014 to April 2015. This is the first record on R. kumgangensis not only from Guksu stream (the upstream region of Taehwa River, Ulsan-si Ulchu-gun Beomseo-eup Kuksu-ri) but also from the stream flowing into the Gangneungnamdae stream, in the southern part of East Sea, Korea. The morphometric characteristics of R. kumgangensis in the Taehwa River and the Han River are very similar except that the population at Taehwa River showed shorter caudal peduncle length than caudal peduncle depth when compared with the population at Han River. In terms of meristic character the population at Taehwa River showed fewer numbers of scales at the lateral line, above the lateral line and below the lateral line. Other than that, the two populations showed the same meristic characters. The fish cohabiting with R. kumgangensis mainly composed of Zacco platypus (25.2%), Rhynchocypris oxycephalus (24.1%) and Zacco koreanus (21.8%). Length frequency distribution analysis indicated that the length of the group ranged between 45~65 mm and the average length was 54.3 mm. Calculation of the length-weight relation of R. kumgangensis showed the value of constant a as 0.000002 and b as 3.34, and the Condition factor (K) was 1.10 an on average.

키워드

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