Korean Journal of Environment and Ecology (한국환경생태학회지)

Korean Society of Environment and Ecology (한국환경생태학회)
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The Fish Fauna Changes and Characteristics Populations of Zacco koreanus in Cheonggye Stream after the Rehabilitation, Korea

청계천 복원 후 어류상 변화와 참갈겨니 Zacco koreanus의 개체군 특성

  • Received : 2013.09.12
  • Accepted : 2013.12.06
  • Published : 2013.12.31
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Abstract

The fish fauna and population Zacco koreanus in the Cheonggye stream after the rehabilitation was investigation from April 2011 to May 2012. The collected species during the survey period were 24 species belonging to three families. Among them, Korean endemic species such as Rhodeus uyekii, Acheilognathus yamatsutae, Acheilognathus gracilis, Squalidus japonicus coreanus and Zacco koreanus were observed in the stations. Dominant species was Zacco platypus (St. 1, 3, 4) and Z. koreanus (St. 2). A total of species of A. gracilis, Hemibarbus longirostris, Gnathopogon strigatus, S. japonicus coreanus, Pseudogobio esocinus, Erythroculter erythropterus, and Tridentiger brevispinis were first observed this study with compared the previous data (2005, 2008). It seems that the introduction species of artificially to the Cheonggye stream were Cyprinus carpio (fancy carp), Carassius auratus (gold fish), Carassius auratus (chinese carp), Zacco temmincki, Z. koreanus and Misgurnus mizolepis. Calculation of the length-weight relationship of Z. koreanus showed the value of constant a as 0.000007 and b as 3.58, and condition factor (K) was 0.82 on average. The frequency analysis of total length indicated that the group 20~80mm in total length is represented by one year-old individuals, the group 90~120mm by two year-old individuals, and the group over 130mm by three year-old individuals. It is assessed that stable spawning occurred following the introduction to the Cheonggye stream.

2011년 4월부터 2012년 5월까지 복원된 청계천 수역에서 어류상과 참갈겨니(Zacco koreanus) 개체군을 조사하였다. 출현한 어종은 총 3과 24종이었고 고유종은 각시붕어(Rhodeus uyekii), 줄납자루(Acheilognathus yamatsutae), 가시납지리(Acheilognathus gracilis), 몰개(Squalidus japonicus coreanus), 참갈겨니(Zacco koreanus) 등 이었다. 각 조사지점에서 우점종은 피라미(Zacco platypus, St. 1, 3, 4)와 참갈겨니(St. 2) 이었다. 2008년 이전 조사와 비교 시 본 조사에서 새로 출현한 어종은 각시붕어, 가시납리리, 참마자(Hemibarbus longirostris), 줄몰개(Gnathopogon strigatus), 몰개, 모래무지(Pseudogobio esocinus), 강준치(Erythroculter erythropterus), 민물검정망둑(Tridentiger brevispinis) 등 이었다. 인위적인 방류로 도입된 종은 비단잉어(Cyprinus carpio), 중국붕어(Carassius auratus,), 금붕어(Carassius auratus), 갈겨니(Zacco temmincki), 참갈겨니, 미꾸라지(Misgurnus mizolepis) 등으로 추정된다. 참갈겨니 전장과 체중의 관계식 회귀계수 값은 $3.58(BW=0.000007T{_L}^{3.58})$이었고 비만도 (K)는 평균 0.82이었다. 전장이 20~80mm는 만 1년생, 90~120mm는 만 2년생, 130mm 이상은 만 3년생 이상으로 추정되었다. 참갈겨니는 청계천에서 도입된 이후 안정적으로 산란이 이루어지고 있는 것으로 추정되었다.

Keywords

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