Korean Journal of Ichthyology (한국어류학회지)

The Ichthyological Society of Korea (한국어류학회)
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Has the Restoration Project of Pseudopungtungia tenuicorpa (Pisces: Cyprinidae) in the Jojongcheon Stream, Hangang River Failed?

조종천에 재도입된 멸종위기어류 가는돌고기 Pseudopungtungia tenuicorpa (Pisces: Cyprinidae) 복원사업은 정말 실패하였는가?

  • Received : 2020.09.02
  • Accepted : 2020.09.18
  • Published : 2020.09.30
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Abstract

The endangered Pseudopungtungia tenuicorpa were reintroduced to the Jojongcheon Stream in the Hangang River 2011~2012 as part of the restoration project. Since then, the restoration project has been evaluated as a failure because the P. tenuicorpa were not collected from the discharge site 2014~2016. This study was conducted 2017~2019 to verify that the P. tenuicorpa restoration project failed. Six locations were selected, including the discharge site, and the fish collection method used skimming nets, cast nets, long bag set nets, and scuba diving. In the survey results, 13 individuals were collected in a 0.5 km section, including the discharge station. The P. tenuicorpa habitat was approximately at a water depth of 0.5 m to 2 m in run water flow with the boulders and rocks. The age of the collected P. tenuicorpa were 0+ to 3-years-old, and the generation alternation was occurring stably. Thus, the P. tenuicorpa restoration project was evaluated as partially-successful, as the P. tenuicorpa, re-introduced to the Jojongcheon Stream, settled in its habitat with stable generation alternation.

멸종위기어류 가는돌고기 Pseudopungtungia tenuicorpa 복원사업의 일환으로, 2011~2012년 한강의 조종천에 가는돌고기가 방류되었다. 이후 2014부터 2016년까지 방류지에서 가는돌고기가 채집되지 않아 복원사업은 실패한 것으로 평가되었다. 본 연구는 가는돌고기 복원사업이 정말 실패하였는가를 검증하기 위해 2017년부터 2019년까지 정밀조사를 실시하였다. 조사지점은 방류지점을 포함하여 6개 지점을 선정하였으며, 족대와 투망, 일각망, 스쿠버다이빙 등을 이용하여 어류를 채집하였다. 조사결과 방류지점을 포함한 약 0.5 km 구간에서 13개체가 채집되었다. 가는돌고기 서식지역은 수심 0.5~2 m의 큰돌과 암반으로 이루어진 느린 여울부였다. 채집된 가는 돌고기의 연령은 당년생(0+)부터 3년생 이상으로 구성되어 있었으며, 지속적으로 세대교번이 일어나고 있었다. 따라서 조종천에 재도입된 가는돌고기는 비록 많은 개체가 서식하지 않았으나 서식지에 정착하여 지속적으로 세대교번을 하고 있어, 가는돌고기 복원사업은 부분성공으로 평가되었다.

Keywords

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