Korean Journal of Ecology and Environment (생태와환경)

The Korean Society of Limnology (한국수생태학회)
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Evaluation of Movement Pattern of Erythroculter erythropterus Inhabit in the Mid-lower Part of Nakdong River Using Acoustic Telemetry

낙동강 중.하류 구간에서 수중 음향측정방식을 이용한 강준치의 이동성 평가

  • Yoon, Ju-Duk (Biological Resource Center, Kongju National University) ;
  • Kim, Jeong-Hui (Department of Biology Education, Kongju National University) ;
  • In, Dong-Su (Biological Resource Center, Kongju National University) ;
  • Yu, Jae Jeong (Nakdong River Environment Research Center, National Institute of Environmental Research) ;
  • Hur, Moonsuk (Nakdong River Environment Research Center, National Institute of Environmental Research) ;
  • Chang, Kwang-Hyeon (Department of Environmental Science and Engineering, Kyung Hee University) ;
  • Jang, Min-Ho (Department of Biology Education, Kongju National University)
  • 윤주덕 (공주대학교 생물자원센타) ;
  • 김정희 (공주대학교 생물교육과) ;
  • 인동수 (공주대학교 생물자원센타) ;
  • 유재정 (국립환경과학원 낙동강물환경연구소) ;
  • 허문석 (국립환경과학원 낙동강물환경연구소) ;
  • 장광현 (경희대학교 환경학 및 환경공학과) ;
  • 장민호 (공주대학교 생물교육과)
  • Received : 2012.09.20
  • Accepted : 2012.11.14
  • Published : 2012.12.31
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Abstract

Acoustic telemetry is used to obtain a relatively continuous record of fish movement. This method has several advantages for studying migrating fish populations that are moving from large rivers. The Nakdong River is the longest river in South Korea and the main stream has faced a change, which consists of the installation of the large weirs. In this study, we applied acoustic telemetry to monitor the movement pattern of Erythroculter erythropterus (family Cyprinidae) and identified home range and movement distance in the Nakdong River. A total of fourteen individuals were released at three different locations and around 80 km section from the estuary barrage was investigated. Eight individuals were tagged and released at estuary barrage (N02) utilized up to 15.9 km (home range) upstream from the release site as home range. Four individuals were tagged and released at Samrangjin (N07), most fish moved and stayed within 9.7 km (home range) downstream area, except E12, which did not show any movement. Two individuals were tagged and released at Changnyeong-Haman weir (N10), and all individuals migrated downstream from the release site. Especially, E14 recorded the longest accumulated detected distance, 36.7 km downstream during 32 days after release. There was no correlation identified between movement (accumulated detected distance and home range) and standard length (Spearman rank correlation, p>0.05). Although, this technique could be an available method to monitor behavior and ecology of freshwater fish effectively, increment of number of receivers and tags are required for more detailed results of fish migration.

수중음향측정 방식은 어류이동에 대한 연속적인 자료를 확보하기 위해 사용되는 방식으로, 대형하천이나 하구에서 이동하는 어류의 이동에 용이하게 활용된다. 낙동강은 남한에서 가장 긴 하천으로 연속적인 보의 설치로 인하여 하천의 변형이 이루어지고 있다. 본 연구에서는 국내에 서식하는 잉어과 어류인 강준치를 대상으로 하여 수중음향측정방식을 적용, 서식처범위(home range)와 이동거리, 이동패턴에 대한 모니터링을 시행하였다. 연구는 낙동강 하구둑부터 창녕함안보까지의 약 80 km 구간을 대상으로 총 14개체의 강준치를 3지점에 방류하여 모니터링을 수행하였다. 하구둑(N02)에서 방류한 8개체들은 방류지점으로부터 15.9 km 상류지점까지를 서식처 범위로 하여 이동하였고, 삼랑진(N07)에서 방류한 4개체들은 신호가 사라진 E12개체를 제외하고 하류로 이동하였으며, 9.7 km 구간을 서식처 범위로 활용하였다. 2개체가 방류된 창녕함안보(N10)에는 모두가 하류로 이동 하였으며, 이 중 E14개체는 32일 동안 가장 긴 누적감지거리(36.7 km)를 이동하였다. 강준치의 체장과 누적감지거리, 서식처 범위와는 상관성이 없는 것으로 확인되었다(Spearman rank correlation, p>0.05). 비록 본 연구 방식이 담수어류의 이동에 유용하지만 좀 더 자세한 결과를 확보하기 위해서는 수신기의 수와 적용하는 발신기의 수를 증가시킬 필요성이 있다.

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