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Study on Habitat Selection of Odontobutis interrupta using PIT Telemetry

PIT telemetry를 이용한 얼록동사리의 서식지 선택 연구

  • Jun-Wan Kim (Department of Biology Education, Kongju National University) ;
  • Kyu-Jin Kim (Department of Biology Education, Kongju National University) ;
  • Beom-Myeong Choi (Department of Biology Education, Kongju National University) ;
  • Ju-Duk Yoon (Research Center for Endangered Species, National Institute of Ecology) ;
  • Min-Ho Jang (Department of Biology Education, Kongju National University)
  • Received : 2022.11.28
  • Accepted : 2022.12.12
  • Published : 2022.12.31

Abstract

This study carried out from March 2021 to October 2021 in the upper part (St. 1) and middle part (St. 2) section of Yongsu stream, a branch of the Geum river, using PIT telemetry to understand the movement patterns and habitat characteristics of Odontobutis interrupta, a Korean endemic species. O. interrupta collection was used kick net (5×5 mm) and fish trap (5×5 mm). After collecting fish, PIT tag insertion was performed immediately in the site. Reader (HPR Plus Reader, biomark, USA) and portable Antenna (BP Plus Portable Antenna, biomark, USA) were used for detection of fish to monitoring the tagged O. interrupta. As a result of PIT telemetry applied to 70 individuals, mean movement distance was 36.5 (SE, ±6.6) m. There was a significant difference between total length and movement distance (P≤0.05). O. interrupta was mainly identified in average water depth, 36.2±1.9 cm, average water velocity, 0.03±0.07 m s-1 and average distance from watershed, 4.4±0.3 m. Extent of rock used for habitat was varied from 32 to 4,000 cm2. There was no statistical difference between the area of the first selected rock and the area of the after selected rock (P>0.05). but there was significant difference between total length and the area of the rock except for detection before 24 hours (P<0.01). Therefore, to restore the habitat, it is considered necessary to create various substrate structures by providing various habitat environments (water depth, flow rate, stone, etc.) for each individual size.

본 연구는 고유종인 얼록동사리(Odontobutis interrupta) 의 이동 패턴과 서식지 특성을 파악하기 위해 PIT telemetry를 이용하여 금강 수계의 지류 하천인 용수천의 상류 지점(충남 공주시 반포면 공암리 공암교, St. 1)과 용수천 중류 지점 (세종특별자치시 금남면 두만리 백룡교. St. 2)에서 2021년 3월부터 10월까지 수행되었다. 어류 채집은 족대(망목: 5×5 mm)와 통발(5×5 mm)을 이용하였고, PIT tag 삽입은 현장에서 즉시 수행하였다. 총 21회 모니터링에서 70개체가 115회 감지되었으며, 분석결과 얼록 동사리의 평균 총이동거리는 36.5 (±6.6) m로 확인되었으며, 전장에 따른 얼록동사리의 이동거리는 크기가 큰 개체일수록 더 멀리 이동하는 것으로 나타났다 P≤0.05). 얼록동사리가 감지된 지점의 평균 수심은 36.2 (±1.9) cm, 평균유속은 0.03 (±0.07) m s-1 , 평균 수변부로부터의 거리는 4.4 (±0.3) m로 나타났다. 또한, 감지된 돌 면적에 대해 방류 후 최초선택하는 돌의 면적과 이후에 선택하는 돌의 면적을 비교한 결과 통계적으로 차이가 없는 것으로 나타났으나(P>0.05) 방류 후 24시간 이전 감지를 제외한 나머지 감지에 대한 전장과 돌의 면적을 비교한 결과 통계적으로 유의한 차이가 나타났다(P<0.01). 따라서, 서식지 복원을 위해서는 개체크기별 다양한 서식조건(수심, 유속, 돌 등)을 제공하여 개체별 다양한 하상 구조를 조성하는 것이 필요할 것으로 판단된다.

Keywords

Acknowledgement

이 논문은 2021년 공주대학교 학술연구지원사업의 연구지원에 의하여 연구되었음.

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