Korean Journal of Ichthyology (한국어류학회지)

The Ichthyological Society of Korea (한국어류학회)
권호 표지

Depth-dependent Variability of Fish Fauna in the Coastal Waters off Hupo, East Sea

동해 후포 연안 어류상의 수심별 차이

  • Lee, Chung Il (Department of Marine Bioscience, Gangneung-Wonju National University) ;
  • Jung, Hea Kun (Department of Marine Bioscience, Gangneung-Wonju National University) ;
  • Kwon, Soon Man (Department of Marine Bioscience, Gangneung-Wonju National University) ;
  • Han, Moon Hee (Department of Marine Bioscience, Gangneung-Wonju National University) ;
  • Seol, Kang Su (Department of Marine Bioscience, Gangneung-Wonju National University) ;
  • Park, Joo Myun (Department of Marine Bioscience, Gangneung-Wonju National University)
  • 이충일 (강릉원주대학교 해양자원육성학과) ;
  • 정해근 (강릉원주대학교 해양자원육성학과) ;
  • 권순만 (강릉원주대학교 해양자원육성학과) ;
  • 한문희 (강릉원주대학교 해양자원육성학과) ;
  • 설강수 (강릉원주대학교 해양자원육성학과) ;
  • 박주면 (강릉원주대학교 해양자원육성학과)
  • Received : 2018.01.09
  • Accepted : 2018.02.14
  • Published : 2018.03.31
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Abstract

The temporal and depth-related variations in the species composition and abundance of demersal fish assemblage were studied in the coastal waters off Hupo, East Sea. Fish samples were collected seasonally between 2011 and 2017 at two stations of study area using trammel net and bottom gill net. In total, 46 fish species belonging to 17 families were collected during study period, with 36 and 22 species occurring in depths of ~80 m (site A) and ~140 m (site B), respectively. Glyptocephalus stelleri, Cleisthenes pinetorum and Gymnocanthus herzensteini were abundant at shallower site, and Dasycottus setiger at deeper site. The number of species, abundance, biomass and diversity fluctuated with water depth, but not temporally (both seasonally and annually). Analysis of similarity (ANOSIM) revealed that the fish assemblage structures were significantly different with water depth, but not by year or season. Non-metric multidimensional scaling (MDS) ordination plot emphasized visually in spatial difference of fish assemblages, and it was due to differential contributions of dominant species in relation to water depth and temperature.

본 연구는 동해 중부 후포 연안에 서식하는 어류 군집의 계절 및 수심에 따른 차이를 분석하였다. 연구에 사용된 어류 시료는 2011년과 2017년 사이에 계절별로 저층자망과 삼중자망을 이용하여 채집하였다. 총 17과에 속하는 46종의 어류가 채집되었고, 정점 A (수심 약 80 m)에서 36종, 정점 B (수심 약 140 m)에서는 22종이 채집되었다. 현존량에서 우점종은 기름가자미(Glyptocephalus stelleri), 용가자미(Cleisthenes pinetorum), 대구횟대 (Gymnocanthus herzensteini), 고무꺽정이(Dasycottus setiger) 였는데, 전자의 3종은 얕은 수심(정점 A)에서 더 많이 채집되었고, 후자 1종은 깊은 수심(정점 B)에서 현존량이 더 높았다. 조사해역 어류 군집의 종수, 현존량, 생체량, 종다양도는 수심에 따라 변하였지만, 시간(계절 또는 연도)에 따라 유의한 차이는 없었다. ANOSIM (Analysis of similarity) 결과 또한 어류 군집 구조는 수심에 따라 차이가 유의하였지만, 연도 또는 계절에 따라 유의한 차이가 없는 것으로 보여주었다. nMDS (Non-metric multidimensional scaling) 결과는 이러한 군집 구조가 시각적으로 뚜렷이 구분되었고, 이러한 구분은 수심과 수온 차이에 따른 우점종의 공간분포 차이 때문으로 설명할 수 있었다.

Keywords

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