한국어류학회지 (Korean Journal of Ichthyology)

  • 제27권2호
  • /
  • Pages.104-115
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  • 2015
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  • 1225-8598(pISSN)
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  • 2288-3371(eISSN)
한국어류학회 (The Ichthyological Society of Korea)
권호 표지

낙동강 하구역 부유성 자치어 종조성의 시·공간 변동

Spatio-temporal Variations in Species Composition and Abundance of Larval Fish Assemblages in the Nakdong River Estuary, Korea

  • 최희찬 (국립수산과학원 수산해양종합정보과) ;
  • 박주면 (맥쿼리대학교 생물학부) ;
  • 허성회 (부경대학교 해양학과)
  • Choi, Hee Chan (Fishery and Ocean Information Division, National Fisheries Research and Development Institute, Department of Oceanography) ;
  • Park, Joo Myun (Department of Biological Sciences, Macquarie University) ;
  • Huh, Sung Hoi (Department of Oceanography, Pukyong National University)
  • 투고 : 2015.04.11
  • 심사 : 2015.06.24
  • 발행 : 2015.06.30
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초록

2010년 9월부터 2011년 8월까지 매월 소조기에 낙동강 하구역의 안쪽과 바깥쪽 두 개 정점에서 자치어를 채집하여 종조성의 시공간 분포를 밝혔다. 연구기간 동안 출현한 자치어는 총 7목 26과에 속하는 43개 분류군이 출현하였으며, 망둑어과 자치어가 전체 개체수의 63.1%를 차지하여 가장 우점하였다. 그중 하계 출현 망둑어과 자치어가 개체수비 55.5%로 가장 많이 채집되었다. 그 다음으로 청어 (13.2%), 멸치 (13.0%), 그리고 춘계 출현 망둑어과 자치어 (4.6%), 전어 (3.8%), 동계 출현 망둑어과 자치어 (3.1%), 정어리 (1.2%), 웅어 (0.7%) 순으로 채집되었고, 이들 8개 분류군이 전체 자치어 출현량의 95.0%를 차지하였다. 본 연구에서 출현한 자치어 군집은 총 5개의 그룹으로 구분되었으며, 시기적으로 봄, 여름 및 가을, 그리고 겨울 그룹으로 분리되었다. 특히 여름 및 가을에 자치어 군집의 공간적 분리가 나타났다. 하구역의 안쪽 정점에서는 하계 출현 망둑어과 자치어가 우점하였으며, 바깥 정점에서는 망둑어류 외에 멸치가 우점하였고, 기타 다양한 해수어종의 자치어가 출현하였다.

The species composition of larval fish assemblages in the Nakdong River estuary, Korea, was determined using monthly samples collected between September 2010 and August 2011 at two stations. A total of forty three larval species were collected during the study. Among forty three taxa of fish larvae, summer gobies, Clupea pallasii, Engraulis japonicus, spring gobies, Konosirus punctatus, winter gobies, Sardinops melanostictus, Coilia nasus were dominant taxa, and these eight taxa accounted for 95.0% in the total number of individuals. Species composition and abundance varied greatly spatio-temprally showing the peak abundances of fish larvae in August 2011, and a few fish larvae were occurred in November 2010. Cluster analysis based on the number of individuals of fish larvae showed that 21 month-station sampling units were classified into five groups at the similarity level of 50%, and the results of ANOSIM and SIMPER analysis revealed significant differences in community structure among five groups.

키워드

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