한국어류학회지 (Korean Journal of Ichthyology)

  • 제19권4호
  • /
  • Pages.332-342
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  • 2007
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  • 1225-8598(pISSN)
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  • 2288-3371(eISSN)
한국어류학회 (The Ichthyological Society of Korea)
권호 표지

울진 연안에 분포하는 부유성 난 및 자치어의 종조성 및 양적변동

Quantitative Variation and Species Composition of Ichthyoplankton in Coastal Waters of Uljin, Korea

  • 한경호 (전남대학교 수산해양대학 해양기술학부) ;
  • 김동기 (전남대학교 수산해양대학 해양기술학부)
  • Han, Kyeong-Ho (Division of Fisheries and Ocean Sciences, Chonnam National University) ;
  • Kim, Dong-Gi (Division of Fisheries and Ocean Sciences, Chonnam National University)
  • 투고 : 2007.08.02
  • 심사 : 2007.11.06
  • 발행 : 2007.12.31
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초록

이 연구는 경상북도 울진 연안 해역에서 2002년 1월, 4월, 7월 및 10월까지 계절별로 총 4회에 걸쳐 만조시에 채집된 부유성 난 자치어의 종조성, 양적변동을 연구하였다. 연구기간 동안 채집된 부유성 난은 총 7개 분류군이 출현하여 멸치, 정어리, 까나리, 참가자미속 어류, 앨퉁이, 보리멸, 기타 난 등으로 분류되었고, 출현량을 보면, 멸치 난이 연구기간 동안 출현한 부유성 난의 38.34%를 차지하여 가장 우점도가 높았으며, 보리멸 난이 25.84%를 차지하였다. 연구기간 동안 출현한 자치어는 총 7목 18과 25개의 분류군이 출현하였고, 멸치가 연구기간 동안 출현한 자치어의 90.46%를 차지하여 최우점종이었으며, 다음으로 조피볼락이 자치어의 2.04%를 차지하였다. 이들 2종이 차지한 비율은 92.49%이었으며, 나머지 23개 분류군은 7.51%를 차지하였다. 2002년 울진에서 계절별 종 다양도지수(H')는 0.0878~2.3855였고, 균등도지수는 0.0451~0.9300로 나타났다. 우점도의 경우는 0.3000~0.9914로 종 다양도지수와 균등도지수와는 반대 경향을 보였다. 정점별로 분석한 종 다양도지수는 0.3035~0.7440으로 정점 2에서 가장 낮은 값을 나타냈고, 정점 1에서 가장 높은 값을 보였다. 우점도의 경우는 0.8919~0.9669로 종 다양도지수와 균등도지수와는 반대 경향을 보였다. 계절별 군집의 유사도는 여름과 가을에 상대거리 차(0.010)가 가장 적어 군집상이 매우 유사하였고, 정점별로는 정점 1과 정점 4에서 가장 적은 상대거리 차(0.014)를 보여 군집상이 매우 유사하였다.

Species composition and quantitative and body length composition of the ichthyoplankton were investigated by samples collected from the coastal waters of uljin in January, April, July and October, 2002. During the study, the collected fish eggs were identified as belonging to 7 taxa. The most of dominant species Engraulis japonicus, were accounted for 38.34% of the total fish eggs, followed by Sillago sihama (25.84%). The collected larvae and juveniles were identified into 25 taxa, 18 families, 7 orders. The domninant species Engraulis japonicus accounted for 90.46% of the total larvae and juveniles, followed by Sebastes schlegeli 2.04%. These 2 taxa constituted 92.50% of the total collected larvae and juveniles. The diversity index of species per months of the collected juveniles the coastal water of Uljin, 2002 was 0.0878~2.3855 and the evenness index was 0.0451~0.9300. in case of dominance index was 0.3000~0.9914 against the evenness index. The analyzed species diversity index by the each stations was 0.3035~0.7440 and the dominance index was 0.8919~0.9669 against the species diversity index. The similarity of community structure per season was very high because of the relative difference (0.010), which was the least in Summer and Fall. In addition, the community structure was very similar in state 1 and state 4 out of each stations because the relative difference was the least, 0.139.

키워드

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