Korean Journal of Fisheries and Aquatic Sciences (한국수산과학회지)

The Korean Society of Fisheries and Aquatic Science (한국수산과학회)
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Distribution of Fish Eggs, Larvae and Juveniles around the Youngsan River Estuary

영산강 하구역 주변해역의 난자치어 분포

  • KIM Jin Koo (Mokpo Laboratory, National Fisheries Research and Development Institute) ;
  • CHOI Jeong Il (Mokpo Laboratory, National Fisheries Research and Development Institute) ;
  • CHANG Dae Soo (Jeju Fisheries Research Institute, National Fisheries Research and Development Institute) ;
  • NA Jong Tae (Department of Marine Resources, Mokpo National University) ;
  • KIM Yong Uk (Department of Marine Biology, Pukyong National University)
  • 김진구 (국립수산과학원 남해수산연구소 목포분소) ;
  • 최정일 (국립수산과학원 남해수산연구소 목포분소) ;
  • 장대수 (국립수산과학원 제주수산연구소) ;
  • 나종태 (목포대학교 해양자원학과) ;
  • 김용억 (부경대학교 해양생물학과)
  • Published : 2003.10.01
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Abstract

Distribution of ichthyoplanktons and its relation to environmental factors (temperature, salinity, $chlorophyll\;\alpha$) around the Youngsan River Estuary of Mokpo, southwest coast of Korea were investigated based on the samples collected bimonthly from February to December, 2001. Unidentified fish eggs were most abundant $1,345\;eggs/100m^3$ in August, while eggs of Engraulis japonicus were most abundant $63\;eggs/100m^3$ in June. A total of forty species of fish larvae and juveniles belonging to the twenty families under six orders were caught, with six gobiids, four icefishes, four croakers and three herrings being represented. Fish larvae and juveniles peaked $17,757\;inds./100m^3$ in August, which consisted of $91.02\%$ of gobiids, $3.69\%$ of gunnels and $3.67\%$ of icefishes, and they were most abundant $7,467\;Inds./100m^3$ at St. 7. Cluster analysis based on the individuals of fish larvae and juveniles showed that six months were classified into two groups at the dissimilarity 70, the first was composed of June and August and the second was February and December and April and October were not clustered with any other months. In August when species diversity index was the highest, eight stations were classified into two groups at the dissimilarity 70, the first was composed of St. 1, 3, 4, 5 and 8 and the second was St. 6, 7 and 2. As a result from correspondence analysis, there is no effect of the environmental factors with a density of fish eggs and larvae, but correlation could be found between a density of fish eggs and $chlorophyll\;\alpha.$

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References

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