Korean Journal of Ichthyology (한국어류학회지)

The Ichthyological Society of Korea (한국어류학회)
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Community Structure of Larval Fish Assemblage in the Coastal Waters of South-central Korea during Spring and Summer

봄-여름 남해 중부 연안 자어 군집구조

  • Yoo, Joon-Taek (Fisheries Resources and Environment Division, South Sea Fisheries Research Institute, National Fisheries Institute of Fisheries Science) ;
  • Kim, Yeong Hye (Fisheries Resources and Environment Division, South Sea Fisheries Research Institute, National Fisheries Institute of Fisheries Science) ;
  • Lee, Seung Hwan (Fisheries Resources and Environment Division, South Sea Fisheries Research Institute, National Fisheries Institute of Fisheries Science) ;
  • Kim, Jin-Koo (Department of Marine Biology, Pukyong National University)
  • 유준택 (국립수산과학원 남해수산연구소 자원환경과) ;
  • 김영혜 (국립수산과학원 남해수산연구소 자원환경과) ;
  • 이승환 (국립수산과학원 남해수산연구소 자원환경과) ;
  • 김진구 (부경대학교 자원생물학과)
  • Received : 2017.02.21
  • Accepted : 2017.03.15
  • Published : 2017.03.31
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Abstract

We examined monthly variations in community structure of larval fish assemblage in the coastal waters of south-central Korea in spring and summer, 2016. A total of 31 taxa of larvae were collected during the study period. Engraulis japonicus larvae were predominated in spring than summer. The larvae of Cynoglossus abbreviates, a spring spawners, were exclusively collected in spring, while those of Nibea albiflora, a summer spawners, were exclusively caught in summer. Due to those seasonal differences in abundance of the dominant species, larval fish community was divided into two main seasonal groups (i.e. April~May and June~August). In addition, summer group was divided into two significant subgroups (June~July and August). During August, the larvae of E. japonicus and N. albiflora sharply decreased in abundance due to abnormally high sea water temperature that was raised up to $28^{\circ}C$, with the temperature being out of range of their optimum spawning temperature.

본 연구는 남해 중부 연안역에서 2016년 4~8월까지 자어군집구조의 월 변화를 조사하였다. 조사기간 동안 총 42종의 자어가 출현하였다. 우점종 중 멸치(E. japonicus)는 여름보다는 봄철에 우점하였고, 용서대(C. abbreviates)는 봄철에만 출현하였으며 수조기(N. albiflora)는 여름철에만 출현하였다. 자어 군집은 계절별로 4~5월 (봄)과 6~8월 (여름)의 그룹으로 유의하게 나눌 수 있었고, 여름철은 또다시 6~7월과 8월의 두개의 유의한 그룹으로 나눌 수 있었다. 2016년 8월 조사해역에서는 이상 고수온 현상이 발생하여 표면수온이 $28^{\circ}C$까지 상승하였고, 멸치와 수조기 자어의 출현량은 산란 적정수온을 넘은 수온으로 인해 급감하였다.

Keywords

References

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