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Species composition and community structure of fish by shrimp beam trawl between Sacheon Bay and coastal waters off Namhae, Korea

사천만과 남해연안에서 새우조망에 어획된 어류의 종조성 및 군집구조

  • SONG, Se Hyun (Fisheries Resources Research Center, National Institute of Fisheries Science) ;
  • JEONG, Jae Mook (Fisheries Resources Research Center, National Institute of Fisheries Science) ;
  • LEE, Seung Hwan (Fisheries Resources Research Center, National Institute of Fisheries Science) ;
  • KIM, Do Hoon (Department of Marine & Fisheries Business and Economics, Pukyong National University)
  • 송세현 (국립수산과학원 수산자원연구센터) ;
  • 정재묵 (국립수산과학원 수산자원연구센터) ;
  • 이승환 (국립수산과학원 수산자원연구센터) ;
  • 김도훈 (부경대학교 해양수산경영학과)
  • Received : 2019.05.23
  • Accepted : 2019.08.07
  • Published : 2019.08.31

Abstract

It was turned out by shrimp beam trawl monthly survey from March, 2015 to February, 2016 that different species composition and abundance of the fish assemblages in Sacheon Bay and coastal waters off Namhae, Korea were compared. As a result of monthly measured sea temperature and salinity of Sacheon Bay and coastal waters off Namhae, sea temperature of both areas was changed seasonally; however, differences in sea temperature occurred during certain periods depending on the region. Salinity was generally low in Sacheon Bay affected by fresh water, and both areas was low in summer and high in winter. A total of 73 species representing 37 families were collected in Sacheon Bay. The dominant fish species in terms of numbers and biomass were Liparis tanakae, $23,077inds./km^2$, $332.1kg/km^2$. A total of 91 fish species representing 49 families were collected in coastal waters off Namhae. The dominant fish species in terms of numbers were Leiognathus nuchalis, $139,683inds./km^2$ and biomass were Chelidonichthys spinosus, $1,078.6kg/km^2$. Analysis of dendrogram of the clustering showed that Sacheon Bay and coastal waters off Namhae were distinctive featured (global R = 0.691, p = 0.017). And except of summer season (July-October), there was a distinctive feature seasonally (global R = 0.844, p = 0.001). The fish species that appeared in common in both areas, where fish species caught in Sacheon Bay, an important inner bay,were smaller than those caught in coastal waters off Namhae appeared. It presented that Sacheon Bay plays a more important role in spawning and nursery ground for fisheries resource than coastal waters off Namhae, Korea.

Keywords

Shrimp beam trawl;Community structure of fish;Sacheon bay;Coastal waters off Namhae;Korea

Acknowledgement

Supported by : 국립수산과학원

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