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Seasonal variation in species composition of catch by a coastal beam trawl in Jinhae Bay and Jinju Bay, Korea

진해만과 진주만에서 새우조망으로 어획된 수산자원의 계절변동

  • Song, Mi-Young (Inland Fisheries Research Institute, NFRDI) ;
  • Kim, Joo Il (Southeast Sea Fisheries Research Institute, NFRDI) ;
  • Kim, Sung Tae (Fisheries Resources Research Division, National Fisheries Research & Development Institute) ;
  • Lee, Jong Hee (Fisheries Resources Research Division, National Fisheries Research & Development Institute) ;
  • Lee, Jae Bong (Dokdo Fisheries Research Center, NFRDI)
  • 송미영 (국립수산과학원 중앙내수면연구소) ;
  • 김주일 (국립수산과학원 남동해수산연구소) ;
  • 김성태 (국립수산과학원 자원관리과) ;
  • 이종희 (국립수산과학원 자원관리과) ;
  • 이재봉 (국립수산과학원 독도수산연구센터)
  • Received : 2012.10.23
  • Accepted : 2012.11.25
  • Published : 2012.11.30

Abstract

The species composition and seasonal variation of fisheries resources in Jinhae bay and Jinju bay, were studied using shrimp beam trawl through a year of 2010. During the study period, a total of 117 species were collected in Jinhae bay. Species included were 63 species in Pisces and 24 in Crustacea. And a total of 106 species were collected in Jinju bay. Species included were 57 species in Pisces and 31 in Crustacea. The dominant species were Zoarces gilli, Crangon hakodatei and Oratosquilla oratoria in Jinhae bay, and Crangon hakodatei, Leiognathus nuchalis and Charybdis bimaculata in Jinju bay. The samples were mainly grouped according to the location and season on the SOM. Group 1 with sample sites in Jinju bay, was characterized by high values of Parapenaeopsis tenella, Leiognathus nuchalis and Hexagrammos otakii. Group 2 with sample sites in April, were dominant Crangon hakodatei and Luidia quinaria. The samples in Group 3 were high values of Charybdis bimaculata and Pleuronichthys cornutus. Group 4 with sample sites in Jinhae bay, was characterized by high densities of Zoarces gilli and Pholis fangi. The dominant species, Crangon hakodatei, were catched egg-bearing females until June. Zoarces gilli and Leiognathus nuchalis were presented small size individuals during study period. It represented that study area is an important role in spawning and nursery ground for fisheries resources.

Keywords

Fisheries resources;Shrimp beam trawl;Self-organizing map (SOM);Jinhae bay;Jinju bay

Acknowledgement

Supported by : 국립수산과학원

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