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Seasonal variation of fisheries resources composition in the coastal ecosystem of the middle Yellow Sea of Korea

서해 중부 연안생태계 수산자원의 종조성과 계절변동

  • Lee, Jae-Bong (Fisheries Resources Research Division, National Fisheries Research and Development Institute) ;
  • Lee, Jong-Hee (Fisheries Resources Research Division, National Fisheries Research and Development Institute) ;
  • Shin, Young-Jae (Fisheries Resources Research Division, National Fisheries Research and Development Institute) ;
  • Zhang, Chang-Ik (Division of Marine Production System Management, Pukyong National University) ;
  • Cha, Hyung-Kee (Fisheries Resources Research Division, National Fisheries Research and Development Institute)
  • 이재봉 (국립수산과학원 자원연구과) ;
  • 이종희 (국립수산과학원 자원연구과) ;
  • 신영재 (국립수산과학원 자원연구과) ;
  • 장창익 (부경대학교 해양생산시스템관리학부) ;
  • 차형기 (국립수산과학원 자원연구과)
  • Received : 2010.02.22
  • Accepted : 2010.05.12
  • Published : 2010.05.31

Abstract

To investigate seasonal variation of fisheries resources composition and their correlationships with environmental factors in the coastal ecosystem of the middle Yellow Sea of Korea, shrimp beam trawl were carried out for the fisheries survey. Fisheries resources of 81 species, 57 families, and 6 taxa totally were collected by shrimp beam trawl in the middle coastal ecosystem of Yellow Sea of Korea. Species were included 6 species in Bivalvia, 6 in Cephalopoda, 22 in Crustacea, 2 in Echinodermata, 5 in Gastropoda, and 40 in Pisces. Diversity indices (Shannon index, H') showed seasonal variation with low value of 2.14 in winter, and high value of 2.67 in spring. Main dominant species were Oratosquilla oratoria, Octopus ocellatus, Acanthogobius lactipes, Cynoglossus joyneri, Rapana venosa venosa, Loligo beka, Chaeturichthys stigmatias, Raja kenojei, Microstomus achne and Paralichthys olivaceus, that were occupied over 58% of total individuals, and 55% of wet weight. Fisheries organism made four coordinative seasonal groups by the principal component analysis (PCA), showing stronger seasonal variation than spatial variation. PC from PCA showed statistically significant cross-correlationships with seawater temperature, $NH_4$-N, TP and chlorophyll a (P < 0.05).

Keywords

Coastal ecosystem;Middle Yellow Sea;Seasonal variation;Fisheries resources composition;Principal component analysis

Acknowledgement

Grant : 연근해 어업자원 평가 및 관리연구

Supported by : 국립수산과학원

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