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Effects of Environmental Characteristics on the Production of Shellfish in Deukryang Bay, Korea

득량만의 조개류 생산량과 환경요인 관계 분석

  • 조은섭 (국립수산과학원 수산해양종합정보과) ;
  • 임월애 (국립수산과학원 수산해양종합정보과) ;
  • 황재동 (국립수산과학원 수산해양종합정보과) ;
  • 서영상 (국립수산과학원 수산해양종합정보과)
  • Received : 2011.07.04
  • Accepted : 2011.09.28
  • Published : 2011.10.31

Abstract

This study was carried out to determine marine environments and phytoplankton community in Deukryang Bay during the period of summer in 1987-2010. Water temperature, salinity, pH and dissolved oxygen were shown in much yearly fluctuations. In August, water temperatures in surface and on bottom were the highest, compared with average surface (24.54$^{\circ}C$) and bottom (22.90$^{\circ}C$) water temperature for 18 years in Deukryang Bay. The main reason is assumed to longer duration of sunshine during the period of August. Although the amount of the rainfall in August was the highest, significant impact of marine environment did not show. Most of dissolved inorganic nitrogen and phosphate in Deukryang were lower concentration during summer and N:P ratio also showed below 18 in Redfield. In particular, extreme increasing of N:P ratio in August was occurred by intensive precipitation. Distribution of phytoplankton community was a consistent occurrence for 18 years. The genus of Chaetoceros, Cosinodisucs and Skeletonema were regarded as the represent diatom, whereas the highest occurrence of genus among dinofagellates was Ceratium. It is thought that the relationship between phytoplankton and nutrient has a strong positive signal, although nutrients persist a little concentration and much fluctuations in marine environments were observed. High availability in phytoplankton is contributed to consistently provide the food organism of shellfish. Consequently, recent decreasing production of shellfish and seed are probably associated with higher temperature during the period of summer. However, higher temperature is also occurred ago and after 2000. On the basis of geography, Deukryang Bay had a small mouth and long channel, which is attributed to decreasing genetic diversity. It is assumed that higher temperature and lower genetic diversity have a extreme impact of larvae and shellfish for reproduction in Deukryang. It is necessary to persistently monitor based on water quality and phytoplankton community.

Keywords

References

  1. 공영세, 이병걸, 1994, 득량만의 퇴적물 및 부유물 특성, 한국해양학회지, 29(3), 269-277.
  2. 김도희, 박청길, 1998, 득량만 퇴적물로부터 영양염 용출 평가, 한국환경과학회지, 7(4), 425-431.
  3. 김정배, 박정임, 정춘구, 최우정, 이원찬, 이용화, 2010, 가막만 빈산소 수괴 수멸기의 물리화학적 특성, 해양환경안전학회지, 16(3), 241-248.
  4. 김철원, 권승배, 허성범, 2006, 득량만에서 조개류 유생의 분포, 한국양식학회지, 19(4), 288-298.
  5. 김학균, 최우정, 정영균, 정창수, 박종수, 안경호, 백철인, 1999, 나로도 인근해역에서 Cochlodinium polykrikoides 적조의 최초발생과 환경, 수진연구보고, 57, 119-129.
  6. 류상옥, 김주용, 장진호, 조영길, 신상은, 은고요나, 2006, 조간대성 해빈 퇴적물의 이동양상에 관한 연구 1. 한국 남해안의 득량만, 한국지구과학회지, 27(2), 221-235.
  7. 마채우, 홍성윤, 임현식, 1995, 득량만의 저서동물 분포, 한국수산학회지, 28(4), 503-516.
  8. 양한섭, 김성수, 김규범, 1995, 득량만 표층수중 영양염류의 시공간적 분포특성 1. 영양염류의 계절변화와 기초생산 제한인자, 한국수산학회지, 28(4), 475-488.
  9. 유성규, 2000, 천해양식, 구덕인쇄사, 639.
  10. 윤양호, 1999, 득량만 식물플랑크톤 군집의 시․공간적 분포특성, 한국환경생물학회지, 17(4), 481-492.
  11. 윤양호, 2003, 득량만 표층 퇴적물 중 유기물의 시.공간적 분포 및 기원, 환경과학회지, 12(7), 735-744.
  12. 윤호섭, 정형택, 곽은주, 라성주, 최상덕, 2001, 고수온기가막만 피조개 (Scapharaca broughtonii) 양식장 환경과 대량폐사, 공동학술대회 발표 요약집, 한국어업기술학회, 371-372.
  13. 이병걸, 조규대, 최용규, 1996, 득량만의 조석주기 및 계절변동에 따른 투명도의 변동특성, 한국어업기술학회지, 32(4), 386-394.
  14. 이재철, 노홍길, 조규대, 신상일, 김상우, 김상현, 1995, 1992년 하계 득량만 서부해역의 조류 특성, 한국수산학회지, 28(1), 1-6.
  15. 조현서, 김용옥, 이규형, 1999, 득량만 남서해역의 계절별 수질변동 특성, 가을학술 발표회 초록집, 한국환경과학회, 216-217.
  16. 최용규, 조규대, 이병걸, 홍철훈, 1995, 수심에 따른 득량만 키조개 어장의 환경 특성, 한국어업기술학회지, 31(2), 127-141.
  17. 최용규, 홍성근, 1997, 여름철 득량만의 열속과 관련한성층, 한국환경과학회지, 6(6), 579-587.
  18. 한동훈, 홍성윤, 마채우, 1995, 득량만이 동물플랑크톤의 분포, 한국수산학회지, 28(4), 517-532.
  19. 해양수산부, 2002, 해양환경공정시험방법, 해양수산부, 330.
  20. Avise, J. C., 1994, Molecular markers, natural history and evolution. Sunderland, MA: Sinauer Associates, 511.