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Condition index and hemocyte apoptosis as a health indicator for the Pacific oysters, Crassostrea gigas cultured in the western coastal waters of Korea
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  • Journal title : The Korean Journal of Malacology
  • Volume 30, Issue 3,  2014, pp.189-196
  • Publisher : The Malacological Society of Korea
  • DOI : 10.9710/kjm.2014.30.3.189
 Title & Authors
Condition index and hemocyte apoptosis as a health indicator for the Pacific oysters, Crassostrea gigas cultured in the western coastal waters of Korea
Lim, Hyun Jeong; Lim, Mae Soon; Lee, Won Young; Choi, Eun Hee; Yoon, Ju Hyun; Park, Seung Yoon; Lee, Seung Min; Kim, Su Kyoung;
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A significant production decrease has been witnessed for the Pacific oysters, Crassostrea gigas farmed in the western coastal waters of Korea, presumably by the loss of physiological viability. We evaluated the viability in terms of health indicators, the condition indices and hemocyte apoptosis rates of the oysters inhabiting two representative farming sites, Incheon and Taean each with different environmental variables. In our monthly measurements for the whole year 2013, the indicators were location specific. The condition indices of Incheon were highly variable, 1.67-8.58%, while those of Taean were less, 2.28-5.57%. The condition indices decreased during the spawning seasons, July and September in common. The two oysters exhibited also differed in the apoptotic activities of hemocyte, highly active, 4.03-30.15% for Incheon oysters and less active, 2.87-17.48% for Taean oysters. One thing we could identify was the two measurements were adverse during the critical seasons of spawning, reminiscent of being a useful tool for a health indicator for the oysters. Similar trend was also observed in the time when change in temperature was extreme. The findings in this study are highly indicative of health indicators for the oyster aquaculture.
oyster;Crassostrea gigas;condition index;hemocyte;apoptosis;
 Cited by
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