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http://dx.doi.org/10.5657/kfas.2009.42.5.481

Variation of Body Composition and Survival Rate According to Spawning of Pacific Oyster, (Crassostrea gigas) in Gamak Bay  

Kim, Chul-Won (South Sea Fisheries Research Institute, National Fisheries Research and Development Institute(NFRDI))
Kim, Eung-O (South Sea Fisheries Research Institute, National Fisheries Research and Development Institute(NFRDI))
Jeong, Hee-Dong (South Sea Fisheries Research Institute, National Fisheries Research and Development Institute(NFRDI))
Jung, Choon-Goo (South Sea Fisheries Research Institute, National Fisheries Research and Development Institute(NFRDI))
Park, Min-Woo (Division of Aquaculture Management, NFRDI)
Son, Sang-Gyu (South Sea Fisheries Research Institute, National Fisheries Research and Development Institute(NFRDI))
Publication Information
Korean Journal of Fisheries and Aquatic Sciences / v.42, no.5, 2009 , pp. 481-486 More about this Journal
Abstract
In 2007, 43.5% mortality of the cultured oyster population occurred in Gamak Bay. Mortality rapidly increase in September and peak in October. To prevent future mass-mortality event, we investigated spawning and variation of oyster body composition. The main spawning period of culture oyster occurred from August to September. Condition index and body composition (protein and glycogen) appeared to be influenced by the spawning activity. Condition index and glycogen content in September were lowest (13.5% and 5.6 mg/g, respectively). However, protein, lipid and glycogen contents did not rapidly recover after the spawning activity. The data indicates that mass-mortality of cultured oysters in Gamak Bay may be due to deteriorated health, spawning activity, stress of the high water temperature and decreasing food resources.
Keywords
Crassostrea gigas; Mass-mortality; Spawning; Body composition;
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