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http://dx.doi.org/10.9710/kjm.2012.28.3.215

Ecophysiological Characteristics Changes in the Pacific Oyster, Crassostrea gigas, after Spawning Season in Off-bottom Culture  

Kim, Su Kyoung (West Sea Fisheries Research Institute, National Fisheries Reseach & Development Institute)
Choi, Eun Hee (West Sea Fisheries Research Institute, National Fisheries Reseach & Development Institute)
Han, Hyun Seob (West Sea Fisheries Research Institute, National Fisheries Reseach & Development Institute)
Lim, Hyun Jeong (West Sea Fisheries Research Institute, National Fisheries Reseach & Development Institute)
Publication Information
The Korean Journal of Malacology / v.28, no.3, 2012 , pp. 215-223 More about this Journal
Abstract
The ecophysiological characteristics of the oyster Crassostrea gigas in Taean area, west coast of Korea, were investigated after main spawning season from September 2011 to January 2012 to confirm the recovery process of condition. The cupped oysters, from 4 different off-bottom culture areas were compared the gonad indices, histological analysis combined with measurement of RNA/DNA contents and ratios in gonad of each sex were undertaken. To evaluate the health condition of oyster after spawning, the RNA/DNA ratio in adductor muscle, fatness and condition index (CI) were used. The results showed that cupped oysters cultured in Uihang coastal area were different physiological aspects than other experiment areas, namely continuously decreasing RNA/DNA content and ratio in adductor muscle, lowest CI and fatness. Oysters cultured in Iwon Station 1 and 2 showed fast recovery in RNA/DNA, increase in fatness and CI during post-spawning stage until October rapidly and there after it decreased. Oysters in Shinduri showed rapidly decrease in fatness and CI until October. On the contrary to this factors, RNA/DNA ratio in adductor muscle increased as like protein until October. Partially spawning season could be observed until December in Shinduri and Iwon Station 1.
Keywords
oyster; Crassostrea gigas; RNA/DNA ratio; Off-bottom culture; Condition indices;
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Times Cited By KSCI : 2  (Citation Analysis)
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