期刊
FISHERIES SCIENCE
卷 76, 期 5, 页码 737-745出版社
SPRINGER JAPAN KK
DOI: 10.1007/s12562-010-0274-y
关键词
Crassostrea gigas; Starvation; Biochemical composition; Gametogenesis
类别
资金
- National High Technology Research and Development Program [2006AA10A409]
- 973 Program [2010CB126406]
The effects of starvation on biochemical composition and gametogenesis were investigated in the Pacific oyster Crassostrea gig,as. Histological analysis, combined with oocyte examination and measurements of protein, glycogen and lipid levels and RNA/DNA ratio from gonad, adductor muscle and mantle tissue of each sex were performed. In the starved groups, C. gigas showed gonad development, but the progress was delayed during the experiment. Glycogen was the first substrate used by C. gigas for dealing with lack of food. While glycogen was rapidly consumed, protein and lipid contents decreased gradually. A decrease in the RNA/DNA ratio in the starved groups in all the body components was found during starvation, illustrating that RNA/DNA ratio was a valid indicator of nutritional condition in C. gigas. A significant increase in water and ash contents and a corresponding decrease in condition index were observed in the starved groups, showing that the water and ash content and condition index were related to the usage of glycogen, lipid and protein reserves in body composition. During starvation, energy reserves were mobilized for survival and gonad development, but spawning was arrested. The information obtained in this study is useful for broodstock management in the Pacific oyster industry.
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