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BAI Yucen, ZHANG Tao, QIU Tianlong, GAO Yan, ZHANG Xiaofang. Nutrient effects of broodstocks on the larvae in Patinopecten yessoensis[J]. Journal of Oceanology and Limnology, 2015, 33(4): 988-996

Nutrient effects of broodstocks on the larvae in Patinopecten yessoensis

BAI Yucen1,2, ZHANG Tao1, QIU Tianlong1, GAO Yan3, ZHANG Xiaofang4
1 Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;
2 University of Chinese Academy of Sciences, Beijing 100049, China;
3 Tianjin Bohai Sea Fisheries Research Institute, Tianjin 300457, China;
4 Zhangzi Island Fishery Group, Ltd., Dalian 116001, China
Patinopecten yessoensis is a commercial valuable species. This study deals with the effect of nutrient effects of the broodstock (mainly ovaries) on the larvae. Concentrations of total carbohydrate, total protein and total lipid in the gonads of P. yessoensis from three Hatcheries (Hatchery 1, Hatchery 2, and Hatchery 3) were determined before and after spawning. The relationship between the nutrient concentration in ovaries before spawning (BC) and that of larvae (LC) was assessed as well as the change in nutrient levels in ovaries after spawning (DC). Results indicate that the BC of total carbohydrate (7.66%) and total lipid (14.48%) in ovaries were significantly higher than in testes (5.20%, 5.20% respectively), whereas the BC of total protein in the ovaries was lower (61.76%) than in the testes (81.67%). The different gonadal composition suggests the different nutrient demands between male and female broodstocks in breeding season. P atinopecten yessoensis gonads contained a higher proportion of lipids, in comparison to other bivalves, which might be a response to the low ambient water temperatures. Further analysis of fatty acids showed that the concentrations of n-3PUFA, EPA and DHA in larvae (LC) were positively correlated with BC and DC, indicating the significant nutrient influence of broodstocks on the larvae. As these fatty acids are important in metabolism, and have been demonstrated to be influential to the viability of the larvae, larval growth and the settlement, spat growth, and juvenile survival in many bivalves, they could possibly be used as indexes to evaluate, and predict condition of broodstocks and larvae.
Key words:    Patinopecten yessoensis|nutrient composition|fatty acids|larvae|broodstocks|gonads   
Received: 2014-07-09   Revised: 2015-01-04
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