Optimization of culture conditions for larval GIFT tilapia Oreochromis niloticus using response surface methodology and effects of HAMP-1 and c-type lysozyme mRNA expression in liver
文献类型： 外文期刊
作者： Qiang, J. 1 ; He, J. 1 ; Xu, P. 1 ; Kpundeh, M. D. 2 ; Zhu, Z. X. 1 ;
作者机构： 1.Chinese Acad Fishery Sci, Key Lab Freshwater Fisheries & Germplasm Resource, Minist Agr, Freshwater Fisheries Res Ctr, Wuxi 214081, Jiangsu, Peoples R China
2.Nanjing Agr Univ, Wuxi Fisheries Coll, Wuxi 214081, Jiangsu, Peoples R China
期刊名称：AQUACULTURE INTERNATIONAL （ 影响因子：2.235； 五年影响因子：2.616 ）
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收录情况： SCI
摘要： Response surface methodology (RSM) in concert with central composite experimental design was firstly applied to optimize the culture condition for larval Genetically Improved Farmed Tilapia (GIFT) tilapia. Larvae were reared at different water temperature (16-37 A degrees C) and salinity (0-20 aEuro degrees) for 35 days. Results showed that the linear and quadratic effects of temperature and salinity on specific growth rate (SGR), survival and hepatic HAMP-1 mRNA levels were statistically significant (P < 0.05). The interacting effects of temperature and salinity on SGR and survival were significant (P < 0.05), but the interaction on the levels of hepatic HAMP-1 and c-type lysozyme mRNA was not significant (P > 0.05). A significant increase in the levels of c-type lysozyme mRNA was observed as salinity increases; the quadratic effects of salinity were insignificant (P > 0.05). The regression equations of SGR, survival, the levels of hepatic HAMP-1 and c-type lysozyme mRNA toward the two factors of interest were established using multiple regression analysis, with the coefficients of determination being 0.980, 0.982, 0.968, and 0.949, respectively (P < 0.01). Based on RSM, the optimal temperature/salinity combination was obtained at 28.2 A degrees C/6.8 aEuro degrees of which the greatest SGR (10.08 % day(-1)) and survival (91.34 %) were simultaneously attained. Adequately increasing salinity would improve growth, survival, and innate immune function in larval GIFT tilapia.
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