中文摘要：

为探究养殖密度对湿体质量为（132．75±0．51）g的豹纹鳃棘鲈生长和血液生化指标的影响，设计了低（9．34kg／m3）、中（19．23kg／m3）、高（37．22kg／m3）3个养殖密度，每个密度设3个重复，连续饱食投喂56d后取样，测定相关指标。试验结果表明，37．22kg／m3组的终末体质量、平均质量增加率和特定生长率均显著低于其他两组（P〈0．05），而9．34kg／m3、19．23kg／m3组间差异不显著（P〉0．05）；养殖密度对饲料系数、摄食率、瞬时生长率和热量单位生长系数无显著影响（P〉O．05）。血清总超氧化物歧化酶的活力在37．22kg／m3组最高，19．23kg／m3组最低，且各密度组间差异显著（P〈O．05）；37．22kg／m3组血清总抗氧化能力显著低于其他两组（P〈O．05），19．23kg／m3组高于9．34kg／m3组，但差异不显著（P〉O．05）；37．22kg／m3组血清丙二醛显著高于其他两组（P〈O．05），而其他两组间差异不显著（P〉O．05）；乳酸脱氢酶随养殖密度的升高显著增加，且各密度组间差异显著（P〈O．05）；37．22kg／m3组谷丙转氨酶、谷草转氨酶显著高于其他两组（P〈O．05），而37．22kg／m3组的溶菌酶活性显著低于其他两组（P〈0．05），其他两组间差异不显著（P〉0．05）；养殖密度对血浆葡萄糖、胆固醇、C反应蛋白、总蛋白、乳酸无显著影响。

英文摘要：

A 56-day experiment was performed at three stocking densities of low density （9. 34 kg/m3, Group L）, medium density （19.23 kg/m3, Group M） and high density （37.22 kg/m3, Group H） with triplication to evaluate the effects of stocking density on the growth, serum biochemical parameters of Plectropomus leopardus with initial body weight of （132.75±0.51） g. Results showed that the final body weight, percent weight gain and specific growth rate in Group H were significantly lower than those in Group M and Group L, while no significant difference were observed between Group M and Group L. No significant difference was observed in food conversion ratio, food intake, instantaneous growth rate and thermal-unit growth coefficient among three groups. Significant difference was observed on superoxide dis- mutase activity, with the maximum in Group H and the minimum in Group M. The total antioxidant ca- pacity in Group H was significantly lower than that in Groups M and L. There was significantly higher malondialdehyde level in Group H than that in Groups M and L, without significant difference between Group M and Group L. The lactic dehydrogenase activity increased with the augment of stocking density, with significant difference among the three groups. The glutamic-pyruvic transaminase level and glutamic- oxaloacetic transaminase level in Group H were statistically higher than those in Group M and Gruop L, while lysozyme activity was significantly lower than those in Group M and Group L. No significant differ- ence was observed on levels of plasma glucose, cholesterol, C-reactive protein, total protein, and lactic acid among the three groups.