对凡纳滨对虾（Litopenaeus vannamei）与点带石斑鱼（Epinephelus malabaricus）进行90 d 的混养试验，研究点带石斑鱼混养密度、规格对凡纳滨对虾生长、成活率和产量的影响。结果表明，点带石斑鱼混养密度、规格均对凡纳滨对虾生长、成活率和平均产量的影响有统计学意义（P <0.05）。在混养密度相同的条件下，混养小规格点带石斑鱼的凡纳滨对虾成活率比混养大规格点带石斑鱼提高15.1%~23.2%，平均产量比混养大规格点带石斑鱼提高19.0%~40.6%。随着点带石斑鱼混养密度增加，凡纳滨对虾成活率和平均产量呈下降趋势。小规格点带石斑鱼混养密度分别为0.4•尾 m-2时，凡纳滨对虾成活率和平均产量最高，分别为66.25%%±7.24%、（1181.0±101.8）kg，较单一养殖凡纳滨对虾成活率提高5.46%，平均产量提高16.2%；大规格点带石斑鱼混养密度为0.2尾•m-2时，凡纳滨对虾成活率和平均产量最高，分别为（52.04±6.11）%、（959.8±89.1）kg，但较单一养殖凡纳滨对虾成活率下降8.75%，平均产量下降5.88%%Experiment on polyculture of Litopenaeus vannamei with Epinephelus malabaricus has been conducted for 90 days so as to study the influence of polyculture density and size of Epinephelus malabaricus on the growth, survival rate and yield of Litopenaeus vannamei. The results show that polyculture density and size of Epinephelus malabaricus have great effect on the growth, survival rate and yield of Litopenaeus vannamei (P < 0.05). The yield and survival rate of Litopenaeus vannamei which are cultivated with Epinephelus malabaricus on a small scale are higher than the yield and survival rate of Litopenaeus vannamei cultivated with Epinephelus malabaricus on a large scale by 15.1% - 23.2% and 19.0% - 40.6% under the same polyculture density. The yield and survival rate of Litopenaeus vannamei have reduced with the increase of polyculture density of Epinephelus malabaricus. When the polyculture density of Epinephelus malabaricus on small scales is 0.4 ind·m-2, the survival rate and yield of Litopenaeus vannamei are 66.25%±7.24% and (1181.0±101.8) kg, which are higher than those of monoculture of Litopenaeus vannamei by 5.46% and 16.2%. While the polyculture density of Epinephelus malabaricus on large scales is 0.2 ind·m-2, the survival rate and yield of Litopenaeus vannamei are 52.04%±6.11% and (959.8±89.1) kg, which are lower than those of monoculture of Litopenaeus vannamei by 8.75%and 5.88%.
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