研究对虾可持续游泳能力对工厂化循环水养殖系统中水流流速和持续时间调控具有重要意义。本研究利用循环水槽，分别测定3种规格[S1 (5.87±0.53)、S2 (10.12±0.62)、S3 (14.28±0.12) g]的凡纳滨对虾（Litopenaeus vannamei）在6种流速（29.4、32.9、37.5、41.2、44.3 和50.3 cm/s）下的可持续游泳时间，并以此作为指标衡量凡纳滨对虾的可持续游泳能力。结果显示：随着流速的增加，所有规格的对虾可持续游泳时间都呈现降低趋势，降幅随着规格的增大而增大。相同流速下，对虾规格越大，可持续游泳时间越小，且具有明显的个体差异性；采用离散系数表征个体差异性大小，3种不同规格的对虾，离散系数随水流的增大，整体呈上升趋势，其中大规格对虾S3组个体差异性明显大于其余规格对虾；对虾规格对平均可持续游泳时间-流速数学拟合模型的选取基本没有影响，3种规格对虾的对数模型拟合系数均为最高。研究结果可以为工厂化循环水养殖模式下不同规格对虾养殖池内水流流速的调控提供参考依据。

 The study on swimming ability of shrimp is of great significance to the regulation of flow velocity and duration in the industrial recirculating aquaculture system. In this study, the swimming time of 3 sizes [S1 (5.87 ± 0.53), S2 (10.12 ± 0.62) and S3 (14.28 ± 0.12) g] of Litopenaeus vannamei was measured in circulating flume at 6 kinds of flow velocity (29.4, 32.9, 37.5, 41.2, 44.3 and 50.3 cm/s), and taken as the index to measure the swimming ability of Litopenaeus vannamei. The results showed that with the increase of flow velocity, the swimming time of all sizes of shrimp showed a decreasing trend, and the decrement increased with the increase of the size. Under the same flow velocity, the larger the shrimp size, the shorter the swimming time, with obvious individual variation; the coefficient of variation was used to characterize the individual variation. The coefficient of variation showed an overall upward trend with the increase of flow velocity for all the 3 sizes of shrimp. Among them, the individual variation of shrimp of S3 was obviously greater than that of shrimp of other sizes; the shrimp size basically has no effect on the selection of the mathematical fitting model of average swimming time - flow velocity, and the logarithmic model fitting coefficient of the three sizes of shrimp is the highest. The results can provide a reference for the regulation of flow velocity for shrimps of variable sizes in industrial recirculating aquaculture system.