Optimum design for an offshore aquaculture facility for Pacific bluefintuna on the basis of its behavioral aspects

本研究在考虑太平洋蓝鳍金枪鱼（PBT）行为的基础上，试图从力学和生物学两方面为其近海养殖设施的优化设计奠定基础。我们使用了一个由我们开发的网格几何的数值模拟系统来评估净变形和对设施的载荷。仿真结果表明，当速度为1 kt时，网箱在电流作用下发生变形，体积减小到原来的50%。利用生物遥测系统获得的观测数据表明，强电流使网箱发生爆炸，导致网箱与养殖金枪鱼发生碰撞。此外，冷水团对PBT的垂直游动具有很强的约束作用。

In the present study, we tried to create the basis for an optimum design for an offshore aquaculture facility for Pacific bluefin tuna (PBT) from not only mechanical aspects but also biological ones after considering the behavior of PBT. We used a numerical simulation system of the netting geometry developed by us to evaluate net deformation and the loads to the facility. The simulation results showed that the net cage was deformed and reduced to 50% of the original volume by current flow when the speed was 1 kt. The observation data obtained using a bio-telemetry system showed that the strong current blew up the net cage and caused a collision between the netting and the cultured tuna. In addition, the cold water mass acted as a strong constraint factor on the vertical swimming of PBT.