Experimental study for construction of underwater image information sampling system by animal- born image data logger

动物出生图像数据记录器和加速度数据记录器是研究海洋动物行为与环境相互作用的有用工具，已被广泛用于潜水动物，特别是海豹和企鹅的研究。然而，由于部署的技术困难和数据记录器的恢复，图像数据记录器很少用于鱼类，而更多地用于海豹和企鹅。为了寻求部署和回收的技术方案，我们开发了一种新的鱼研究部署和回收系统。首先利用最新设计的单片机控制定时器对投放系统进行了小型化改造，然后设计了一种新型的单平台投放系统，该投放系统由定时器、记录仪、声波脉冲发生器和无线电发射机组成，具有一定的浮力。我们使用新设计的释放系统在下田湾地区对两条鲨鱼和一条鱼进行了测试实验。在海面平坦的情况下，系统运行良好。我们还开发了一种新的深海鱼类在深水中的部署和回收系统，而不需要在水面处理它们。我们在养鱼圈中对其进行了测试，发现系统运行良好。

Animal-born image data logger and acceleration data logger are useful tools to investigate the interaction between marine animal behavior and their environment, and those have been commonly used for the study of diving animals, particularly seals and penguins. However image data loggers have been rarely used for fishes due to technical difficulty of deployment and the recovery of data loggers, while used in seals and penguins more often. In order to search for the technical solution of deployment and recovery we developed a new deployment and recovery system for fish study. First we conducted is further miniaturization of releasing system with a newly designed microchip controlled timer and then we designed a new single platform releasing system compounded with timer, logger, acoustic pinger and radio transmitter, which is slightly buoyant. We conducted the test experiment in the Shimoda Bay area using the newly designed releasing system on two sharks and one ray. System worked well when sea surface condition was smooth. We also developed a new deployment and recovery system on the deep-sea fishes in deep water without handling them at surface. We tested it in the fish culture pen and found system worked fine.