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仪和加速度数据记录仪是研究海洋动物行为与其环境之间相互作用的有用工具，它们已被广泛用于研究潜水动物，特别是海豹和企鹅。然而，由于数据记录器的部署和回收技术上的困难，图像数据记录器很少用于鱼类，而用于海豹和企鹅的频率更高。为了寻求鱼类研究的部署和回收技术解决方案，我们开发了一种新的鱼类研究部署和回收系统。首先采用新设计的微芯片控制定时器对释放系统进行了进一步的小型化，然后设计了一种由定时器、记录仪、声波发射器和无线电发射器组成的新型单平台释放系统，该系统具有微浮力。我们在下田湾地区使用新设计的放生系统对两条鲨鱼和一条鳐鱼进行了试验。当海面条件平稳时，系统运行良好。我们还开发了一种新的深海鱼类部署和回收系统，无需在水面处理它们。我们在养鱼池中进行了测试，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.