Study on behavior of aquatic animals using visual telemetry

视觉数据存储标签安装了互补金属氧化物硅电荷耦合器件（CMOS CCD），可以拍摄100张28000像素的黑白照片，并将其存储在1兆字节的闪存中。标签尺寸为92 x 40 x 28 mm^3，在空气中重约200克，在水中重约18克。它有一个IrDA接口，可以将图片传输到个人电脑上。原型机可以承受100米的压力，并定时控制每一小时拍摄一张照片。磁场传感器加速度计由一个磁阻效应（MR）传感器和三个加速度计组成。磁流变传感器检测三维磁场并将其转换为三维方向数据。磁流变传感器和加速度计的所有信号通过A/D转换器转换为12位数字数据，由标签内的微处理器控制。尺寸为54毫米0 × 178毫米，空气中含钙1500克，水中含钙100克。我们在泰国对这些贴在海龟身上的标签进行了首次实地测试。我们的最终目标是开发适用于鱼类跟踪的新型标签。然而，标签的原型太大了，不能贴在鱼身上。因此，我们在泰国政府渔业部海龟保护站对成年海龟进行了标签的现场测试。该站位于泰国湾的曼奈岛，向东约200公里，远离曼谷。该站成立于1972年，是泰国湾海龟研究中心。利用ccd -摄像机系统对头巾壳和鲍鱼的行为进行了观察。

The visual data storage tag was installed with a complementary metal-oxide-silicon charge-coupled device (CMOS CCD) that took 100 black-and-white pictures with 28000 pixels and stored them in a 1 mega-byte flush memory. The dimension of the tag is 92 x 40 x 28 mm^3, weighed ca. 200g in air and ca. 18g in water. It has an IrDA interface to transfer pictures to a personal computer. A prototype model has capacity to 100 m pressure and was timer-controlled to take pictures every one-hour. The magnetic field sensor accelerometer has a magneto-resistive effect (MR) sensor and three accelerometers in it. The MR sensor detects 3D magnetic field to transform into 3D direction data. All the signals of the MR sensors and the accelerometers were converted by A/D converter to 12-bit digital data controlled by a microprocessor inside the tag. The dimension is 54 mm 0 x 178 mm with ca.1500g in the air and ca. lOOOg in water. We conducted the first field tests of these tags attached to sea turtles in Thailand.Our final goal is to develop new tag types applicable to fish tracking. However, the prototypes of the tags were too large to be attached on fish. Therefore, we conducted the field test of the tags using adult sea turtles in the Sea Turtle Conservation Station belonging to the Department of Fisheries of Thai government. The Station was located at the Mannai Island in the Gulf of Thailand about 200 km eastward far from Bangkok. The station was founded in 1972 and was the center for the sea turtle research in the Gulf of Thailand.We also conducted to observe behaviors of turban shells and abalones using CCD-video camera system.