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Using Three Acoustic Technologies on Underwater Gliders to Survey Fish

机译：在水下滑翔机上使用三种声学技术测量鱼

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Autonomous platforms and vehicles are a growing component of the ocean research fleet, producing data sets crucial to our understanding of oceanographic and fishery ecosystem processes. One emerging tool for making these measurements is underwater gliders that autonomously sample the water column for weeks to months at a time. Although originally designed to measure temperature and salinity, underwater gliders can now support a myriad of sensors. For the demonstration project described within, three complementary acoustic technologies were integrated into an underwater glider for mapping fish on the continental shelf: an acoustic telemetry receiver, a passive acoustic monitoring recorder, and a fisheries echosounder.The demonstration project was designed to evaluate the effectiveness of each sensing technology. Sixty-one fish were implanted with acoustic tags near the Gulfstream Natural Gas pipeline in the eastern Gulf of Mexico in advance of planned underwater glider missions. The glider was deployed four times over 12 months, with all three acoustic technologies to traverse the pipeline and surrounding habitat. Glider detections were compared to detections of fish at moored acoustic tag telemetry receivers and passive acoustic recorders co-located at the tagged fish locations. All three technologies identified fish along the targeted hard-bottom pipeline habitat, as well as previously uncharted areas of hard-bottom reef. The results of this study demonstrate the utility of gliders integrated with acoustic sensors as a potential tool to identify areas that merit deeper investigation to assess fish stocks.
机译：自主平台和运载工具是海洋研究船队中不断增长的组成部分，其产生的数据集对于我们对海洋学和渔业生态系统过程的理解至关重要。进行这些测量的一种新兴工具是水下滑翔机，可以一次连续数周至数月地对水柱进行自动采样。尽管最初设计用于测量温度和盐度，但水下滑翔机现在可以支持多种传感器。对于其中描述的演示项目，将三种互补的声学技术集成到了用于在大陆架上绘制鱼类的水下滑翔机中：声学遥测接收器，无源声学监测记录仪和渔业回声测深仪。该演示项目旨在评估有效性每种传感技术。在计划进行的水下滑翔机任务之前，在墨西哥湾东部的湾流天然气管道附近向六十一条鱼植入了声学标签。滑翔机在12个月内部署了四次，所有三种声学技术都可以穿越管道和周围的栖息地。将滑翔机检测与停泊在标记鱼位置处的系泊声标签遥测接收机和无源声记录仪的鱼类检测进行了比较。所有这三种技术都可以在目标硬底管道栖息地以及以前未知的硬底礁区域识别鱼类。这项研究的结果表明，与声音传感器集成的滑翔机是一种潜在工具，可用于确定需要更深入调查以评估鱼类种群的区域。

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