Movement tracing and analysis of benthic sting ray (Dasyatis akajei) and electric ray (Narke japonica) toward seabed exploration
Movement tracing and analysis of benthic sting ray (Dasyatis akajei) and electric ray (Narke japonica) toward seabed exploration
复制标题
底栖刺魟 (Dasyatis akajei) 和电鳐 (Narke japonica) 海底勘探的运动追踪和分析
DOI：
10.1007/s42452-020-03967-6
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发表时间：
2020
影响因子：
2.6
通讯作者：
Yo Tanaka
中科院分区：
文献类型：
--
作者：
Shun-ichi Funano;Nobuyuki Tanaka;Satoshi Amaya;Akira Hamano;Toyoki Sasakura;Yo Tanaka
绘制海底地图对于船舶安全航行、商业捕鱼和保护海洋矿产资源等各种活动来说是一项重要任务。传统上，包括自主水下航行器或声纳系统的搜索机器已被用于此目的。在这里，我们提出了一种完全不同的方法来改善海底地图，使用底栖（刺和电）射线作为代理人，可以通过其自主行为探索海底，而无需精确控制，并可能添加额外的信息，如生物区系。实现这一概念的第一步，必须分析底栖射线的详细行为。在这项研究中，我们使用了一个大水槽（10 m × 5 m × 6 m高）的系统来测量底栖射线的运动模式。我们证实，这是可行的，光学跟踪的2D和3D运动的刺和电射线和射线的速度表明，他们是否掠过缓慢的底部表面或游泳。然后，我们研究了测量海底特征的可行性，使用两个电射线配备了小型脉冲发射器（声波发射器）和接收器在船上。我们确认跟踪的运动的射线在海底超过90分钟，在1秒的时间分辨率。由于我们可以从速度知道光线是缓慢地掠过海底表面还是在水中游泳，这将适用于绘制海底深度。这是研究利用底栖生物绘制海底地图可行性的第一步。
Creation of a seabed map is a significant task for various activities including safe navigation of vessels, commercial fishing and securing sea-mined resources. Conventionally, search machines including autonomous underwater vehicles or sonar systems have been used for this purpose. Here, we propose a completely different approach to improve the seabed map by using benthic (sting and electric) rays as agents which may explore the seabed by their autonomous behavior without precise control and possibly add extra information such as biota. For the first step to realize this concept, the detail behavior of the benthic rays must be analyzed. In this study, we used a system with a large water tank (10 m × 5 m × 6 m height) to measure the movement patterns of the benthic rays. We confirmed that it was feasible to optically trace the 2D and 3D movement of a sting and an electric ray and that the speed of the rays indicated whether they were skimming slowly over the bottom surface or swimming. Then, we investigated feasibility for measuring the sea bottom features using two electric rays equipped with small pingers (acoustic transmitters) and receivers on a boat. We confirmed tracing of the movements of the rays over the sea bottom for more than 90 min at 1 s time resolution. Since we can know whether rays are skimming slowly over the bottom surface or swimming in water from the speed, this would be applicable to mapping the sea bottom depth. This is the first step to investigate the feasibility of mapping the seabed using a benthic creature.