Target-strength, length, and tilt-angle measurements of Pacific saury (Cololabis saira) and Japanese anchovy (Engraulis japonicus) using an acoustic-optical system
Target-strength, length, and tilt-angle measurements of Pacific saury (Cololabis saira) and Japanese anchovy (Engraulis japonicus) using an acoustic-optical system
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DOI：
10.1093/icesjms/fsp079
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发表时间：
2009-07
影响因子：
3.3
通讯作者：
K. Sawada;Hideyuki Takahashi;K. Abe;T. Ichii;Kazutoshi Watanabe;Y. Takao
中科院分区：
文献类型：
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作者：
K. Sawada;Hideyuki Takahashi;K. Abe;T. Ichii;Kazutoshi Watanabe;Y. Takao
萨瓦达，K.，高桥，H.，Abe，K.，Ichii，T.，Watanabe，K.，和Takao，Y. 2009.利用声光系统对秋刀鱼和鳀鱼的目标强度、长度和倾斜角进行了测量。- 海洋科学杂志，66：1212- 1218.太平洋秋刀鱼和日本鱼通常聚集在密集的群体或学校。一个声光系统（日本定量回声仪和立体视频摄像系统或J-QUEST）已被开发出来，以准确地测量密集的鱼群中的目标强度（TS）。J-QUEST包括一个定量的70 kHz分束回声测深仪和一个立体摄像机。它是部署从一艘研究船收集伴随措施的TS和立体图像的原位太平洋秋刀鱼和日本。立体摄像机提供鱼的长度（L）和倾斜角度的估计J-探索运动校正。以这种方式，TS与log（L）的经验模型推导出的太平洋秋刀鱼和日本，并与理论进行比较。
Sawada, K., Takahashi, H., Abe, K., Ichii, T., Watanabe, K., and Takao, Y. 2009. Target-strength, length, and tilt-angle measurements of Pacific saury (Cololabis saira) and Japanese anchovy (Engraulis japonicus) using an acoustic-optical system. - ICES Journal of Marine Science, 66: 1212-1218.Pacific saury and Japanese anchovy generally congregate in dense groups or schools. An acoustic-optical system (the Japanese Quantitative Echosounder and Stereo-video Camera System or J-QUEST) has been developed to measure accurately the target strength (TS) of fish in a dense school. J-QUEST comprises a quantitative, 70 kHz, split-beam echosounder and a stereo-video camera. It was deployed from a research vessel to collect concomitant measures of TS and stereo images of in situ Pacific saury and Japanese anchovy. The stereo-video camera provides estimates of the fish lengths (L) and tilt-angles corrected for J-QUEST motion. In this way, empirical models of TS vs. log(L) were derived for Pacific saury and Japanese anchovy and compared with theory.