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首页> 外文期刊>ICES Journal of Marine Science >Combining multibeanvsonar and multifrequency-echosounder data: examples of the analysis and imaging of large euphausiid schools
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Combining multibeanvsonar and multifrequency-echosounder data: examples of the analysis and imaging of large euphausiid schools

机译：结合多声声和多频回声测深仪数据：大型euphausiid学校的分析和成像示例

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The first high-resolution, quantitative, multibeam sonar (Simrad MS70) ever developed was mounted in a keel of RV "G. O. Sars" with port-orientated beams. Each ping samples a volume of 60° horizontally x 45° vertically with 500 beams, which is often enough to insonify a complete school of fish or zooplankton. The large amount of resulting data is efficiently preprocessed with automatic, real-time detections of school candidates; these are accepted or rejected during post-processing. The system was used on the continental shelf near the Subantarctic island of South Georgia to study Antarctic krill (Euphausia superba), and some of the detected schools were immediately sampled with a six-frequency echosounder (Simrad EK60), then trawled with various nets to verify the target species and their size composition. For schools acoustically categorized as euphausiids, data from the two acoustic systems were used to estimate the school morphometrics and the krill size distributions. The principal objectives of this study were to explore the potential of combining data from a multibeam sonar, multifrequency echosounders, and nets, and to describe the efficient processing methods and software that facilitate the multi-instrument analyses. Three-dimensional morphometrics based on the MS70 data were consistent with corresponding two-dimensional morphometrics based on the echosounder data and could be used to improve the acoustic classifications of taxa or species. Additionally, automatic preprocessing and integration of data from different sources into the same user interface allowed efficient exploration and interpretation of all the acoustic data.
机译：有史以来第一款高分辨率，定量，多光束声纳（Simrad MS70）被安装在带有端口定向波束的RV“ G。O. Sars”龙骨中。每个ping用500束水样对水平60°x垂直45°的体积进行采样，通常足以使完整的鱼群或浮游动物发出共鸣。通过自动，实时检测学校候选人，可以有效地预处理大量结果数据；这些在后期处理期间被接受或拒绝。该系统被用于南乔治亚州亚南极岛屿附近的大陆架上，研究南极磷虾（Euphausia superba），并立即用六频回声测深仪（Simrad EK60）对一些检测到的学校进行采样，然后用各种网子拖网至验证目标物种及其大小组成。对于在声学上被分类为euphausiids的学校，使用来自两个声学系统的数据来估计学校的形态计量学和磷虾尺寸分布。这项研究的主要目的是探索将多束声纳，多频回声测深仪和网络中的数据进行合并的潜力，并描述有助于进行多仪器分析的有效处理方法和软件。基于MS70数据的三维形态计量学与基于echosounder数据的相应二维形态计量学相一致，可用于改善分类群或物种的声学分类。此外，自动预处理和将来自不同来源的数据集成到同一用户界面中，可以有效地探索和解释所有声学数据。

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