Depth integrated abundance of plankton and fish, expressed as Nautical Area Scattering Coefficient (NASC) determined from acoustics measurements at 38 kHz during R/V Håkon Mosby cruise IMR-2009615 on Transect 2009-06-14T20:34

The objective of the IMR-2009615 cruise was to study the distribution of fish and plankton in relation to the occurrence of Lophelia cold-water coral reefs and the general topography in the Traena Deep coral reef field. The acoustic data were collected using the Simrad ER60 scientific echosounder at a cruising speed of 10 knots. Abundance estimations of fish were generated for the 38 kHz data. Three other operating frequencies were used during the survey (18, 120 and 200 kHz) for trace recognition purposes. Echograms were scrutinized using Large Scale Survey System-software. The allocation of area backscattering strengths to species was made by comparison of the appearance of the echo recordings to trawl catches and video recordings. This dataset contains depth integrated values from four hundred and sixteen (416) vertical profiles of plankton and fish abundance expressed as Nautical Area Scattering Coefficient (NASC) determined from acoustics measurements at 38 kHz. […]IMR-2009615航次的研究目标为探究特罗纳深海珊瑚礁区（Traena Deep coral reef field）内鱼类与浮游生物的分布特征，及其与石珊瑚（Lophelia）冷水珊瑚礁分布及区域整体地形的关联。研究采用Simrad ER60科学回声测深仪采集声学数据，采集时航速设定为10节。针对38 kHz频段的声学数据，完成了鱼类丰度估算。本次调查同步使用18、120、200 kHz三个额外工作频段，用于声学信号轨迹识别。研究人员借助大型调查系统（Large Scale Survey System）软件对回声图进行解析。通过比对回声记录的特征与拖网捕捞样本及视频记录，完成了区域后向散射强度的物种归属分配。本数据集包含基于38 kHz声学测量所得的416条垂直剖面的浮游生物与鱼类丰度深度积分值，以海域面积散射系数（Nautical Area Scattering Coefficient, NASC）表示。[...]