Vertical profiles of plankton and fish abundance expressed as Nautical Area Scattering Coefficient determined from acoustics measurements at 38 kHz, R/V H. Mosby cruise IMR-2009615, Transect 2009-06-15T08:23 A@en

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 three hundred and sixty (360) vertical profiles of plankton and fish abundance expressed as Nautical Area Scattering Coefficient (NASC) determined from acoustics measurements at 38 kHz. […]本航次编号为IMR-2009615，其研究目标为在特罗娜深海珊瑚礁区（Traena Deep coral reef field），探究鱼类与浮游生物的分布与卢氏冷水珊瑚礁（Lophelia cold-water coral reefs）的发育状况以及区域地形之间的关联。本航次以10节的航速，使用西姆拉德（Simrad）ER60科学回声测深仪采集声学数据。研究人员基于38 kHz频段的声学数据完成了鱼类丰度估算，本次调查同时启用18 kHz、120 kHz与200 kHz三个额外工作频段，用于声迹识别。研究人员借助大规模测量系统软件（Large Scale Survey System-software）对回声图进行检视分析。通过将回声记录的特征与拖网捕捞样品及视频影像进行比对，完成了区域背散射强度的物种归属分配。本数据集包含360份垂直剖面数据，记录了以38 kHz声学测量所得的航海面积散射系数（Nautical Area Scattering Coefficient，简称NASC）表征的浮游生物与鱼类丰度。[…]