US-GLOBEC: Broad-Scale Acoustic Measurements of Zooplankton and Nekton in the Georges Bank Region

9313675 Wiebe作为美国GLOBEC西北大西洋/乔治斯银行研究的一部分，Wiebe博士和他的合作者将使用一个向下拖曳的高频声学系统(操作频率分别为120千赫、420千赫和720千赫)来确定乔治斯海岸浮游动物和尼克顿种群的广泛声学分布。拖曳系统将被部署在乔治浅滩地区的月度调查中，以涵盖盖迪伊浮游生物中上层阶段的持续时间。这些数据将被分析，以估计大型浮游动物、微型浮游动物和更大的声音散射体的空间斑块、相对丰度和大小分布。声学数据将与MOCNESS网络收集产生的大小、频率和分类组成数据进行比较。这些数据将作为声学散射模型的输入，用于准确描述没有收集直接生物数据的回声探测仪数据。对动物密度和大小的声学估计，当结合水文(主要是温度)、生理和猎物密度数据时，可以用来探索目标物种增长率的空间显式模型。

9313675 Wiebe As part of the U.S. GLOBEC NW Atlantic/Georges Bank study, Dr. Wiebe and collaborators will determine the broad-scale acoustical distribution of zooplankton and nekton populations on Georges Bank using a towed down-looking high frequently acoustical system (operating at 120, 420 and 720 kHz). The towed system will be deployed on the monthly surveys of the Georges Bank region designed to cover the duration of the pelagic stages of the gadid ichyoplankton. The data will be analyzed to yield estimates of spatial patchiness, relative abundance, and size distribution of macrozooplankton, micronekton, and larger sound scatters. The acoustical data will be compared with size frequency and taxonomic composition data generated from MOCNESS net collections. The data will be used as input into acoustic scattering models for accurate descriptions of echosounder data where direct biological data are not collected. Acoustical estimates on animal density and size, when combined with the hydrographic (temperature primarily), physiological, and prey density data can be used to explore spatially-explicit models of target species growth rates.