IMOS BA SOOP - Bio Acoustic Data from Sealord F.V. Janas in the Tasman Sea from the 24th of June 2011 to the 28th of June 2011.

This Bio Acoustic data was collected in June 2011 under the IMOS Ship of Opportunity (SOOP) Bio Acoustic (BA) program on Sealord F.V. Janas (IMOS platform code: ZMTW).\n\nDeparted: Hobart, Australia, June 24, 2011\nArrived: \tNew Zealand, June 28, 2011\n\nBio acoustic signals allow understanding how mid-water prey species (known collectively as micronekton) such as small fish, squid, krill and jellyfish are distributed. \n\nMid-water prey form the core of the ocean food web, transferring energy from primary producers at the ocean surface to top predators such as tunas, billfish, sharks, seals and seabirds.The mass and distribution of micronekton reflects broad-scale patterns in the structure and function of the ocean, as well as the dynamics of marine ecosystems. \n\nAcoustic mapping is done from fishing and scientific vessels that are equipped with scientifically-calibrated 38 kHz digital echo-sounders that record a slice of acoustic backscatter to a depth of 1500 meters.

本生物声学数据集采集于2011年6月，依托海洋综合观测系统（Integrated Marine Observing System, 简称IMOS）的机会船（Ship of Opportunity, 简称SOOP）生物声学（Bio Acoustic, 简称BA）计划，在西洛德（Sealord）公司的F.V. Janas号渔船上完成采集，该平台的IMOS代码为ZMTW。

起航：澳大利亚霍巴特，2011年6月24日
抵达：新西兰，2011年6月28日

生物声学信号可用于解析中层水域猎物类群（统称为微型游泳生物（micronekton））的分布格局，这类类群包括小型鱼类、头足类、磷虾以及水母等。

中层水域猎物是海洋食物网的核心组成部分，可将能量从海洋表层的初级生产者传递至顶级捕食类群，例如金枪鱼、旗鱼、鲨鱼、海豹以及海鸟等。

微型游泳生物的生物量与分布格局，能够反映海洋生态系统结构与功能的宏观模式，同时也可体现海洋生态系统的动态变化。

本次声学测绘工作由配备经过科学校准的38 kHz数字回声测深仪的捕捞及科研船只完成，该设备可记录1500米深度范围内的声学背散射信号切片。