IMOS - Ships of Opportunity – Bioacoustics - Data from Sealord F.V. Janas in the Tasman Sea from the 9th of June 2011 to the 14th 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).Departed: New Zealand, June 9, 2011Arrived:     Hobart, Australia, June 14, 2011Bio acoustic signals allow understanding how mid-water prey species (known collectively as micronekton) such as small fish, squid, krill and jellyfish are distributed. Mid-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. Acoustic 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，依托澳大利亚海洋综合观测系统（Integrated Marine Observing System, IMOS）的机遇船舶（Ship of Opportunity, SOOP）生物声学（Bio Acoustic, BA）项目，由西洛德号捕捞渔船（Fishing Vessel, F.V. Janas）执行，该平台的IMOS代码为ZMTW。启航地：新西兰，2011年6月9日；抵达地：澳大利亚霍巴特，2011年6月14日。

生物声学信号可用于解析中小型鱼类、头足类、磷虾及水母等中层猎物物种（统称为微自游生物（micronekton））的分布格局。中层猎物物种构成海洋食物网的核心环节，可将能量从海洋表层的初级生产者传递至金枪鱼、旗鱼、鲨鱼、海豹与海鸟等顶级捕食者。

微自游生物的生物量与分布状况，可反映海洋生态系统的大尺度结构与功能格局，以及海洋生态系统的动态变化。本数据集的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舶完成，该设备可记录深度达1500米的声学背散射切片数据。