Visual sightings of krill swarms at the sea surface from the Aurora Australis during the BROKE-West voyage, 2005-2006

A collection of data files detailing visual sightings of krill swarms on the sea surface from the Aurora Australis during the BROKE-West voyage, 2005-2006.

These data were additional data collected by whale observers. See the record, "BROKE-West_Cetaceans" for full details on the process of collecting whale observations. In summary though, observers were present from the time the vessel departed Fremantle until it approached Hobart. Observers worked whenever light, weather and sea conditions permitted. Generally between two and five observers were working at any given time (see the above cetaceans metadata record for more information).

The download file contains:
- GIS shapefiles showing the locations of the recorded swarms on the ship's track.
- A csv and Excel file of the recorded observations.
- Several map images showing the ship's track and the observed swarms.

The BROKE-West survey was conducted on voyage 3 of the Aurora Australis during the 2005-3006 season. It was intended to be a comprehensive biological and oceanographic survey of the region between 30 degrees and 80 degrees east.

本数据集收录了2005-2006年BROKE-West科考航次期间，“极光号”（Aurora Australis）科考船观测到的海面磷虾群目视记录数据文件。

该批数据由鲸类观测员额外采集。如需了解鲸类观测的完整采集流程，请查阅记录文件“BROKE-West_Cetaceans”。简而言之，观测员的值守时段为船舶从弗里曼特尔（Fremantle）离港直至驶近霍巴特（Hobart）的全程；观测工作仅在光线、气象与海况条件允许时开展，任意时段通常有2至5名观测员在岗作业（更多细节可参见前述鲸类观测元数据记录）。

本次提供的下载归档包含以下内容：
- 用于标注船舶航行轨迹上记录的磷虾群位置的GIS形状文件（GIS shapefiles）；
- 存储观测记录的CSV文件与Excel文件；
- 多张展示船舶航行轨迹与观测到的磷虾群分布的地图影像。

BROKE-West科考航次为“极光号”2005-2006航季的第3次科考航次，旨在对东经30°至80°覆盖海域开展系统性的生物与海洋学综合调查。