RV Investigator Voyage IN2016_V01 Seabird Observations, Australia (2016)

Seabird and incidental cetacean and seal sightings were recorded during daylight hours during the entire voyage. During the voyage, there was 2,581 transect counts of seabirds of 61 species. Coverage was good over the area around Heard and McDonald islands, with some coverage also of Gunnari Ridge. Also covered some deeper parts of the Central Kerguelen Plateau. There were 31 sightings of sea mammals away from the immediate vicinity of Heard and McDonald islands (fur seals were sufficiently common in waters around Heard and McDonald Island to be treated using the same method as for seabirds). Sightings included five species of whales and three species of dolphins. The most intriguing series of sightings comprised seven sightings (approximately eight animals) of blue whales over Gunnari Ridge on 9/10 February (another sighting on 21 January may have been in the same area, as it was approximately 1 north and 1 west of the February sightings). Each species has been linked where possible to the World Register of Marine Species (WoRMS https://www.marinespecies.org). Voyage details (metadata, projects, other datasets either online or as downloads, publications and reports, events, maps etc) can be accessed at https://www.marine.csiro.au/data/trawler/surveydetails.cfm?survey=IN2016V01 If this data has been used in any products, please acknowledge with the following: We acknowledge the use of the CSIRO Marine National Facility (https://ror.org/01mae9353) in undertaking this research.

本航次全程于日间记录了海鸟、偶然目击的鲸类及鳍足类动物的目击数据。本次航次共计完成2581条海鸟样线计数，涉及61个物种。调查覆盖情况良好的区域为赫德岛与麦克唐纳群岛周边海域，同时也覆盖了冈纳海岭部分区域，以及克尔格伦中央高原的部分深水区。在赫德岛与麦克唐纳群岛周边海域之外，共记录到31次海洋哺乳动物目击事件；其中海狗在该群岛周边海域分布极为常见，故采用与海鸟一致的调查方法进行统计。本次记录的海洋哺乳动物包含5种鲸类与3种海豚类。其中最受关注的目击序列为：2月9日至10日在冈纳海岭海域记录到7次蓝鲸目击事件，涉及约8头个体；1月21日另有一次疑似发生在同一区域的目击记录，其位置较2月的目击点偏北约1经度、偏西约1经度。所有物种均尽可能关联至世界海洋物种登记册（World Register of Marine Species, WoRMS，https://www.marinespecies.org）。本航次的详细信息（包括元数据、研究项目、可在线获取或下载的其他数据集、相关出版物与报告、航次事件、地图等）可通过以下链接获取：https://www.marine.csiro.au/data/trawler/surveydetails.cfm?survey=IN2016V01。若将本数据集用于相关成果产出，请按以下方式致谢：本研究使用了澳大利亚联邦科学与工业研究组织（CSIRO）海洋国家设施（https://ror.org/01mae9353）提供的支持。