Cetaceans and seabirds along the Indian Ocean 110°E meridian (Second International Indian Ocean Expedition (IIOE-2) expedition) RV Investigator voyage IN2019_V03 (2019)

The aim of this study, as part of a large number of related studies, was to examine the occurrence of cetaceans and seabirds along the 110◦E meridian from temperate to tropical waters (39.5–11.5◦S). Cetaceans and seabirds were actively scanned for across a four-week period spanning austral autumn to winter. Acoustic recordings of vocalising cetaceans weremade using directional and omnidirectional sonobuoys (n = 87 deployments). In total, seven cetacean sightings (six baleen whale, one toothed whale), 186 seabird sightings and 225 cetacean acoustic detections were recorded.

A total of 22 seabird species were sighted, including, petrels, albatrosses, tropicbirds, terns, shearwaters, boobies, frigatebirds, gannets, gulls, skuas and prions.
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/survey_details.cfm?survey=IN2019_V03. 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.

本研究作为一系列相关研究的组成部分，旨在考察沿110°E经线从温带至热带水域（南纬39.5°至11.5°）的鲸类（cetaceans）与海鸟的出现情况。研究团队在横跨南半球秋季至冬季的四周周期内，主动开展鲸类与海鸟的扫描观测。发声鲸类的声学记录通过定向与全向声呐浮标（sonobuoy）完成，共计部署87次。本次研究总计记录到7次鲸类目击事件（6次须鲸类、1次齿鲸类）、186次海鸟目击事件，以及225次鲸类声学检测结果。

本次观测共记录到22种海鸟，涵盖海燕、信天翁、热带海鸟、燕鸥、剪水鹱、鲣鸟、军舰鸟、塘鹅、海鸥、贼鸥与锯鹱。

本研究的航行详情（包括元数据、研究项目、其他在线或可下载数据集、已发表文献与报告、相关事件、地图等）可通过以下链接获取：https://www.marine.csiro.au/data/trawler/survey_details.cfm?survey=IN2019_V03。若将本数据集用于任何成果产出，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）开展相关科研工作。