Long-term changes in the Chagos pygmy blue whale song at Diego Garcia Island

Full description

This dataset is the result of an analysis of Chagos pygmy blue whale songs, recorded on hydrophones moored south of Diego Garcia Island in the central Indian Ocean. The hydrophones are part of the International Monitoring Network (IMS) operated by The Preparatory Commission for the Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO). The measured quantities are the frequency, pulse rate, and power spectral distribution of subunits 1 and 2 of the first unit of the song. Also included in this dataset are the results of statistical trend fitting analyses, and the results of methodological validation tests including the Monte Carlo trial results on synthetic data. Raw data are provided as MATLAB '.mat' files, with select data products also provided as '.csv' and image files. The original audio data are not provided in this dataset and remain the property of the CTBTO. The CTBTO-IMS H08S audio dataset was obtained by T.L.R. and B.A.J. under a vDEC contract between the Preparatory Commission for the Comprehensive Nuclear-Test-Ban Treaty Organization and UNSW Sydney. The Provisional Technical Secretariat (PTS) of the Preparatory Commission gave access to the IMS data and is not responsible for the views of the authors. The authors thank the CTBTO for making their data available.