seanoe:46124 data@seanoe.org 2021-05-12 ISO 19115:2003/19139 1.0 Antarctic blue whales in the southern Indian Ocean: a multi-year and multi-site database of Z-call detections 2016-09 2021-05-12 Leroy Emmanuelle C., Royer Jean-Yves, Bonnel Julien, Samaran Flore (2016). Antarctic blue whales in the southern Indian Ocean: a multi-year and multi-site database of Z-call detections. SEANOE. https://doi.org/10.17882/46124 As part of the OHASISBIO project, since January 2010, a network of 6 to 8 autonomous hydrophones is deployed in the southern Indian Ocean (Fig. 1) to monitor the low-frequency sounds (0-120 Hz) carried by the ocean. These acoustic data provide unique information on the seasonal presence of several species and sub-species of large baleen whales. Among them, the Antarctic blue whale (Balaenoptera musculus intermedia) has a distinct call between 18 and 26 Hz, easily recognizable by its Z-shape in a time-frequency diagram. We designed an automatic Z-detector (Socheleau et al., 2015) to cense the Z-calls in our multi-year, multi-site acoustic dataset.  The resulting database consists of several metrics: time of detection of each individual call, the ambient noise level between 40 and 60 Hz, and the ratio between the whale chorus between 25 and 27 Hz over the noise level between 30 and 33 Hz. The rationale for these metrics and the interpretation of the results can be found in the paper by Leroy et al. (2016; see reference below). Figure 1: Acoustic records available for Antarctic blue whale Z-call detections. © E Leroy / CNRS-U.Brest LGO Figure 2: Acoustic records available for Antarctic blue whale Z-call detections. © E Leroy / CNRS-U.Brest LGO The authors wish to thank the Captains and crews of RV Marion Dufresne for the successful deployments and recoveries of the hydrophones of the OHASISBIO experiment and of ORV Sagar Kanya for the recovery of the RAMA hydrophone. French cruises were funded by the French Polar Institute (IPEV; cruises VT109/112-MD174/175, VT115-MD185, VT119-MD189, VT128-MD193, VT135-MD197, VT141-MD200 and VT146-MD201), with additional support from INSU-CNRS. We thank NOAA/PMEL and INCOIS for the opportunity to recover the RAMA hydrophone. The hydroacoustic stations were funded by INSU-CNRS and by Région Bretagne (CPER ODO 2007-2015). Leroy Emmanuelle C. CNRS & Université de Brest, Laboratoire Géosciences Océan, IUEM rue Dumont d’Urville, 29280 Plouzané Royer Jean-Yves CNRS & Université de Brest, Laboratoire Géosciences Océan, IUEM rue Dumont d’Urville, 29280 Plouzané Bonnel Julien ENSTA-Bretagne, Lab-STICC, 2 rue François Verny, 29806 Brest Cedex 9 Samaran Flore ENSTA-Bretagne, Lab-STICC, 2 rue François Verny, 29806 Brest Cedex 9 SEANOE https://www.seanoe.org/data/00350/46124/illustration.gif Acoustic records available for Antarctic blue whale Z-call detections Environment Marine turtles, birds, mammals ODATIS aggregation parameters and Essential Variable names 2025-07-29 geonetwork.thesaurus.external.theme.NVS.OD1 Environment SeaDataNet Parameter Disciplines 2025-07-29 geonetwork.thesaurus.external.parameter.NVS.P08 /Observational data/in-situ Type de jeux de donnée ODATIS 2025-12-09 geonetwork.thesaurus.local.theme.type_jeux_donnee CC-BY-NC (Creative Commons - Attribution, No commercial usage) Data are published without any warranty, express or implied. The user assumes all risk arising from his/her use of data. Data are intended to be research-quality and include estimates of data quality and accuracy, but it is possible that these estimates or the data themselves contain errors. It is the sole responsibility of the user to assess if the data are appropriate for his/her use, and to interpret the data, data quality, and data accuracy accordingly. Authors welcome users to ask questions and report problems. Seasonal and Diel Vocalization Patterns of Antarctic Blue Whale (Balaenoptera musculus intermedia) in the Southern Indian Ocean: A Multi-Year and Multi-Site Study 2016 Public Library Science LEROY EMMANUELLE C. SAMARAN FLORE BONNEL JULIEN ROYER JEAN-YVES 10.1371/journal.pone.0163587 Automated detection of Antarctic blue whale calls 2015 Acoustical Society of America (ASA) Socheleau Francois-Xavier Leroy Emmanuelle Carvallo Pecci Andres Samaran Flore Bonnel Julien Royer Jean-Yves 10.1121/1.4934271 Inter- and intra-annual frequency variations of large-whale calls in the southern Indian ocean 2017 SEANOE Leroy Emmanuelle C Royer Jean-Yves Bonnel Julien Samaran Flore 10.17882/51007 10.17600/6200130 10.18142/229 10.17600/9200100 10.17600/10200010 10.17600/11200020 10.17600/12200020 10.17600/13200100 10.17600/14002600 10.17600/15003100 10.17600/8200090 oceans 50.0 83.0 -46.0 -4.0 CSV https://www.seanoe.org/data/00350/46124/data/45826.zip WWW:DOWNLOAD-1.0-link--download Quality controlled data https://doi.org/10.17882/46124 DOI DOI of the product https://www.seanoe.org/data/00350/46124/ rel-canonical Seanoe