Sounds from airguns and blue whales recorded from a long term hydrophone network in the Southern Indian Ocean

The Southern Indian Ocean is a seasonal habitat for different blue whale sub species and sub populations. Their presence has been demonstrated by continuous acoustic records from the OHASISBIO hydrophone network, deployed since 2010 and which comprises 5 to 9 fixed mooring sites spread over a region from 24 deg to 56 deg South and from 52 deg to 83 deg East. Automated detection based on dictionaries and sparse representation has been used to...