4. Observation of Marine Mammals and River Dolphins using AUVs and Acoustic Systems ( Bio Sonar) 2005 Sep.2005: Sperm whale following by the AUV "Aqua-explore 2000" and data logger Sep.2005: Research to make archives of recording data of marine mammals and river dolphins Jan.2006: Visit Chilika lagoon in India to observe small cetacean such as Irrawaddy dolphin for future investigation into Ganga river dolphin Mar.2006: International Workshop on Bio-Sonar in IIS Campus * reference: January 2006: Acoustic Survey of Irrawaddy Dolphins in Chilika (IIS URA Laboratory Website) Sperm Whales across the Research Vessel Natsushima (Sep.2005) Squid in 868m Depth Off Ogasawara Taken by AUV Aqua-Explore 2000 Camera (Sep.2005) Depth, Altitude of AUV Aqua-Explore 2000 and Seabed Configuration during the Dive for Taking Squid Photos (Sep.2005) Multi-Animal Acoustic Observation System (Jan.2006) Observation Points at Chilika Lake (Jan.2006) Irrawaddy Dolhin at Chilika Lake (Jan.2006) Click Trains of Irrawaddy Dolhins Taken by Multi-Animal Acoustic Observation System (Jan.2006) A-tag by Fisheries Research Agency, Japan (Jan. 2006) A-tag provides number of dolphins (Jan. 2006)