1. HVALATAL „ACOUSTIC TECHNIQUES TO STUDY MARINE MAMMALS“ Rannsókna- og fræðasetur Háskóla Íslands á Norðausturlandi, Húsavík Húsavík Research Center Marianne Helene Rasmussen

2. Markmið - Aim  Rannsóknir á sjávarspendýrum  Research on marine mammals

3. The past  Research on white-beaked dolphins  Humpback whales singing in Icelandic waters?

4. White-beaked dolphins

5. Echolocation

6. Automatic gain control? Rasmussen et al., 2002

7. A click sequence Rasmussen and Miller, 2002 Click intervals (ms) Time (ms)

8. Start frequency End frequency duration 12 seconds 40 kHz 20 5 Rasmussen and Miller, 2002 Whistles

9. Directionality of the signals?  Narrow beam for echolocation  Broad beam for communication Rasmussen et al., 2004 Rasmussen et al, 2006

10. High frequency on-axis click F 0 = 94 kHz SL=176 dB F 0 = 56 kHz, SL=159 dB F 0 = 87 kHz, SL=173dB F 0 = 63 kHz, SL=163 dB -60 dB -72 dB

11. Audiogram of a dolphin?

12.  We netted two dolphins in > 340 hrs on the water

13. Audiogram of a dolphin?

15.  Nachtigall et al., 2008

16. Acoustic tagging and foraging 19 fouraging events

17. Migration of a white-beaked dolphin  8 August 2006 to 24 February 2007 (201 days) Total distance traveled=5280 km (1090 km in August) Average speed=4 km/hr Spent 44% of time in Faxaflói Bay Faxaflói Breiðafjörður 100 m depth contour Vestmannaeyjar Aug Sept Dec Oct Nov, Feb Aug, Oct to Feb Jan

18. Release of dolphin

19. Humpback whale song  The goal was to compare humpback whale song from the Northeast Atlantic population. Do they sing the same song in Icelandic waters as by the Cap Verde islands?

20. theme 1 phrase 1 units theme 2 phrase 2 song phrase 1

21. Humpback whale song

22. The future  Deploying Ecological Acoustic Recorders (EAR’s) in Skjálfandi Bay in Cooperation with Dr. Marc Lammers, University of Hawaii to study the annual distribution of Cetaceans in the Bay

23. EAR’s  Variable bandwidth up to 30 kHz

24. The future  Recordings of Blue whales  Recordings of killer whales

25. Thank you for your attention