ACOUSTIC DETECTION of BLUE and FIN WHALE
SEASONALITY
| John Hildebrand | |
| Scripps Institution of Oceanography | |
| University of California San Diego |
| Ana Sirovic, SIO | |
| Sean Wiggins, SIO | |
| Mark McDonald, Whale Acoustics Inc. | |
| Sue Moore, NMML/PMEL NOAA | |
| Deb Thiele, Deakin University, Australia | |
| Ari Friedlaender, Duke University | |
GENERAL ATTRIBUTES OF ACOUSTIC DETECTION
| Works day and night. | |
| Independent of weather. | |
| Monitors broad areas over long periods. | |
| Provides information on populations |
Acoustic Recording Packages (ARPS)
| Continuous acoustic sampling at 500 Hz | |
| Seafloor mooring; hydrophone suspended 5m above frame. | |
| Calls recorded to hard disk for 12 months. |
Results: Site 1- Off Livingston Is.
Results: Site 2- Off Anvers Is.
Results: Site 3- Off Renaud Is.
Results: Site 4- Off Adelaide Is.
| Blue whales present year-round | |
| peak calling in Jan - Feb | |
| autumn -- more calling at northern sites | |
| summer -- more calling at southern sites | |
| Fin whales | |
| present seasonally | |
| peak calling in Apr - May | |
| highest calling rates site 1&2 | |