Forwarded from Brandon Southall, :
This summer, a series of experiments (the Behavioral Response Study-2007, or BRS-07) to
study deep-diving cetaceans was conducted in the Tongue of the Ocean, just off Andros
Island in the Bahamas. In addition to extensive photo-identification efforts,
specialized archival tags ("D-tags" from Woods Hole Oceanographic Institution)
were deployed on both Blainville's beaked whales (Mesoplodon densirostris) and
short-finned pilot whales (Globicephala macrorhynchus) to determine baseline diving,
foraging, and social behavior. Using careful protocols and monitoring, controlled sound
exposures were used in two occasions to obtain detailed information regarding the
behavioral reactions of these species to both natural and artificial sounds in the
mid-frequency (1-10 kHz) band. The initial results, while admittedly limited in several
regards, demonstrate that these kinds of established procedures can be applied safely to
deep-diving cetaceans using mid-frequency sounds and yield de
tailed information about behavioral responses.
The BRS scientific team has prepared a short cruise report summary for BRS-07 that is
now publicly available at <http://www.nmfs.noaa.gov/pr/acoustics/brs-07.htm> .
Please note that this is not a peer-reviewed document and is not intended for
citation. It is simply a summary of the results of the first phase of BRS at a
relatively early stage of analysis. Additional analyses are underway and results
will be subjected to the scientific peer-review process in due course. A complete
cruise report will be available, on request, at a later point. Anyone interested in
the initial results should contact the contributing scientists on the BRS team for
permission and direction regarding appropriate referencing of information in the
interim. Apologies for the cross-posting.
Brandon Southall (principal investigator)
on behalf of the BRS core science team:
Brandon L. Southall, Ph.D.
Director, NOAA Ocean Acoustics Program
National Marine Fisheries Service
Office of Science and Technology
1315 East West Hwy, SSMC III #12539
Silver Spring, MD 20910-6233
301-713-2363 x163 (office)