Premilinary results of the effects of SURTASS-LFA sonar on singing humpback whales
Miller, Patrick J. O.
Tyack, Peter L.
MetadataShow full item record
The singing behavior of humpback whales exposed to SURTASS-LFA sonar was monitored in Hawaii during March 1998. An observation vessel towing a hydrophone array followed individual singers continuously recording their songs and the received level of sonar near the whale. At least 2 complete songs were recorded before commencing a 60min 42s long playback, which consisted of ten 42s signals transmitted every 6 min. by a U.S. Navy vessel. Observations continued into the post-exposure period. Song spectrograms were broken into themes and phrases using visual analysis and aurol scoring. 23 focal follows were conducted; 5 were control follows with no playback. In 9 follows the whale sang throughout the playback, in 4 the whale stopped singing when it joined another whale and in 5 it stopped presumably in response to the playback. We recorded at least one complete song in all three experimental conditions from six individuals. These singers sang longer sonsgs during (13.75min) than before (10.68min) or after (10.58min) the playback (model III ANOVA, p=0.047, n=6). No differences were found in theme order. Song cessation and song duration responses did not scale with sonar received level. High variability in individual responses may indicate that some males were more sensitive to the sonar than others.
Showing items related by title, author, creator and subject.
Watkins, William A.; Daher, Mary Ann; George, Joseph E.; Haga, Scott H. (Woods Hole Oceanographic Institution, 2000-12)The seasonal distribution of calling ble whales (Balaenoptera musculus), fin whales (B. physalus), and singing humpback whales (Megaptera novaeangliae) has been analyzed from acoustic data recorded by the U.S. Navy Sound ...
Bottom side-roll feeding by humpback whales (Megaptera novaeangliae) in the southern Gulf of Maine, U.S.A Ware, Colin; Wiley, David N.; Friedlaender, Ari S.; Weinrich, Mason T.; Hazen, Elliott L.; Bocconcelli, Alessandro; Parks, Susan E.; Stimpert, Alison K.; Thompson, Michael A.; Abernathy, Kyler (John Wiley & Sons, 2013-07-24)Humpback whales (Megaptera novaeangliae) are known for the variety and complexity of their feeding behaviors. Here we report on the use of synchronous motion and acoustic recording tags (DTAGs) to provide the first detailed ...
Whales and waves : humpback whale foraging response and the shoaling of internal waves at Stellwagen Bank Pineda, Jesus; Starczak, Victoria R.; da Silva, Jose C. B.; Helfrich, Karl R.; Thompson, Michael A.; Wiley, David N. (John Wiley & Sons, 2015-04-02)We tested the hypothesis that humpback whales aggregate at the southern flank of Stellwagen Bank (SB) in response to internal waves (IWs) generated semidiurnally at Race Point (RP) channel because of the presence of their ...