Dunn Robert A, Hernandez Olga
Department of Geology and Geophysics, University of Hawaii, Manoa 1680 East-West Road, Honolulu, HI 96822, USA.
J Acoust Soc Am. 2009 Sep;126(3):1084-94. doi: 10.1121/1.3158929.
Low frequency northeastern Pacific blue whale calls were recorded near the northern East Pacific Rise (9 degrees N latitude) on 25 ocean-bottom-mounted hydrophones and three-component seismometers during a 5-day period (November 22-26, 1997). Call types A, B, C, and D were identified; the most common pattern being approximately 130-135 s repetitions of the AB sequence that, for any individual whale, persisted for hours. Up to eight individual blue whales were recorded near enough to the instruments to determine their locations and were tracked call-by-call using the B components of the calls and a Bayesian inversion procedure. For four of these eight whales, the entire call sequences and swim tracks were determined for 20-26-h periods; the other whales were tracked for much shorter periods. The eight whales moved into the area during a period of airgun activity conducted by the academic seismic ship R/V Maurice Ewing. The authors examined the whales' locations and call characteristics with respect to the periods of airgun activity. Although the data do not permit a thorough investigation of behavioral responses, no correlation in vocalization or movement with airgun activity was observed.
1997年11月22日至26日的5天时间里，在东太平洋海隆北部（北纬9度）附近，通过25个海底水听器和三分量地震仪记录了低频东北太平洋蓝鲸的叫声。识别出了A、B、C和D四种叫声类型；最常见的模式是AB序列大约每130 - 135秒重复一次，对于任何一头鲸鱼来说，这种模式会持续数小时。在离仪器足够近的地方记录到了多达8头蓝鲸，从而确定它们的位置，并利用叫声的B分量和贝叶斯反演程序逐叫声追踪它们。对于这8头鲸鱼中的4头，确定了它们在20 - 26小时内的完整叫声序列和游动轨迹；其他鲸鱼的追踪时间则短得多。这8头鲸鱼是在学术地震船“R/V莫里斯·尤因”号进行气枪活动期间进入该区域的。作者研究了鲸鱼相对于气枪活动时间段的位置和叫声特征。尽管数据不允许对行为反应进行全面调查，但未观察到发声或移动与气枪活动之间存在相关性。
