Heimlich Sara L, Mellinger a David K, Nieukirk Sharon L, Fox Christopher G
Cooperative Institute for Marine Resources Studies, Oregon State University, and NOAA Pacific Marine Environmental Laboratory, 2030 SE Marine Science Drive, Newport, Oregon 97365, USA.
J Acoust Soc Am. 2005 Sep;118(3 Pt 1):1830-7. doi: 10.1121/1.1992674.
Vocalizations resembling known Bryde's whale sounds were recorded on autonomous hydrophones at seven sites in the eastern tropical Pacific. Five short (<3 s) low-frequency (<80 Hz) "phrase" types were observed. "Swept alternating tonal" phrases included a 37-Hz tone and often a 25-16-Hz downswept tone, while "nonswept alternating tonal" phrases had a predominant tone at 29 Hz and often additional tones at 16 and 47 Hz. Alternating tonal phrases were found in 79% of the total hours in which phrases were detected, and occurred primarily at the eastern hydrophone sites. "Burst-tonal" phrases included tones that were often preceded by a wideband burst of noise. The "low burst-tonal" phrase contained tones at 19 and 30 Hz, and was detected at five of the hydrophone sites. The "high burst-tonal" phrase included a 42-Hz tone and was observed only on the northwestern hydrophones. A single "harmonic tone" phrase type was observed that included a fundamental tone at 26 Hz and at least two harmonics; this phrase was observed exclusively at the eastern hydrophone stations. This opportunistic survey has shown that acoustics is an effective means of studying this poorly understood, pelagic balaenopterid.
在东热带太平洋的七个地点，通过自主水听器记录到了类似已知布氏鲸声音的发声。观察到了五种短（<3秒）低频（<80赫兹）的“短语”类型。“扫频交替音调”短语包含一个37赫兹的音调，通常还有一个25 - 16赫兹的下扫频音调，而“非扫频交替音调”短语在29赫兹有一个主音调，通常在16和47赫兹还有其他音调。在检测到短语的总时长中，79%发现了交替音调短语，且主要出现在东部水听器站点。“猝发音调”短语包含的音调之前通常有一个宽带噪声猝发。“低猝发音调”短语包含19和30赫兹的音调，在五个水听器站点被检测到。“高猝发音调”短语包含一个42赫兹的音调，仅在西北水听器上被观察到。观察到一种单一的“和声音调”短语类型，包含一个26赫兹的基音和至少两个谐波；这个短语仅在东部水听器站点被观察到。这项机会性调查表明，声学是研究这种了解甚少的远洋须鲸科动物的有效手段。
