Dugong (Dugong dugon) vocalization patterns recorded by automatic underwater sound monitoring systems
Dugong (Dugong dugon) vocalization patterns recorded by automatic underwater sound monitoring systems
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DOI：
10.1121/1.2201468
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发表时间：
2006-06-01
影响因子：
2.4
通讯作者：
Adulyanukosol, K
中科院分区：
文献类型：
--
作者：
Ichikawa, K;Tsutsumi, C;Adulyanukosol, K
为了定量研究昼夜或潮汐对儒艮行为的影响，我们采用被动声学观察技术来监测动物。儒艮自动水下声音监测系统（AUSOMS-D）部署在泰国隆邦岛南部约5米深的海底。AUSOMS-D以44.1 kHz的采样频率连续记录了超过116小时的立体声水下声音。新开发的软件自动检测到的儒艮呼叫，检测率为36.1%，误报率为2.9%。在164小时的记录中，总共检测到3453个呼叫。自相关的呼叫率表明，出席周期约为24或25小时，和最频繁的发声观察0300至0500小时。声源的计算方位，即，在监测期间，使用儒艮作为跟踪儒艮相对数量的指标。(c)2006年，美国声学学会。
To quantitatively examine the diurnal, or tidal, effects on dugong behavior, we employed passive acoustic observation techniques to monitor the animals. Automatic underwater sound monitoring systems for dugongs (AUSOMS-D) were deployed on the sea floor at depths of about 5 in south of Talibong Island, Thailand. The AUSOMS-D recorded underwater sound in stereo at a sampling frequency of 44.1 kHz for more than 116 consecutive hours. Dugong calls were automatically detected by newly developed software with a detection rate of 36.1% and a false alarm rate of 2.9%. In total, 3453 calls were detected during the 164 h of recording. The autocorrelation of the call rate indicated an attendance cycle of about 24 or 25 h, and the most frequent vocalizations were observed from 0300 to 0500 h. The calculated bearings of the sound sources, i.e., dugongs, were used as an indicator to track the relative numbers of dugongs during the monitoring periods. (c) 2006 Acoustical Society of America.