| 圈养瓶鼻海豚对20 kHz连续声信号的行为响应研究 |
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| 引用本文： | 牛富强,许肖梅,杨燕明,刘贞文,文洪涛.圈养瓶鼻海豚对20 kHz连续声信号的行为响应研究[J].声学学报,2012,37(6):595-600. |
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| 作者姓名： | 牛富强 许肖梅 杨燕明 刘贞文 文洪涛 |
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| 作者单位： | 1 厦门大学海洋与环境学院 厦门 361005; |
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| 基金项目： | 国家海洋局青年科学基金(2010422)、海洋公益性行业科研专项(201105011-3)项目和国家海洋局第三海洋研究所基本科研业务专项(海三科2009010)资助。 |
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| 摘 要： | 将20 kHz连续声信号作为刺激信号,测试了厦门某海湾圈养的两只瓶鼻海豚对该信号的行为变化。通过对比信号发射期与间歇期海豚相对声源的水面距离、露出水面的次数以及水下发出的click定位声信号的数目等变化,判断发射信号对海豚行为的影响。给出了瓶鼻海豚对测试信号产生躲避行为的声压级门限(154±2 dB re 1μPa,rms),并与鼠海豚的躲避声压门限级进行了对比。结果表明:信号发射期,瓶鼻海豚移离了声源位置,增加了露出水面的次数,水下发出click声信号的次数明显减少。因此,瓶鼻海豚对20kHz连续信号产生了行为改变。
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| 收稿时间： | 2010-03-03 |
Behavioral responses of captive bottlenose dolphins (Tursiops truncatus) to a continuous 20 kHz pure tone |
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| Affiliation: | 1 College of Oceanography and Environmental Science Xiamen University Xiamen 361005;2 Third Institute of Oceanography SOA Xiamen 361005 |
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| Abstract: | Two captive bottlenose dolphins housed in a float cage in a Bay were subjected to a continuous 20 kHz tonal signal.The behavioral responses of dolphins were judged by comparing the surface distances relative to the sound source,number of surfacings,and number of the echolocation clicks production of the dolphins,during test periods and baseline periods.The avoidance threshold sound pressure level (SPL) for a continuous 20 kHz tonal signal for the bottlenose dolphins was estimated to be 154±2 dB(re 1μPa,rms).In addation,the comparison between the avoidance threshold SPL for harbor porpoises to a 50 kHz continuous signal and bottlenose dolphins to a 20 kHz continuous signal was also studied.The results showed that the dolphins moved away from the sound source and came to the surface more frequently during the test periods than the baseline periods,but they produced clicks significantly fewer.Therefore,a continuous 20 kHz tonal signal seems to deter bottlenose dolphins from an area. |
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