Maxwell Alyssa, Hansen Kirstin Anderson, Ortiz Sara Torres, Larsen Ole Næsbye, Siebert Ursula, Wahlberg Magnus
Marine Biological Research Centre, Department of Biology, University of Southern Denmark, Hindsholmvej 11, Kerteminde DK-5300, Denmark
Marine Biological Research Centre, Department of Biology, University of Southern Denmark, Hindsholmvej 11, Kerteminde DK-5300, Denmark.
Biol Open. 2017 Apr 15;6(4):496-502. doi: 10.1242/bio.023879.
Many aquatic birds use sounds extensively for in-air communication. Regardless of this, we know very little about their hearing abilities. The in-air audiogram of a male adult great cormorant () was determined using psychophysical methods (method of constants). Hearing thresholds were derived using pure tones of five different frequencies. The lowest threshold was at 2 kHz: 18 dB re 20 µPa rms. Thresholds derived using signal detection theory were within 2 dB of the ones derived using classical psychophysics. The great cormorant is more sensitive to in-air sounds than previously believed and its hearing abilities are comparable to several other species of birds of similar size. This knowledge is important for our understanding of the hearing abilities of other species of sea birds. It can also be used to develop cormorant deterrent devices for fisheries, as well as to assess the impact of increasing in-air anthropogenic noise levels on cormorants and other aquatic birds.
许多水鸟在空气中交流时广泛使用声音。尽管如此，我们对它们的听力能力却知之甚少。使用心理物理学方法（恒定刺激法）测定了一只成年雄性普通鸬鹚的空中听力图。使用五种不同频率的纯音得出听力阈值。最低阈值出现在2千赫：相对于20微帕均方根声压为18分贝。使用信号检测理论得出的阈值与使用经典心理物理学得出的阈值相差在2分贝以内。普通鸬鹚对空气中声音的敏感度比之前认为的更高，其听力能力与其他几种体型相近的鸟类相当。这一知识对于我们理解其他海鸟物种的听力能力很重要。它还可用于开发渔业用的鸬鹚威慑装置，以及评估空气中人为噪声水平增加对鸬鹚和其他水鸟的影响。
