The Sensory Physiology of Aquatic Mammals

Perception of Low-Frequency Acoustic Signals by a Harbour Porpoise (<I>Phocoena phocoena</I>) in the Presence of Simulated Offshore Wind Turbine Noise

“…This technique has been successfully used before (cf. Supin et al, 2001, for review) and provides in principle the opportunity to collect data in a relatively short period of time. The acoustic conditions of the research environment in which this study was conducted demanded an intermediate approach, which included behavioural training and active participation of the study animal.…”

“…A second method (cf. Supin et al, 2001) includes a visual analysis of data prior to a regression analysis. This method is based on the fact that the EFR values at the frequency of amplitude modulation ideally decrease clearly from high values at supra-threshold stimuli levels to medium values at lower intensities.…”

“…Threshold and Masking Analysis-The analysis, as used for example, by Supin et al (2001), included only those data which were visually identified as being close to the threshold. The results for the masking experiment at 2.0 and 2.8 kHz are listed in Table 2(a) for all three masking conditions.…”

“…The typical AEP of a harbour porpoise, similar to that of a bottlenose dolphin (Tursiops truncatus), has three positive and two negative peaks with increasing amplitudes, but the harbour porpoise waves have longer latencies than those in bottlenose dolphins (Bullock et al, 1968;Ridgway et al, 1981;Bibikov, 1992;Supin et al, 2001).…”

Sensory biology of aquatic mammals

“…In addition, the polar bear (Ursus maritimus) and the sea otter (Enhydra lutris) are counted among the marine mammals. For information on the sensory biology of the polar bear, the reader is referred to Nachtigall et al (2007); for the sea otter, to Murphy et al (1990) and Ghoul and Reichmuth (2012); for marine mammals in general, to Supin et al (2001), Dehnhardt (2002) and Thewissen and Nummela (2008). All major clades of marine mammals also include species that live fully or partly in fresh water, such as the Baikal seal (Pusa sibirica), two families of river dolphins (Iniidae and Platinistidae), dolphins of the genera Sotalia, Sousa and Orcaella, and the manatees (Trichechus).…”