[MARMAM] New Publication: Sand lance detection of low frequency tones and whale predator sounds

S.M. Strobel smstrobel at gmail.com
Fri Dec 14 09:54:37 PST 2012


Dear MARMAM Subscribers,

We are pleased to announce a recent publication on sand lance auditory
sensitivity and ability to detect sounds made by their humpback whale
predators:

*Strobel SM and Mooney TA. 2012. Detection of low frequency tones and whale
predator sounds by the American sand lance *Ammodytes americanus*. Journal
of Fish Biology 81: 1646-1664. doi:10.1111/j.1095-8649.2012.03423.x*

*Abstract: *Auditory evoked potentials (AEP) were used to measure the
hearing range and auditory sensitivity of the American sand lance *Ammodytes
americanus*. Responses to amplitude-modulated tone pips indicated that the
hearing range extended from 50 to 400 Hz. Sound pressure thresholds were
lowest between 200 and 400 Hz. Particle acceleration thresholds showed an
improved sensitivity notch at 200 Hz but not substantial differences
between frequencies and only a slight improvement in hearing abilities at
lower frequencies. The hearing range was similar to Pacific sand lance
*Ammodytes
personatus* and variations between species may be due to differences in
threshold evaluation methods. AEPs were also recorded in response to pulsed
sounds simulating humpback whale *Megaptera novaeangliae* foraging
vocalizations termed megapclicks. Responses were generated with pulses
containing significant energy below 400 Hz. No responses were recorded
using pulses with peak energy above 400 Hz. These results show that *A.
americanus* can detect the particle motion component of low-frequency tones
and pulse sounds, including those similar to the low-frequency components
of megapclicks. *Ammodytes americanus* hearing may be used to detect
environmental cues and the pulsed signals of mysticete predators.

*Keywords:* auditory brainstem response; communication; feeding; noise;
sand eel; sensory ecology

You can can download the PDF or view in HTML at
http://onlinelibrary.wiley.com/doi/10.1111/j.1095-8649.2012.03423.x/full
Please contact me if you have any questions or do not have access to the
article (smstrobel at gmail.com)

All the best,
Sarah McKay Strobel
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