| The video clip you are about to see was recorded from a video camera
placed beneath the experimental tank (diagram on right) showing a
ventral view of the sculpins body as it moves towards the vibrating
sphere in the center of the tank. Although the source itself is
somewhat difficult to see in the video clip, its location can be found
by looking for the center of the 'bull's eye' marked on the bottom of
the tank. Each ring surrounding the bull's eye corresponds to a fixed
radial distance of 3, 6 or 9 cm from source center. Light pulses from
the light-emitting diode (LED) in the lower right-hand corner of the
video screen are synchronized to the vibrational bursts of the source.
At signal onset, the sculpin responds with an initial, whole-body
orienting response, followed by a step-wise approach to the source,
and ending in a bite or strike at the source. Note that the approach
movements of this benthic fish are predominantly confined to a single
horizontal plane along the floor of the tank. |
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Click  to view video clip (1.7MB) |
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