Use of acoustics in studies of fish reaction to imposed stimuli
Original version
This report is not to be cited without prior reference to the authorsAbstract
The general distribution pattern of fish in a large holding pen
is described through the integrated echo intensity in six
separate cells using transducers mounted below the pen. The
reaction of fish to different stimuli, imposed in one of the
cells, is quantified by the change in frequency distribution of
the echo intensity relative to the undisturbed situation. The
experiment was part of a small-scale test of equipment to be
used for observations of the attraction-effect of fish to
oil-rig structures. The method also seems to be suitable for
general fish behaviour studies, particularly concerning
attraction and avoidance effects.