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Physiological and behavioural responses of sea lamprey to low frequency sound
2 Department of Biological Sciences,
University of Windsor, Windsor ON Canada
3 USGS, GLSC 11188 Ray Road,
Millersburg, MI USA
May 2019
ABSTRACT:
Hearing ability is well studied
across teleost fishes in general, and vertebrates more broadly, but little is
known about sound detection abilities of lampreys (Petromyzontiformes),
a basal extant vertebrate group. The sea lamprey (Petromyzon marinus) is a destructive
invader of the Laurentian Great Lakes, while numerous lamprey species
(including the sea lamprey) are imperiled in their
native ranges. In both management scenarios, behavioral manipulation tactics to
control movement and distribution are desired.
Therefore, we describe the hearing ability and behavioral responses of adult
and juvenile sea lamprey to sound to reveal how hearing may have evolved in
vertebrates and determine possible management applications. Based on auditory
evoked potentials, sea lamprey detected tones from 50-300 Hz with equal
sensitivity, but did not detect sounds above 300 Hz. In a laboratory bioassay,
sea lamprey behaviorally responded to sound from 50-200 Hz, with a general
increase in swimming and a decrease in resting behaviours
at both juvenile and adult stages relative to no-sound controls. To our
knowledge, this is the first test of lamprey hearing and the results support
that sound may be a means to modify lamprey behaviour
for management purposes.
on a broader basis.