Bunt, C.M. 1999. A tool to facilitate implantation of electrodes
for electromyographic telemetry experiments. Journal of Fish Biology. 55: 1123-1128.
Abstract - Conventional techniques for implanting electrodes
into axial swimming musculature of fish are reviewed. A new device is described that
reduces time for electrode implantation, ensures constancy in electrode orientation,
implantation depth, and separation distance. This device is inexpensive, simple to build,
and easy to use.
Bunt, C.M. 1999.
evaluation of difficulty during use of two Denil fishways for smallmouth bass (Micropterus
dolomieu). In: Fishways for warmwater
fishes: utilization patterns, attraction efficiency, passage efficiency and relative
physical output. Ph.D. thesis. University of Waterloo.
Abstract - Electromyogram (EMG) telemetry was used to measure
the relative physical output required for smallmouth bass Micropterus dolomieu to
use two different Denil fishway designs. The fishways differed in length, slope and water
velocity. Smallmouth bass (n = 7) were implanted with transmitters that broadcast
integrated signals representing axial muscular contraction rates to a submerged antenna
array within each fishway. There was a significant positive relationship between activity
of the swimming muscles and the position of each fish between the fishway entrance and
exit. Mean EMG pulse rates from each fish that swam from the entrance to exit of a short,
steep fishway increased by 13 55 % relative to basal levels. Maximum subsurface
water velocities during fishway use were 0.4 1.4 m/s. In a long fishway with
reduced slope and resting pools, maximum subsurface water velocities were 0.35 - 0.9 m/s
and EMG levels increased by 17 to 47 % of basal levels as fish swam from the entrance to
the exit. EMG levels were significantly greater in the upper regions of each fishway
compared to the entrances. EMG levels from areas near the fishway exits were also
significantly greater than maximum EMG levels recorded during critical swimming speed
trials. Smallmouth bass appeared to exceed their aerobic scope of activity during ascent
of both fishways. EMG data reflected combinations of burst and prolonged swimming activity
and indicated the relative differences in muscular activity and physical output required
to ascend each fishway type.