Grand River Radio Telemetry
Bunt C.M. and S.J.
Cooke. 2000. Greater redhorse, Moxostoma valenciennesi,
post-spawn movements and habitat use. Ecology of
Freshwater Fish. In Press.
- A combination of radio telemetry and surface
observations were used to characterize the movements and
habitats of greater redhorse, Moxostoma valenciennesi,
after spawning in the Grand River, Ontario, Canada. This
river supports a large population of greater redhorse that
migrate upstream in the spring to spawn on riffles. After
spawning, greater redhorse moved as far as 15.2 km
downstream of spawning areas, and maintained summer home
ranges in low velocity runs. Mean (± SE) water depth used
by greater redhorse was 46.3 ± 0.9 cm and water velocities
were less than 5 cm/s. Greater redhorse were usually
located over cobble/gravel substrates that were covered
with Cladophora. Although interspecific
associations with golden redhorse, M. erythrurum,
common carp, Cyprinus carpio, smallmouth bass,
Micropterus dolomieu, and northern hog sucker,
Hypentelium nigricans, were observed, most greater
redhorse associated with conspecifics. Areas and habitat
types used throughout the summer did not change, until
relocation to overwintering areas occurred in early
for other redhorse studies
Smallmouth Bass Telemetry
Bunt, C.M., S.J. Cooke and D.P. Philipp. 2000.
Effects of displacement on movement and habitat use of
derby-caught smallmouth bass. American Fisheries Society
for other smallmouth bass studies
Smallmouth Bass Ecology
Cooke S.J., C.M. Bunt and R.S. McKinley. 1998.
Derby-determined vital statistics and trends of the
smallmouth bass, Micropterus dolomieu, recreational
fishery in the middle reaches of the Grand River, Ontario.
Canadian Field-Naturalist. 112: 451-458.
Abstract - Data from
Grand River Bass Derbies (1988 - 1997) documents trends in
relative abundance and provides information on vital
of smallmouth bass (Micropterus dolomieu)
in the recreational fishery on the Grand River, Ontario.
The length-weight relationship for all fish entered in the
derby was described as weight (g) = (2 x 10-5)
x total length (mm)2.95. A significant
declining trend in mean length existed for the 10 longest
fish entered in the derby each year over the 10 year
0.071, p <
0.05). Relative weights observed were consistently below
the length specific standard of 100, similar to other
riverine smallmouth bass populations. Age and growth
rates were similar to other northern riverine smallmouth
bass populations, and the oldest fish observed was 16+
(441 mm TL). Trends in the middle Grand River Catch Per
Unit Effort (CPUE) data suggest that the relative
abundance of smallmouth bass has decreased significantly
since 1988 (r2
= 0.552, p < 0.05), although the 10-year derby CPUE (0.36)
is similar to CPUE from other riverine populations. The
derby data suggest that the population size and structure
require further investigations to determine exactly where
problems and management opportunities exist.