Black Redhorse (Moxostoma duquesnei) Ecology -
Grand River, Ontario 2007 - 2013
In October 2007 a
large pool in the Grand River near
Kitchener, Ontario was sampled using seine
nets for adult black redhorse.
Backpack electrofishing gear was used to
collect juveniles. Several adult black
redhorse were tagged and released. In
late October, this region of the river was
sampled with a large boat electrofisher.
A total of 117 black redhorse were
anchor-tagged and PIT tagged and released.
Golden redhorse and greater redhorse were
also observed at these sites as well as
walleye, smallmouth bass, and common carp.
From October 30 to November 1, the river was
seined and an additional 54 black redhorse
were anchor-tagged and PIT tagged. Several
juvenile (size range 83-117 mm), and 1+
(195-206 mm) black redhorse, were observed.
Fish will be recaptured in late November.
Data from this tagging exercise will be used
to generate a population estimate for black
redhorse in the middle Grand River, and
long-term tracking data will be collected
from all PIT-tagged fish. Fish will be
tracked at two fishways upstream from the
collection site and at a river-wide
underwater antenna downstream from the
collection site to characterize temporal
migration patterns related to climate
change, water quality and river discharge.
Click here to
see a video of juvenile black redhorse at
Adult and juvenile
black redhorse and tagged greater redhorse
electrofishing for black redhorse in the
Golden (top) vs. Black
Click here to
view our latest hatchery research and black
redhorse ontogeny and larval