- Grand River, Ontario 2007 -
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.
to see a video of juvenile black redhorse at night
Adult and juvenile black redhorse and tagged greater redhorse
Seining and electrofishing for black redhorse in the Grand River
Golden (top) vs. Black (bottom) redhorse
to view our
latest hatchery research and
black redhorse ontogeny
and larval habitat preferences