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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 night

 Adult and juvenile black redhorse and tagged greater redhorse


 mature adult black redhorse from the Grand River in Homer Watson Park, Kitchener Ontario juvenile black redhorse from the Grand River in Homer Watson Park   

Seining and electrofishing for black redhorse in the Grand River


 electrofishing for black rehorse in the Grand River, Kitchener Ontario

Golden (top) vs. Black (bottom) redhorse


Difference between the head of black and golden redhorse Difference between black and golden redhorse scales and lateral line Difference between black and golden redhorse mouths

Click here to view our latest hatchery research and black redhorse ontogeny and larval habitat preferences

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