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CONFERENCE SCHEDULE UPDATES & CHANGES: As a result of the prolonged government shutdown, we experienced a number of cancellations and changes to the schedule. Cancellations and changes are listed here (as of January 26, 2019). 

Monday, January 28 • 3:40pm - 4:00pm
(FISHERIES: FISH CONSERVATION) The Cart Before the Redhorse: Examining Summer Habitat Use of the Threatened River Redhorse (Moxostoma carinatum) to Guide Future Management

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AUTHORS: Nicholas Preville, Grand Valley State University

ABSTRACT: The resiliency of our aquatic ecosystems hinges on our ability to protect the native species that reside there. The River Redhorse (Moxostoma carinatum) is one such example and populations have become low enough to warrant listing by the State of Michigan. Causes of decline include overfishing, habitat alteration, and lack of knowledge of basic life-history attributes including the use of non-spawning habitat. In order to aid its recovery, we implanted 15 individuals with radio transmitters and tracked their locations over the course of a summer. Tagged River Redhorse were found to move as far as 50 km down river following spawning and establish themselves in small home ranges. Substrates in these home ranges were dominated by gravel which represented 59 percent of samples. Little preference for depth or velocity was shown among the tracked fish. However, general habitat use was dominated by runs and riffles which represented 58 and 27 percent of tracked locations respectively. Presence of mussels and snails, the River Redhorse’s preferred food source, appeared to be the best predictor for the River Redhorse’s use of an area as they were found at 79 percent of all tracked locations. The recovery of the River Redhorse will likely depend on our ability to protect these newly discovered feeding areas as well as any known spawning sites. Future management should therefore focus on the protection of native mussels and snails and should attempt to maintain connectivity between spawning and summer habitats.

Monday January 28, 2019 3:40pm - 4:00pm
CENTER STREET ROOM C

Attendees (9)