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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). 

Tuesday, January 29 • 6:00pm - 9:00pm
(STUDENT RESEARCH POSTER 3) Habitat Use of Larval Fish in Backwater Reaches of the Upper Mississippi River

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AUTHORS: Tyler Thomsen, Western Illinois University; Madeline Tomczak, Western Illinois University; Boone La Hood, Illinois Department of Natural Resources, Division of Fisheries; Kevin Irons, Illinois Department of Natural Resources, Division of Fisheries; and James Lamer, Illinois River Biological Field Station

ABSTRACT: Since the unintended introduction into the waterways of the southern United States in the 1970?s, Asian Carp have become widely established throughout a majority of the Mississippi River drainage basin. Abundances of Asian Carp have remained low in Pools 17, 18, and 19, due to the structural characteristics of Lock and Dam 19. Adult Asian Carp have been closely monitored, however larval fish communities in these pools have not been well characterized. The objectives of this study were to investigate and describe early life history of Asian Carp, as well as to describe larval fish habitat preference in the Upper Mississippi River. Early stages of Asian Carp require backwater reaches of riverine habitat to grow and develop. Quatrefoil light traps were used to sample for larval fishes from May to September of 2016 and 2017 when main channel water temperatures were above 17?C. To better determine habitat use, twelve light traps were deployed for a minimum of one hour at various locations representing several habitat conditions. The conditions sampled were recorded as woody or vegetation for cover, and open or shoreline for location. Weather conditions were recorded as calm or windy, as well as clear or rainy. Water quality was tested for each light trap location. Larval fish collected were enumerated, measured and identified to family. A total of 1,108 individual light trap samples were collected over the two-year period, representing twelve different families. A majority of the individuals identified were native cyprinid and centrarchids.

Tuesday January 29, 2019 6:00pm - 9:00pm
SUPERIOR BALLROOM C/D

Attendees (3)