To return to the Midwest Fish & Wildlife Conference website, go to http://www.midwestfw.org/ The following schedule and room names are subject to change (as of February 1, 2017). Please check back for updates. 

Presenters for technical presentations are either the primary author (the first name listed in the abstract), or are indicated with an asterisk next to their name. 

Please note:
 the conference schedule is hosted by Sched.org which allows you to search within the schedule, and filter the schedule to show sessions only occurring on a certain date or within a track. You can also build your own schedule by creating a free account with Sched.org by selecting "SIGN UP" in the top right corner. 
Back To Schedule
Tuesday, February 7 • 9:40am - 10:00am
Technical Session. Quantification of Daily Otolith Increments in Young of Year Asian Carp

Sign up or log in to save this to your schedule, view media, leave feedback and see who's attending!

AUTHORS: Emily A. Szott, James T. Lamer - Department of Biological Sciences, Western Illinois University; James H. Larson, Brent Knights, Jon Vallazza - Upper Midwest Environmental Sciences Center, U.S. Geological Survey; Levi Solomon, Andrew Casper - Illinois River Biological Station, Illinois Natural History Survey; Rich Pendleton, Hudson River Estuary Program/Cornell University, New York State Department of Environmental Conservation; Jun Wang, Shanghai Ocean University

ABSTRACT: Silver and bighead carp are invasive species established throughout the Mississippi River Basin. Many studies and resources have been dedicated to their management. However, information on hydrological spawning triggers and growth of young of year Asian carp is still lacking. Here, daily incremental growth annuli from otoliths are used to estimate birth and growth of young of year Asian carp. We collected young of year Asian carp from the LaGrange Reach of the Illinois River following a spawning event in August 2014. Total length of each fish was measured, and the fish separated into 5 mm length groups (15-79 mm). Otoliths were extracted, mounted to slides, polished, photographed, and aged. Otolith microstructure was validated using young of year Asian carp from Chinese aquaculture. Preliminary results show the collected Asian carp range from 32 to 103 days old, placing their birthdays between April 25 and July 5, 2014. Validation determined that 10-20 day old fish can accurately be aged within ±1.4 days, and 30-50 day old fish can accurately be aged within ±4 days. Further study of age will help determine spawning periodicity and hydrological spawning triggers. Ultimately, the ability to determine daily growth rates of young of year Asian carp will help in the management of these invasive species.

Tuesday February 7, 2017 9:40am - 10:00am CST
Grand Ballroom B