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Tuesday, January 26 • 10:40am - 11:00am
Genetic Population Structure and Genetic Diversity of Adult Channel Ictalurus Punctatus and Blue I. Furcatus Catfish in Two Large Midwestern Rivers

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AUTHORS: V. Alex Sotola*, Eastern Illinois University; Aaron Schrey, Armstrong State University; Eric Bollinger, Eastern Illinois University; Les Frankland, Illinois Department of Natural Resources; Gregory W. Whitledge, Southern Illinois University; Robert E. Colombo, Eastern Illinois University

ABSTRACT: For sportfishes in large rivers, little information is currently available regarding their genetic population structure which can be vital to continuing the sustainable exploitation of these fisheries. In Illinois, channel and blue catfish are two of the most important commercial and recreational fisheries in large rivers; therefore, understanding and assessing their genetic population structure and diversity should be of utmost importance for managers. We screened ten microsatellite loci to assess the genetic population structure and diversity of channel catfish from four sites on the Wabash River and four sites on the Ohio River. We also screened blue catfish from two sites on the Wabash River and four sites on the Ohio River. We characterized the genetic population structure and diversity for both species. Of note, there is a lock and dam between two of the Ohio River sites. Significant differentiation (p = 0.008) was found between the northern and southern sites on the Wabash Rivers for channel catfish. We will use the pattern of genetic differentiation and diversity to infer population structure with a specific focus on assessing the difference between a free flowing system and an impounded system on gene flow. Additionally, we will compare estimates of genetic diversity among sites and rivers. The presence of genetic differentiation may provide vital information for managing these commercially and recreationally exploited species.

Tuesday January 26, 2016 10:40am - 11:00am EST