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Welcome to the interactive web schedule for the 2019 Midwest Fish & Wildlife Conference! The schedule is subject to change (as of November 20, 2018). Please check back for updates. To return to the main Conference website, go to: www.midwestfw.org.

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Monday, January 28 • 11:20am - 11:30am
(FISHERIES: LIGHTNING TALK) Demographics of a Healthy Population of Blue Suckers, Cycleptus elongatus, in an Unimpounded Midwest River

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AUTHORS: Dakota Radford, Cassi Moody-Carpenter, Robert Colombo – Eastern Illinois University

ABSTRACT: Blue Suckers, Cycleptus elongatus, in the Wabash River bounding southern Illinois from southern Indiana are one of few persisting healthy and readily surveyable assemblages of this species. Understanding the demographics of this population is an important measure to inform the conservation of a species critically imperiled in much of its range. We used nine years of Blue Sucker samples (n=431) collected via randomized DC electrofishing sampling for a long-term Wabash River fish monitoring program to draw conclusions about population density, size structure, and habitat selection. We computed condition and significant species co-occurrence, and compared CPUE across sampling periods. We identified dominant size classes at 601-650mm total length (25.1%) and 651-700mm total length (27.6%) based on samples ranging from 66-775mm (mean 617.0mm). In-progress research includes a comparison of conflicting methods and results for Blue Sucker aging, a morphological comparison and histological study of Blue Sucker gonads, and genetic analysis using microsatellite loci to compare heterogeneity against geographic distance. It is the goal of this research to inform Blue Sucker assessment methods and management of this declining species by enhancing our understanding of functional Blue Sucker populations, and to provide a snapshot of a healthy assemblage of this species.

Monday January 28, 2019 11:20am - 11:30am
VETERANS MEETING ROOM A/B

Attendees (1)