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Tuesday, January 30 • 6:00pm - 9:00pm
Poster Display. A Comparison of Autumn Electrofishing and Autumn Fyke Nets for Sampling Bluegill and Redear Sunfish Populations

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AUTHORS: Ben C. Neely, Connor J. Chance-Ossowski, Jeff D. Koch - Kansas Department of Wildlife, Parks, and Tourism

ABSTRACT: Fyke nets are commonly used to sample Bluegill Lepomis macrochirus and Redear Sunfish L. microlophus in lotic systems. However, relative abundance estimates from fyke net samples are frequently imprecise and limit inference that can be drawn about the sampled population. We compared relative abundance estimates and associated precision from samples collected with autumn fyke nets and autumn electrofishing at 12 small Kansas impoundments to better understand equipment limitations and refine sampling protocols. Catch-per-effort (CPE) of Bluegill varied from 4.0/net-night (nn) to 67.3/nn (mean=29.3/nn) in fyke nets and 100.0/hr to 691.5/hr (mean=339.4/hr) with electrofishing. Similarly, CPE of Redear Sunfish varied from 1.0/nn to 19.8/nn (mean=11.4/nn) in fyke nets and 7.5/hr to 82.5/hr (mean=49.2/hr) with electrofishing. Relative standard error (RSE) of Bluegill CPE varied from 14% to 97% (mean=46%) in fyke nets and 8% to 27% (mean=17%) with electrofishing. Relative standard error of Redear Sunfish CPE varied from 20% to 73% (mean=54%) with fyke nets and 18% to 40% (mean=30%) with electrofishing. These results indicate that autumn electrofishing might be preferable to autumn fyke nets for sampling Bluegill and Redear Sunfish when precise relative abundance estimates are desired.

Tuesday January 30, 2018 6:00pm - 9:00pm CST
Ballroom C & Foyer

Attendees (5)