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Tuesday, January 29 • 10:40am - 11:00am
(FISHERIES: LAKES & RESERVOIRS) Age and Growth of Blue Catfish in Two North-Central Kansas Reservoirs

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AUTHORS: Ernesto Flores, Kansas Department of Wildlife, Parks, and Tourism; William J. Stark, Fort Hays State University

ABSTRACT: Age information is a management tool used by fisheries biologists to characterize populations. The Blue Catfish (Ictaluris furcatus) is a riverine species that grow to trophy lengths and have been introduced into Kansas Reservoirs. Blue Catfish were introduced into Wilson Reservoir in 2006 and Lovewell Reservoir in 2010 with a common management objective, establishing a trophy fishery. Standard sampling protocol (SSP) has misrepresented the Blue Catfish population status in both reservoirs; a targeted sampling effort was conducted in the summer of 2016 in Lovewell Reservoir using low-pulse electrofishing and in 2017 using float-lines to gain insight on the population structure. A total 170 fish were collected from Wilson Reservoir with a TL ranging 210-860 mm. We sampled Lovewell Reservoir and collected 146 individuals ranging from 220-860 mm. Pectoral spines were collected from each individual and used for aging. Annual stockings were scheduled for Lovewell reservoir from 2010-2014 approximately at 1 fish/acre excluding the year 2013 stocking at 0.33 fish/acre. Age 6 fish comprised 52% of the sample, 2% at age 5, 13% age 4, 3% age 3, 23% age 2, and 4% age 1. Wilson Blue Catfish stocking rates were conducted at 2 fish/acre in 2006 and 2008; stocking rates were 1 fish/acre in 2007, 2010, 2011, 2012, 2013, 2014, and 2016. Age 11 fish made up 13% of the sample, age 10 at 49%, 36% were age 9, and 7% age 1. Age classes 2, 3, 4, 5, 6, and 7 were not represented in the sample. Detection of these missing year classes may have been caused by low lake levels during this time period.

Tuesday January 29, 2019 10:40am - 11:00am

Attendees (8)