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The following schedule is subject to change (as of October 11, 2016). Please check back for updates. For more information about this meeting, go to: www.seafwa.org/conferences/2016
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Tuesday, October 18 • 1:20pm - 1:40pm
Fisheries. Population Characteristics of Channel Catfish from Toledo Bend Reservoir, Louisiana

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AUTHORS: Sean Kinney, Bobby Reed - Louisiana Department of Wildlife and Fisheries

ABSTRACT: Channel catfish (Ictalurus punctatus) were studied on Toledo Bend Reservoir from 2008 to 2010 with vertically set hoop nets to better understand population characteristics. The length and age at which 50% of the specimens have achieved sexual maturity (M50) was estimated for both sexes and was similar to other studies from Louisiana (male total length (TL) = 274 mm, age = 3+) (female TL = 279 mm, age = 3+). Relative weight (Wr) for all but the largest of catfish sampled was poor. This was attributed to excess competition of the size class 228 to 330 mm TL. Gonad somatic indices (GSI) for females showed the highest proportion of body weight designated to reproduction was found in the month of June. Estimates of total annual mortality (80%), natural mortality (62%), and fishing mortality (20% - commercial gear only) were estimated using catch curve analyses and were within the range of results reported in the literature. Yield per recruit was maximized when natural mortality was high, exploitation was low, and minimum length limit was below 228 mm (9 inches). Results indicated that channel catfish in Toledo Bend Reservoir exhibit the characteristics of a stunted population. Increased commercial harvest is suggested to reduce competition and increase yield per recruit.

Tuesday October 18, 2016 1:20pm - 1:40pm
Riverview A

Attendees (6)