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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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Monday, October 17 • 2:20pm - 2:40pm
Fisheries. Spawning at Age of Spotted Seatrout, Cynoscion Nebulosus, in Barataria Bay, Louisiana

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AUTHORS: Erik T. Lang, Chris A. Levron - Louisiana Department of Wildlife and Fisheries

ABSTRACT: Spotted seatrout is a primary target species in the coastal recreational fishery in Louisiana. The most accurate characterization of the spawning stock of a species, uses annual fecundity for each age of that species. Louisiana currently uses the biomass of the adult spotted seatrout population to represent the spawning stock but is now developing a data set of annual fecundity at age. To compile this data set, we assessed age, spawning season duration, spawning frequency, and batch fecundity. Specimens were captured using gill nets and hook and line. Ages for spotted seatrout sampled to date range from one to three years, which restricts our resolution of fecundity at age data. However, there could be a large difference in fecundity from one to three years considering that the average gonadosomatic index (GSI) during spawning months is much higher in age three individuals. Additionally, based on macroscopic staging, the frequency of age three individuals undergoing vitellogenesis is higher than age one or two, suggesting more frequent spawning. Overall, more fish need to be sampled from older age classes and further histological and fecundity work needs to be completed.

Monday October 17, 2016 2:20pm - 2:40pm
Riverview A

Attendees (6)