Marble Falls Reservoir - 2005 Survey Report
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Prepared by Marcos J. De Jesus and Stephan J. Magnelia
Inland Fisheries Division
District 2-C, San Marcos, Texas
This is the authors' summary from a 22-page report. For a copy of the complete report, use the download link in the sidebar.
Fish populations in Marble Falls Reservoir were surveyed in 2005 using electrofishing and in 2006 using gill nets. This report summarizes the results of the surveys and contains a fisheries management plan for the reservoir based on those findings.
Marble Falls Reservoir is a 573-acre stable level impoundment of the Colorado River, located in the City of Marble Falls, Burnet County, TX. It was constructed in 1951 by the Lower Colorado River Authority (LCRA) for purposes of hydroelectric power, recreation and water supply. The reservoir is riverine in nature with a limited number of coves and creeks. The reservoir area represents a geological transition between granite outcroppings and limestone formations of the Edwards Plateau, and its shoreline length is approximately 12 miles. The majority of the shoreline is private; however, one public boat ramp is available.
Important sport fish include largemouth bass, Guadalupe bass and catfish species. The Florida subspecies of largemouth bass was stocked in Marble Falls Reservoir in 1999 to increase Florida bass genetic influence.
- Prey species: Gizzard shad, bluegill, and redbreast sunfish were the dominant prey species available.
- Catfishes: Channel catfish were the dominant species present, but were present in low density. Flathead catfish were also present in low density.
- Black basses: Largemouth bass were abundant. Growth rates have improved since the last survey. Electrofishing CPUE14 and RSD14 have improved since 1997. Guadalupe bass were also present at low densities.
The reservoir should continue to be managed with existing fishing regulations. The catfish and largemouth bass fisheries should be promoted. Conduct general monitoring with gill nets and electrofishing surveys in 2009 – 2010. Conduct aquatic vegetation survey in 2009.
Performance Report as required by Federal Aid in Sport Fish Restoration Act Texas Federal Aid Project F-30-R-30 Statewide Freshwater Fisheries Monitoring and Management Program