Choke Canyon Reservoir 2011 Survey Report media download(PDF 2.6 MB)

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Choke Canyon Reservoir - 2011 Survey Report

Prepared by Greg Binion and John Findeisen
Inland Fisheries Division
District 1-E, Mathis, Texas

This is the authors' summary from a 37-page report. For a copy of the complete report, use the download link in the sidebar.

Fish populations were surveyed using electrofishing (2008, 2009, 2010 and 2011), trap nets (2007, 2009 and 2011) and gill nets (2009, 2010, 2011 and 2012) to assess population trends for important sport fish communities. A creel survey was conducted during the survey period spanning 1 June 2008 to 31 May 2011. This report summarizes the results and contains a management plan for the reservoir based on those findings.

Reservoir Description

Choke Canyon is a 25,989-acre reservoir (averaged 19,975 acres in 2011- 2012) located on the Frio River in the Nueces River Basin, approximately 80 miles south of San Antonio. Its main purposes are for water supply and recreation (angling and pleasure boating). The reservoir has a history of substantial water level fluctuations. The substrate is composed primarily of silt, sand, clay, and some gravel/rock. Littoral habitat consists of native aquatic vegetation, periodically flooded terrestrial vegetation, standing timber, and seasonally abundant water hyacinth and hydrilla.

Management History

Important sport fish species include largemouth bass, blue and channel catfish, white bass, and white crappie. Recent management efforts have focused on control of nuisance aquatic vegetation, collecting catch and harvest statistics on important sport fish species, documenting catch of trophy largemouth bass, and supplementing the naturally occurring largemouth bass population through stockings in 2009 thru 2011. The district has worked with the city of Corpus Christi to develop and implement a water hyacinth control program. District staff conducted herbicide treatments on water hyacinth in 2008 (195 acres), 2009 (80 acres), 2010 (525 acres) and 2011 (45 acres). Staff annually monitored access areas where hydrilla could restrict use. Angler harvest of all sport fishes has been regulated according to statewide size and bag limits.

Fish Community

Management Strategies

Sport Fish Restoration Logo

Performance Report as required by Federal Aid in Sport Fish Restoration Act Texas Federal Aid Project F-221-M-2 Statewide Freshwater Fisheries Monitoring and Management Program