Choke Canyon Reservoir 2015 Survey Report media download(PDF 1.2 MB)

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Choke Canyon Reservoir - 2015 Survey Report

Prepared by Greg Binion
Inland Fisheries Division – Corpus Christi District

This is the authors' summary from a 42-page report. For a copy of the complete report, use the download link in the sidebar.

Fish populations were surveyed in 2015 using electrofishing and baited tandem hoop netting, and in 2016 using gill netting to assess population trends for important sport fishes. Anglers were surveyed from 1 June 2015 to 31 May 2016. Historical data are presented with the 2015-2016 data for comparison. This report summarizes the survey results and contains a management plan for the reservoir based on those findings.

Reservoir Description

Choke Canyon is a 25,989-acre reservoir (averaged 13,744 acres in 2015-2016) located on the Frio River in the Nueces River Basin, approximately 80 miles south of San Antonio. Its main purposes are water supply and recreation. 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 consisted 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 catfishes, White Bass, and crappie. Recent management efforts have focused on control of nuisance aquatic vegetation, compiling catch and harvest statistics on important sport fish species, documenting catch of trophy Largemouth Bass, and supplementing the Largemouth Bass population through stockings in 2009-2011, 2013, and 2016. 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), 2011 (45 acres), 2012 (51 acres), and 2015 (30 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-6 Inland Fisheries Division Monitoring and Management Program