Amistad Reservoir 2011 Survey Report media download(PDF 574.6 KB)

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Amistad Reservoir - 2011 Survey Report

Prepared by Randy Myers and John Dennis
Inland Fisheries Division
District 1-D, San Antonio, Texas

This is the authors' summary from a 40-page report. For a copy of the complete report, use the download link in the sidebar.

This report summarizes results of surveys conducted from July 2008 to June 2012 and contains a management plan for the reservoir. Fish populations were surveyed using electrofishing and gill nets. A six-month duration creel survey and two vegetation surveys were also conducted.

Reservoir Description

Amistad Reservoir is a 63,680 acre impoundment on the Rio Grande River. It was constructed in 1969 and managed by the International Boundary and Water Commission to provide water for irrigation and hydro-electric power generation. During the study period, water level increased from 20 feet low, remained within 5 feet of full pool for about three years, then decreased to about 20 feet low. Abundance of submersed aquatic vegetation declined substantially during the study period. Boat and angler access is excellent; the National Park Service (NPS) maintains 11 public boat ramps.

Management History

Important sport fishes include largemouth bass, catfishes, striped bass, and white bass. Striped bass were stocked in most years since 1974. Florida largemouth bass (FLMB) were stocked periodically from 1975 to 2006 and annually since 2008 to improve FLMB introgression and trophy largemouth bass potential. Angler harvest of all sport fishes has been regulated according to statewide size and bag limits. Since 2004, the NPS has regulated largemouth bass tournaments via a tournament permitting program.

Fish Community

Management Strategies

Continue to provide a striped bass fishery supported by annual stockings. Continue stocking Florida largemouth bass on an annual basis to maintain high Florida bass introgression and production of trophy fish.

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