TEXAS 

 Game and Fish Commission 



1. Fisheries Investigations and Surveys 



Basic surveys to obtain physical, chennical, and biological data, fish 

 populations characteristics, and pollution sources are conducted throughout 

 the State. Experimental control of rough fish and aquatic weeds is also 

 carried on. 



Statewide; began February 1956, indefinite; $28,681; Kenneth Jurgens, 

 Leo D. Lewis, E. W. Bonn, Lawrence Campbell, Leonard Lamb; Charles Gray, 

 Elgin M. C. Dietz, Alvin Flury, and Billy D. Cooper, Leaders; reports avail- 

 able. 



Address inquiries to: Kenneth Jurgens, Game and Fish Commission, 

 Walton State Building, Austin, Texas. 



2. Caddo Lake Water Hyacinth Control Project 



A development job carried out during the fiscal year was the Caddo Lake 

 water hyacinth control project. Water hyacinths have covered from 1, 500 to 

 2, 000 acres of Caddo Lake in the past four or five years causing much of the 

 lake to be innpassable to boats. These plants were sprayed with 40 percent 

 Amine 2,4-D and emulsifiable oil. Spraying is being continued at the present 

 time. 



Marion and Harrison Counties; began April 1956, closed November 1956; 

 $20,219; Charles E. Gray, Leader; reports available. 



Address inquiries to: Charles E. Gray, Box 8, Marshall, Texas. 



3. Statewide Rough Fish Control 



Lake Inks, a lake of approximately 850 acres, was treated with Pro- 

 Noxfish in an attempt to innprove fishing by reducing gizzard shad. The lake 

 was treated at the rate of 0. 12 p. p. m. Pro-Noxfish in shallow water and at 

 0. 13 p. p. m. in water over 10 feet in depth. In the deeper water, only the 

 upper 10 feet of the lake was treated. 



Statewide; began November 1956, to close October 1957; $7,475; Regional 

 Biologists, Leaders; reports available. 



Address inquiries to: Marion Toole, Game and Fish Commission, Walton 

 State Building, Austin, Texas. 



U. S. Fish and Wildlife Service, Branch of Game-fish and Hatcheries 



1. Modified Production System - Warm Water Species 



Artificial feeding in lieu of fertilization, grading, and other production 

 methods are being applied to largemouth bass, redear, and channel catfish in 

 ponds and raceways. 



San Marcos; began July 1956, continuing; $3,000; Fred Richan, Leader. 



Address inquiries to: Regional Director, U. S. Fish and Wildlife Service, 

 P. O. Box 1306, Albuquerque, New Mexico. 



U. S. Fish and Wildlife Service, Office of River Basin Studies 



Silt Problem in Sabine Lake 



The purpose of this investigation is to determine the benefits to the fish re- 

 sources of the Sabine Lake area if silt dredged from the Sabine-Neches and Port 

 Arthur Waterways is kept from entering Sabine Lake. Field work consists of 

 determining man-day use nnade of the lake and harvest. Data are gathered on 

 the sources and types of pollution, chemical, and biological analysis of the 

 lake's water, and physical description of the project area. 



127 



