TPWD 1968 F-2-R-15 #1192: Fisheries Resurvey of Lake Lyndon B. Johnson: Job Progress Report, Project F-2-15

JOB PROGRESS REPORT As required by FEDERAL AID IN HISHEEIRES RESTORATION ACT TEXAS Federal Aid Project No. F-2-15 REGION 2-B FISHERIES STUDIES Job No. B—24: Fisheries Resurvey of Lake Lyndon B. Johnson Project Leader: Richard L. White J. R. Singleton Executive Director Texas Parks and Wildlife Department Austin, Texas Marion Toole Eugene A. Walker D-J Coordinator Director, Wildlife Services November 13, 1968 Job Progress Report State of Texas Project No. Fw2-15 Name: Region 2~B Fisheries Studies Job No. 3—24 Title: Fisheries Resurvey of Lake Lyndon B. Johnson Period Covered: February 12 1967 to January 31: 1968 Objectives: To analyze and evaluate for possible publication (other than a Job Progress Report) data collected under Job 3-24, F-2-12, F—2-13 and F-2-14. Procedures: Published literature was screened regarding the effect of commercial fishing on fishery complexes in freshwater lakes. Data obtained during 3 segments of work were reviewed and evaluated for publication as an Inland Fisheries Bulletin. Findings: Although data indicated that a population change (a shift in smallmouth buffalo" river carpsucker ratio) occurred during the commercial netting of Lake Lyndon B. Johnson, it was felt by project personnel that additional data should be collected over a 3-year post-commercial netting period. This control period colleCtion of data would determine whether the population changes were permanent or if the fish populations returned to the pre-netting state. This information was felt to be necessary for an accurate analysis of the effects of commercial netting. The job was amended to postpone publi- cation of this study until all of the data had been collected. Prepared by: Richard L. White Approved by: 2; :W JM/é Project Leader Coordinator Date: November 13: 1968 FRED G. LOWMAN Inland Fisheries Supervisor