TPWD 1970 F-2-R-17 #1351: Productivity Study of the Fishery of the San Marcos River: Job Progress Report, February 1, 1969 to January 31, 1970

JOB PROGRESS REPORT F u [E E .J . as required by FEDERAL AID IN FISHERIES RESTORATION ACT TEXAS Federal Aid Project No. F~2wR~l7 REGION 2mB FISHERIES STUDIES Job No. Em8: Productivity Study of the Fishery of the San Marcos River Project Leader: Robert Lo Bounds J. R0 Singleton Executive Director Texas Parks and Wildlife Department Austin» Texas Marion Toole ' Eugene A. Walker £ DmJ Coordinator Director, Wildlife Services September 24, 1970 ABSTRACT ': Electrofishing techniques and sampling site locations were the primary objectives of this segment of the job. However, personnel adjustments impeded the progress of the study. Although some electrofishing techniques were developed and new personnel obtained experience in the Operation, it is felt that insufficient data has been collected to date. Therefore this particular facet of the study will be continued in the next segment. JOB PROGRESS REPORT state of TEXAS Name: Region 2-B Fisheries Studies Project No. Fw2-R-l7 Title: Productivity Study of the Fishery of the San Marcos River Job No. E-8 Period Covered: February 1, 1969 to January 31, 1970 Objectives: 1. To relocate the study area to a more suitable site. 2. To determine the most efficient population estimate method through electro- fishing techniques. Procedures: Twelve potential study sites were electrofished in an effort to determine maximum efficiency of the electrofishing equipment. Time of day or night, length of time, specific conductance, species and number of fish collected, voltage, amperage and pulse frequency was recorded for each unit of Operation. Findings: The first portion of this segment was spent attempting to locate an area in nich to conduct this job and to further develop electrofishing techniques. Twelve sites on 6 streams in Region ZEB were surveyed for possible use before personnel changes within Project F-2 caused a virtual standstill on this job. The Project Leader, primary investigator for this job, was promoted to a Regional Supervisor position and one of the Assistant Project Leaders resigned his position. This left only one person with electrofishing experience on the Project, therefore, most of the objectives for this segment were not attained. The 12 sites tested during this segment were subjected to 21 units of electro- fishing for a total of 28.45 hours which produced 5553 fish of 14 different species. During these tests valuable electrofishing experience was gained and possibly the best electrofishing techniques were develOped, but the data collected is incomplete and further testing will be necessary before a primary study area can be designated and a comprehensive report can be made. No attempt will be made to elaborate on the inconclusive data collected during this segment, but it is presented in Table l of this report and will be incorporated in the segment 18 progress report. Recommendations: It is recommended that this job he continued so that those objectives not attained during this segment be completed during the next segment. , ' t /M Prepared by: “Egbert L._Boundsjj Approved by: );2b72;ivht1}¢1,,z’ 6. Project Leader 1 h ’ Coordinator ._ ; Richard White. . Inland Fisheries Supervisor Hmm NNN MHH Nm OOH mNm wow wNN OHq Hmm NON wON mmH {9301 ON mm HO OH ca Om as O \D RSEJUHS sseg qJnOmeBaej HH NH NH mH mm ' \O \‘T m ’d' H 0") sseg paqqods RSTJJED PBBHJEIR a H u a me u m H a omo o H m a a B n. H n. n. - a u a m u c mH u o u u a u ohN n N n a mmc a n a a new a a u a mom u H R...- fli nu- ! N n. n. n. a e m m om a a h OH 0H m mo m .m. e at B J o e .L u d 1. .A u. u 1. a e a H B T. D. e D. D. no no u. no a n 0 9 l4 3 J 1 Ta H. s J I. a a I s J S u. 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