TPWD 1970 F-2-R-17 #1351: Productivity Study of the Fishery of the San Marcos River: Job Progress Report, Federal Aid Project F-2-R-17

--- Page 1 --- JOB PROGRESS REPORT [E | li E Uy t as required by FEDERAL AID IN FISHERIES RESTORATION ACT TEXAS Federal Aid Project No. F-2-R=17 REGION 2-B FISHERIES STUDIES Job No. E=8: Productivity Study of the Fishery of the San Marcos River Project Leader: Robert L. Bounds J. R. Singleton Executive Director Texas Parks and Wildlife Department Austin, Texas Marion Toole : Eugene A. Walker ‘ De-J Coordinator Director, Wildlife Services September 24, 1970 --- Page 2 --- 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. --- Page 3 --- JOB PROGRESS REPORT vtate of TEXAS Name: Region 2-B Fisheries Studies Project No. F=2-R-17 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 2-B 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 1 of this report and will be incorporated in the segment 18 progress report. Recommendations 3 Lt is recommended that this job be continued so that those objectives not attained during this segment be completed during the next segment. se. nple Prepared by: Robert L. Bounds Approved by: VO ppegn J € Project Leader Coordinator Dates: September 24, 1970 . Richard L. White Inland Fisheries Supervisor --- Page 4 --- Tes LeL etl c6 OOT 672€ 808 8LZ 91 LEE C&S 892 6ST TeIOL, 6¢ LE 16 6T val OS 02 ev 662 98T 67 0 Xe) ystTzung TI ct LE él ST BE oO wt OO st re isa) sseg yjnowsesze7 sseg paqjods ysty3ep peeyiela ystyqe9 peeyting a tt ystz3e9 peuueyo ~ dae) - 861 - 069 - ¢ - 9 - 9lz - €€y - 02 - SOE 6 O€ Ol 91 w ?) us) 5 io) & ins < ® Pa [ary 10) jan n =a e fo) 2] 5 a a 1) 0) ® icp} Gc oO 0. @ Kw aeyonsdieg AsATtTyY €1 val Q qnoal GLZ GZ 62 TE BE G6¢ vE GE ccl VE peus 17 er4 ae) ssousuo 7, col Ze) pajjods 02 0¢ 0¢ O¢ 02 0Z 0% 0% OZ 0% OT OT iw el w rei puoses/sasjng SNOILVA4dO ONIHSTAOULOaATA FO AMVWWNS T dldvi S°S eseraoduy ™ OST OST Set GL OOT OOT OST OST OST OST OST oO wy ei aZeLLOA OTE OTE OSS GL6 OSS OSS OTE OTE OTE OLE OSV OS j=) Oo wt j=) Oo st (soywozo Tw) aouejoONpuo7D G°T S°T 99° O°T 99° G*T 0°T G°Z (sanoy) aut] uoTIersUAay yewo) yeuo) seseduey seseduery] seseduey] seseduey Tew) [ewo) TewoD yewo) OT qaTy eT quate a1quTy eTqUTy Aquno) adnjtepeny adnytepeny seseduey seseduey seseduey sepseduey adnpepeny adnyepeny adntepeny adnyepeny 4ysoa9 paeusen yaar paeuken, oueTT oueTT waysks JaATY Z a YySZIN Zo Aeg 61/S 69 61/S 69 €T/S 69 ET/S 69 Z1/S 69 ZT/S 69 9/¢ 69 ez/¥7 69 82/7 69 8z/¥ 69 t/? 69 €/% 69 c/¥ 49 Z/¥ 37e¢ --- Page 5 --- Date 6/6 69 5/6 69 9/23 69 9/24 69 12/16 69 12/16 69 12/17 co Day or Night i] N ver System ord a4 Guadalupe Guadalupe Guadalupe Guadalupe Guadalupe Guadalupe Guadalupe County Comal Comal Kerr Kerr Comal Comal Comal Totals Time ¢ Generation (Hours) Zu 1.00 Led 2.9 1.0 28.45 ponene anes Ww me j=) 310 390 335 335 335 335 uw Voltage pe js) 140 150 150 175 50 w Amperage Pulses/second ) js) NO oO L5 20 16 14. 20 TABLE 1 (Cont.) SUMMARY OF ELECTROFISHING OPERATIONS Spotted Gar 0 wi o oO v n ° GS fol) wT G fs) (a) <a eI n 2 54 11 29 - 72 - 146 - 45 1 33 - 89 103 1386 u co) ol [s) 3 n a. u is) oO bow 3 ca) 6 > So ocrd BE 3 421 13 8 - i - 3 53 42 Grey Redhorse Sucker ce 7a] oo oa] 11 16 14 110 24 2444 - Spotted Sucker 19 . Carp 0 30 Catfish Bullhead Catfish Channel — ~ 37 i] Flathead Catfish — Spotted Bass = (a) 19 Largemouth Bass 262 Sunfish 52 24 19 2 Total 370 105 86 217 92 181 115 1145 5553