TPWD 1964 F-2-R-11 #936: Fisheries Resurvey of Inks Lake: Job Completion Report, Federal Aid Project F-2-R-11

--- Page 1 --- JOB COMPLETION REPORT As required by FEDERAL AID IN FISHERIES RESTORATION ACT Federal Aid Project No. F-2-R-11 FISHERIES LINVESTIGATLONS AND SURVEYS OF THE WATERS OF REGION IL Job No. B-24: Fisheries Resurvey of Inks Lake Project Leader: R.L. White J. Weldon Watson Executive Director Texas Parks and Wildlife Department Austin, Texas Marion Toole Eugene A. Walker D-J Coordinator Assistant Director for Wildlife --- Page 2 --- ABSTRACT Inks Lake was resurveyed during the segment. All of the data collected indicates that the largemouth bass population of Inks Lake is improving in both number and individual size. Seining collections revealed a high rate of survival of Largemouth bass through the fingerling stage. Tidewater silversides, Menidia beryllina, were collected on Lake Inks for the first time. The resurvey will be continued to further evaluate the results of the selective treatment of the Lake. --- Page 3 --- JOB COMPLETION REPORT State of Texas Project No. _F-2-R-11 Name: Fisheries Investigations and Surveys of the Waters of Region II-B Job No. B-24 Title: Fisheries Resurvey of Inks Lake Period Covered: February 1, 1963 - January 31, 1964 Objectives: 1. To determine the fish species present in Inks Lake and their relative abundance. 2. To determine particularly the relative abundance of Largemouth bass following the massive stocking of 1958 through 1962. 3. To determine if the largemouth bass is reproducing in Inks Lake. Procedure: Physical data for Inks Lake, located in Burnet County, is available under Job B-14, F-2-R-3 (Basic Inventory). One hundred and twenty-two netting collections were made on Inks Lake at stations established during the basic survey. Experimental gill nets, 125 feet long were employed in this survey. These nets consist of five 25 foot sections ranging between one inch and three inch square mesh, increasing in size by one-half inch per section. Except for January 1964, net sets were made each month of the segment. Plans called for the use of SCUBA equipped divers to locate bass nests and nesting activity. Because of the shortage of man-power and the inexperience of pro- ject personnel in diving, this work was limited. Visual observations from a boat were made to detect any evidences of bass spawning activity. Seingiucotbectitons were made in an attempt to pick up bass fry and fingerling. The collections, at special seining stations, were to be made bi-weekly, but again, a man-power shortage limited this work, Water samples were taken monthly and ana- lyzed for 02, C02, total hardness, chlorides, and pH. A checklist of the fish species mentioned in this report is given in Table l. --- Page 4 --- Findings: Netting collections for the project period are summarized in Table 2, and the netting summaries by month are illustrated in Table 3. As can be seen in the tables, rough fish dominate the catch. The per cent of rough fish by weight and number, determined by experimental netting since 1955, is given in the chart below, INKS LAKE ROUGH FISH RATIO, 1955 - 1963 1955 1956 1957 1958 1959 1960 1961 1962 1963 Per cent rough fish (number) 63 78 63 71 65 70 73 56 55 Per cent rough fish (weight) 74 74 78 71 74 79 85 80 68 As can be seen from the above chart, rough fish still hold a decided edge in the percentages, but both figures are at their lowest level in nine years. Seining collections revealed a high percentage of largemouth black bass in most instances. A good survival rate of bass in both the fry and fingerling stage was noted in the seining collections. Gizzard shad were collected in the seine sampling, but not in the abundance noted in previous years. Tidewater silversides, Menidia beryllina, agecies previously unrecorded for Inks Lake or any of the other lakes of the Highland Chain of the Colorado River, were collected in large, numbers in the seine samples. An Article was submitted to the Texas Journal of Sc¥ence to officially record the presence of the silversides in Inks Lake. Identification of the tidewater silversides was verified by Dr. Clark Hubbs, of the University of Texas Zoology Department and author of A Checklist of Texas Fresh-Water Fishes. Results of seine sampling are given in Table 4. Water quality tests revealed no unusual readings, Table 5. No past records of water analysis on Inks Lake were available for comparison with the readings ob- tained during this segment. Recommendations: Despite the seemingly high numbers of gizzard shad and other rough fish species, the Largemouth bass population on Inks Lake is improving in both number and condition of fish. Statistics, for the past five years, on largemouth bass collected by netting operations on Inks Lake are given in Table 6. As can be seen there has been a marked increase in each category between 1959 and 1963. More and larger bass were collected during the project segment than in the previous five years. Of the 120 largemouth bass taken in netting samples, 32 specimens or 27% were in the 14 - 3 pound class. The average weight of the largemouth bass taken was 1.08 pounds. This compares favorably with the average weight, 0.92 potinds, of the species taken in the previous segment. Most of the bass collected during the project period --- Page 5 --- were in excellent condition; the average K factor or coefficient of condition of the species was 2.62. Although a creel census was not taken on Inks Lake, fishermen reported good fishing over the entire lake. The massive stocking of Inks Lake with largemouth black bass following the chemical reduction of gizzard shad, and the apparently good bass spawns during the two years succeeding the treatment had alleviated somewhat the critical bass situation on Inks Lake. From all the data collected, the largemouth bass population is greater than in any year in the previous eight years. The effect of the tidewater silversides in Inks Lake had not yet been determined. The rapid rate of reproduction of the species as well as its use as a food fish for largemouth bass may be a key factor in the improved bass population of the lake. Although the foregoing is a supposition on the part of project personnel, the silver- sides will be watched closely in future work to determine the effect, if any, on the largemouth bass population. It is recommended that this job be continued to further evaluate the results of the selective kill and the massive stocking of largemouth bass on Inks Lake. Prepared by _R.L. White Approved by #4/4-r*t-it Leader Date May 20, 1964 JOHN E. TILTON Regional Supervisor --- Page 6 --- ~ ke TABLE 1 INKS LAKE (A checklist of species mentioned in the report) SCIENTIFIC NAME COMMON NAME Lepisosteus osseus Dorosoma cepedianum Ictiobus bubalus Carpiodes carpio Cyprinus carpio Notemigonus crysoleucas Notropis venustus Notropis lutrensis Ictalurus punctatus Ictalurus melas Pylodictus olivaris Gambusia affinis Menidia beryllina Roccus chrysops Micropterus treculi Micropterus salmoides Chaenobryttus gulosus Lepomis cyanellus Lepomis microlophus Lepomis macrochirus Lepomis humilis Lepomis megalotis Pomoxis annularis Percina caprodes Etheostoma spectabile Aplodinotus grunniens Longnose gar Gizzard shad Smallmouth buffalo River carpsucker Carp Golden shiner Spottail shiner Redhorse shiner Channel catfish Black bullhead catfish Flathead catfish Mosquitofish Tidewater silversides White bass Texas spotted bass Largemouth black bass Warmouth Green sunfish Redear sunfish Bluegill sunfish Orange spotted sunfish Longear sunfish White crappie Logperch Orangethroat darter Fresh water drum --- Page 7 --- SPECLES Longnose gar Gizzard shad Smallmouth buffalo River carpsucker Golden shiner Carp Channel catfish Black bullhead catfish ‘Lathead catfish White bass Texas spotted bass Largemouth black bass Warmouth bass Green sunfish Redear sunfish Bluegill Orangespotted sunfish Longear sunfish White crappie Freshwater drum TOTALS TABLE 2 INKS LAKE Netting Results, 1963 PER CENT NUMBER BY NUMBER 34 1.80 816 43.11 87 4.60 58 3.06 l 0.05 31 1.63 88 4.65 10 0.53 8 0.42 125 6.60 9 0.48 123 6.50 46 2.43 58 3.06 28 1.48 230 12.15 1 0.05 39 2.06 90 4.75 11 0.58 1,893 WEIGHT LBS. 148.34 442.77 275.46 167.35 0.23 94.28 129.37 2.79 34.57 151.79 6.62 133.06 10.95 8.60 6.15 28.45 0.13 3.92 21.63 23413 1,689.59 PER CENT BY WEIGHT 8.78 26,20 16.30 9.90 0.01 5.58 7.66 0.16 2.05 8.98 0.39 7.88 0.65 0.51 0.36 1.68 0.01 0.23 1,28 1.37 --- Page 8 --- S9°e 70°T LI° zs°0 To's 00°O 70°T To°s 00°0 00°0O LLE*9 LEG SES? 00°0 % *D0q eT 68 “ON 6L°T 4 sy°o TT os*s €T 00°O O Z9°ST SE 00°0 O 00°O0 O 94° OT 00°0 O 00°0 O ere OL ere 2 eles 6TT 00°O ‘0 % “ON *AON 61°? 00°0 0 L8°et €L°0 78°S 68 It’s 6 o9°y7T 02 €Z°O 3=OiT c6°C) oY f6°S €L°0 Ooi S9o°€e S BE°7 869 00°O0 =8=6—O 78°S 68 78°S 68 86°8T 92 oo°a = 60 % “ON #300 O6°TT ¥T 00°O GS°S ove 7 os°s on 00°0 860 Oov°e 4 00°O O° 00°a:. 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