TPWD 1964 F-2-R-11 #936: Fisheries Resurvey of Inks Lake, Job Completion Report, Project F-2-R-11
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JOB COMPLETION REPORT
As required by
FEDERAL AID IN FISHERIES RESTORATION ACT
TEXAS
Federal Aid Project No. sz-R-ll
FISHERIES INVESTIGATIONS AND SURVEYS OF THE WATERS OF REGION II — B
Job No. 3-24: 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 Direeoer for Wildlife
z .3' _-
g. rm. 1. 2-: ;
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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.
JOB COMPLETION REPORT
State of Texas
Project No. F-2-R-ll Name: Fisheries Investigations and
Surveys of the Waters of Region II—B
Job No. 8-24 Title: Fisheries Resurvey of Inks Lake
Period Covered: February 1, I963 - 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—l4, 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.
SeinencoiLeCEions 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.
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 dbminate 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 BO 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, aspecies 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 9f ScPence 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 9f
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 1% - 3 pound class. The average weight of the largemouth bass taken was 1.08
pounds. This compares favorably with the average weight, 0.92 pounds, of the species
taken in the previous segment. Mbst of the bass collected during the project period
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
Leader
Date be 20, 1964 JOHN E. TILTON
Regional Supervisor
_ 4 _
TABLE 1
INKS LAKE
(A checklist of species mentioned in the report)
SCIENTIFIC 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
Nflcropterus treculi
Micropterus salmoides
Chaenobryttus gulosus
Lepomis cyanellus
Lepomis microlophus
Lepomis macrochirus
Lepomis humilis
Lepomis megalotis
Pomoxis annularis
Percina caprodes
Etheostoma spectabile
Aplodinotus grunniens
COMMON NAME
Longnose gar
Gizzard shad
Smallmouth buffalo
River carpsucker
Carp
Golden shiner
Spottail shiner
Redhorse shiner
Channel catfish
Black bullhead catfish
Flathead catfish
Mbsquitofish
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
TABLE’2
INKS LAKE
Netting Results, 1963
PER CENT WEIGHT PER CENT
SPECIES NUMBER BY NUMBER LBS. BY WEIGHT
Longnose gar 34 1.80 148.34 8.78
Gizzard shad 816 43.11 442.77 26.20
Smallmouth buffalo 87 4.60 275.46 16.30
River carpsucker 58 3.06 167.35 9.90
Golden shiner l 0.05 0.23 0.01
Carp 31 1.63 94.28 5.58
Channel catfish 88 4.65 129.37 7.66
Black bullhead catfish 10 0.53 2.79 0.16
flathead catfish 8 0.42 34.57 2.05
White bass 125 6.60 151.79 8.98
Texas spotted bass 9 0.48 6.62 0.39
Largemouth black bass 123 6.50 133.06 7.88
Warmouth bass 46 2.43 10.95 0.65
Green sunfish 58 3.06 8.60 0.51
Redear sunfish 28 1.48 6.15 0.36
Bluegill 230 12.15 28.45 1.68
Orangespotted sunfish 1 0.05 0.13 0.01
Longear sunfish 39 2.06 3.92 0.23
White crappie ' 90 4.75 21.63 1.28
Freshwater drum 11 0.58 23.13 1.37
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