TPWD 1962 F-2-R-9 #785: Fisheries Resurvey of Lakes Inks and Buchanan: Job Completion Report, Federal Aid Project No. F-2-R-9

--- Page 1 --- ws JOB COMPLETION REPORT As required by FEDERAL AID IN FISHERIES RESTORATION ACT TEXAS Federal Aid Project No. F-2-R-9 FISHERIES INVESTIGATIONS AND SURVEYS OF THE WATERS OF REGION 2-B Job No. B-24 Fisheries Resurvey of Lakes Inks and Buchanan Project Leader: John G. Wood Ass't. Project Leader: Richard L. White H. D. Dodgen Executive Secretary Texas Game and Fish Commission Austin, Texas Marion Toole Eugene A. Walker D-J Coordinator Director, Program Planning April 6, 1962 --- Page 2 --- ABSTRACT Lakes Inks and Buchanan were resurveyed during the segment. Submerged vegetation, notably Myriophyllum sp., continues to be a major problem on Lake Inks. A lake drawdown during February-March, 1962 is scheduled in the hope that the growth will be retarded during the year. Some increase in relative abundance of gizzard shad over previous segments was noted for the lake. This, combined with poor ang- ling success, is responsible for the scheduling of a selective rotenone treatment of Lake Inks during the drawdown mentioned above. Rough fish species (as listed in the body of the report) were found to constitute over 73 per cent of numbers’ and 85 per cent of weight of fish netted in Lake Inks. Rough fish species constituted 80 per cent of number and 86 per cent of weight of fish netted from Lake Buchanan. Despite the large population of rough fish, the lake supports a large sport fishery, with trotlining for the catfishes probably most popular. Evidence of heavy siltation in the upper lake was observed. This job will be continued on Lake Inks to aid in evaluating both the pro- posed selective treatment with rotenone and the experimental removal of rough fish under Job E-6. --- Page 3 --- JOB COMPLETION REPORT State of TEXAS Name: Fisheries Investigations and Surveys of the Waters of Region 2-B. Project No. F-2-R-9 Title: Fisheries Resurvey of Lakes Inks and Buchanan. Job No. B-24 Period covered: February 1, 1961 - January 31, 1962 Objectives: To conduct fisheries resurveys of LakesInks and Buchanan regarding the fish species present, their relative abundance and the ecological factors influencing their distribution. Procedure: Physical and chemical data are available for Lake Buchanan, located in Burnet and Llano counties, under Job B-13, F-2-R-2 and F-2-R-3 (basic inventory), and for Lake Inks, located in Burnet County, under Job B-14, F-2-R-3 and F-2-R-4 (basic inventory). During the period of this resurvey, efforts were made to note physical changes and other factors which might influence fish distributions, movements, spawn- ing activities and angling success on these impoundments. Fish samples were collected with 125 foot experimental gill nets. These nets consist of five: 25-foot sections ranging between one inch and three inches square mesh, increasing in mesh size by one-half inch per section. One hundred such nets, at stations established during the basic inventory, were set on Inks Lake. Sets were made during each month of the segment. Lake Inks netting during 1961 is summarized in Table 1. Netting summaries by month are shown in Tables 2 and 3. A total of 154 experimental nets were randomly set on Lake Buchanan. An effort was made to get lake coverage by dividing the lake into lower, middle and upper sections, and alternately netting within these areas. Sets were made during each month of the segment, except December, but including January of the preceding seg- ment. A summary of this netting is given in Table 4. Monthly netting summaries are shown in Tables 5 and 6. Netting success in terms of number and pounds of fish per foot of net set is presented in Table 7. A checklist of species mentioned in this report is given in Table 8. The tables included in this report were compiled from data sheets on which iden- tifications, weights, measurements, and gonadal development were recorded in the field. --- Page 4 --- Discussion: Lake Inks Lake Inks has been netted extensively by project personnel during the past three years. This was done following heavy 1957 floods to obtain data which could be com- pared to the basic inventory data. It was continued as part of the evaluation of a restocking program and a proposed selective shad kill. The shad kill was cancelled due to high water on Lake Buchanan immediately above. The Inks resurvey was continued through the past segment as a part of the evaluation of Job E-6 (rough fish removal) which was begun last year. Despite restocking attempts, largemouth bass fishing has steadily declined during the past few years. White crappie fishing is practically non-existent. Both channel: and flathead (yellow) catfish are taken in fair numbers, and white bass fishing is good seasonally. Submerged vegetation, principally Myriophyllum sp., complicates efforts to fish Lake Inks. Many areas of the lake are totally inaccessable to fishermen’ as a result of this growth. Considerable money is spent, mostly for herbicides, in efforts to clear boat dock approaches and beach areas. The Lower Colorado River Authority, in response to public request, has agreed to lower Lake Inks several feet for a period of approximately two weeks in late February and early March 1962 , in an effort to relieve the vegetation problem. Gizzard shad continued to be the most abundant species in the lake, according to netting samples. Table 1 shows that shad made up 47.88 per cent of number and 10.57 per cent of weight of fish netted during the past segment. This is in line with past years, and indicates some increase over the previous two segments of re-: Survey. Combined with continued poor angling success, the large shad population is responsible for the re-scheduling of a selective rotenone treatment of Lake Inks in early March 1962, while the lake is lowered as described above. Details of this work will be available under Job 16a35, Project F-14-D-6. Rough fish, consisting of gizzard shad, longnose gar, smallmouth buffalo, river carpsucker, gray redhorse sucker, carp, black bullhead and freshwater drum, continue to make up most of the netted fish. Comparisons are given below for years from which data is available. Lake Inks Rough Fish Ratio, 1955-61 1955 Per cent rough fish (number) 63 Per cent rough fish (weight) 74 The increase from 1959 through 1961 is considered real, since netting data is extensive during that period. --- Page 5 --- -3- As indicated earlier, an experimental program (Job E-6) was initiated last year on Lake Inks to test methods of selectively removing rough fish. Lake Buchanan It was felt that netting data for Lake Buchanan suitable for comparison with the basic inventory was lacking. Accordingly, the lake was netted extensively during the past segment. A comparison of per cent of number and per cent of weight of rough fish, comprising gizzard shad, longnose gar, smallmouth buffalo, river carpsucker, gray redhorse sucker, carp, black bullhead and freshwater drum, for years from which data is available, is presented below. Lake Buchanan Rough Fish Ratioy, 1955-61 1955 1958 1959 1960 1961 Per cent rough fish (number) 77 61 73 70 80 Per cent rough fish (weight) 77 66 78 82 86 Only the 1955 and 1961 data is extensive, and it is felt that a comparison between these two years reflects a fairly stable ratio, with the increase indicated probably more real than due to sampling error. A point of interest is that in agreement with the basic inventory of 1955, no blue catfish have shown up in the netting samples from Lake Buchanan. Apparently, this species' range is restricted in the Colorado River system to a point below, Buchanan Dam. It appears likely that Lake Travis is the northernmost boundary and here the species has become greatly reduced in recent years. A few thousand fin- gerlings were stocked in Lake Inks during 1960, but no catches have been reported to date. Lake Buchanan continues to support an enormous sport fisheries. Angling success is reportedly good for flathead (yellow) and channel catfish, largemouth bass, white crappie, and white bass. Good strings of two pound white bass are commonly reported in the upper lake during the late winter and early spring. Trotline fishing, for the catfishes, is quite extensive. Most coves and inlets, as well as much of the open shoreline along large areas of the lake, are laced wth trotlines and their floats. Trotlines are often cut by other fishermen as they find close-in trolling difficult. Despite constant vigilance by State Game Wardens illegal fish traps, largely selective for catfishes, are common on Lake Buchanan. Siltation is heavy in upper Lake Buchanan. In the Falls Creek area, where water once stood over fifteen feet deep at 1010 elevation level following impound- ment in 1939, it is now difficult to maneuver a small boat over much of the area. Submerged aquatic vegetation, a serious pest on most Colorado River lakes, presents no problem on Lake Buchanan. Apparently, this is due to a higher average turbidity because of river silt in the upper lake, a granite and gravel bottom in the lower lake, and considerable water-level fluctuation throughout the year. --- Page 6 --- Recommendations; No further work, except for occasional reconnaissance, is anticipated for Lake Buchanan during the near future. Good fishing and enormous water volume of the lake preclude development work for the present. It is recommended that this job be continued on Lake Inks during the coming segment. The data gathered will be utilized in evaluating the rough fish removal experiment (Job E-6). The resurvey data can also be used to aid in evaluating the selective shad kill mentioned earlier in this report. No other extensive resurveys are planned during the rext segment, since a recent re-alignment of Project F-2-R boundaries introduced considerable waters which need preliminary reconnaissance before problem areas can be determined. { ae tte Prepared by _John G. Wood Approved by wy, By pre A nt Project Leader Coordinator Richard L. White Assistant Project Leader Date_ April 6, 1962 Regional Supervisor --- Page 7 --- -5- Table 1. Lake Inks Netting Results, 1961. Per Cent of Number Per Cent of Weight Species Number Longnose gar Gizzard shad Smallmouth buffalo River carpsucker Gray redhorse sucker Carp Channel catfish Black bullhead Flathead catfish White bass Texas spotted bass Largemouth black bass Warmouth Green sunfish Redear sunfish Bluegill Longear sunfish White crappie Freshwater drum Totals 1,990 100.00 2,311.96 100.00 --- Page 8 --- | | cL T 7] 98° f eL 1 7] CLL eT 98° f 6° T € TL°T 17] €H* T 77° € 8 2° “T €7° T 98°9 OT cL *T a7) Of ET TE 19°07? 87 GL°S? 09 Cl° Tt 9¢ que) Jeg ‘ON TO61 oune 00°90T queg 190g T961 AW que) 19q ‘ON 1961 Ttady quay) 109q ‘ON T96T YoreHW que) 10g T96T 90° 90T *qog 00° OOT LS 9% LI que) Jog ‘ON T96T -uer | sjeq wnip TeyemMysorg etddez> 33 TUM ystjyuns 1ee8u07 T1tsentg ystjuns ivapey ustjyuns use14 yInowzeM sseq YorRTq yqnowes1e7 sseq peqjods sexey sseq 9 TUM peeyuTInNg Aor ystTzieo peoytelTa ystjy}eo Touueyy die9 aeyons eszoyper Aery Leyonsdies ATsATY oTeysng YANowyT T eug peys prezzty iIe8 ssousuoT sUeN UOWWOD “1TQO61 ‘AdAANSoOy ‘ZequNYN Jo JUueD Jeg pue AequnN Aq sq[Nsoey BuTIION SHUT oNeY *Z 9TWGeL --- Page 9 --- hUeD Jeq “ON |JUeD Jeg °o cO6T UPL T961 *20q N ueg 10g T96T 0O0*OOT 8%T “AON OO°OOT 2ST T96L °ON |3U9D Jeg “ON AuSD Jeq *oN|jUeD 10eq ‘oN fUeg 15g ‘oN °300 OO*OOT LST} 00°0OT 98T }O00°00T TET T961 °3deg | T96T *3ny T961 Atne *szequny Aq SuTI2eN syUT eyey STeIO]L unip Jovemysely etddeis 33 TYyM ystyuns 1eeSu07 TI Tsentg ystjuns i1eepey ystjyuns ueei9 YINnNoWwreM sseq Y Nowes1e7 sseq pejjods sexey sseq a2 TYM peeyTing yorrg ystyqeo peoyielg ysTyqeo Touury9 die ayons sszoyper Aeryg Jeyonsdies 19aTy oT ezjnq YyInowyTeug peys prezztyg 1e3 ssous8u07 Suey UOWWOD *penuTqUuos Z eTqey --- Page 10 --- (00'N01 8z° E84 i vit To°9T 99° E17 86°T 12°9%¢ oss 69°T 7 TO"E So" 8t* GL°T 8e° BE °9 8e° €l*or TL*4T €9°ET ser Le 00° TT? 8S°6 69°9CT que) Jeg °IM | T961T unr t i iY { 00°00T LS*LIE | 0N700T LY" 702 ye" 80° oT* 91° GS°8 c6°8 L6°EX yue9 Jeg “IM LOo°T 9° Be° OS* 8L°es YL? 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E1L°S OO°E |Z9°LE CZO°ES |eL*Hy 7O°6S|LS°LE EE°LY IC9°EY 17°16 oTeygng YNowy |] euUs €E°ST 96°S8 |126°6T 80°8Zj0S°ZZ TO'OEJEO°ET S8E°%e IIS°Z 8L°9T peys preZzzto weeee eeene[e---- 0 ---- -|@7° 9° |1TT°S +6°CT EE‘OL B80°Ez 1e3 ssousuoy °2 T961 Atne jueD) 1eq *IMique9g Jeg *IMiqueg Aeg “3Mi/qUeD Jeg °1M USD 30g °1M c96T “UPL TO6T °99d T96T °AON T96T °390 961 °qdeg qusag9 Tog ° IM 1961 Sny aweN uOoWUIoOD *eesqyustoqm Aq SUTIION SHUT oyeY “penutquos € 3, FT --- Page 12 --- =10- Table 4. Buchanan Lake Netting Results, 1961. Per Gent Species Number of Number Longnose gar Gizzard shad Smallmouth buffalo River carpsucker Gray redhorse sucker Carp Channel catfish Flathead catfish Black bullhead White bass Texas spotted bass Largemouth black bass Warmouth Green sunfish Spotted sunfish Redear sunfish Bluegill Longear sunfish White crappie Freshwater drum Totals 5,439 100.00 _wetene 506.14 1,227.09 730.93 2,459.68 14.63 252.00 252.12 141.09 -25 6,033.44 Per Cent of Weight 100.00 --- Page 13 --- = 11s 00° O00T 00° OOT 00°OOT 7 | . | | | ST? i eo” 1 ne” I SL° | Si” [ ce" 1 ne" Z1° | 99°L 1s | sze°s OT Zt'9 8T ely — a oe a cone a ee | of" 4 Ze" T tae ~~ gg" 00°€ of | 1€°T 7 ZO°T € €9°9 06° 9 79°1 c 80°47 ZI CZ°T wee oe ween - So _ Cz: 96 °T EL | 99°02 €9 | 7l°Ov BIT | sere lost ZL | LS" LI Be seas ee 9L°1 let ene yo7 1! 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A Checklist of Species Mentioned in Report. Common Name Longnose gar Gizzard shad Smallmouth buffalo River carpsucker Gray redhorse sucker Carp Channel catfish Black bullhead Flathead catfish White bass Texas spotted bass Largemouth black bass Warmouth Green sunfish Spotted sunfish Redear sunfish Bluegill Longear sunfish White crappie Freshwater drum Scientific Name Lepisosteus osseus Dorosoma cepedianum Ictiobus bubalus Carpiodes carpio Moxostoma congestum Cyprinus carpio Ictalurus punctatus Ictalurus melas Pylodictus olivaris Roccus chrysops Micropterus treculi Micropterus salmoides Chaenobryttus ai leans Lepomis cyanellus Lepomis punctatus Lepomis microlophus Lepomis macrochirus Lepomis megalotis Pomoxis annularis Aplodinotus grunniens