TPWD 1975 F-6-R-22 #1683: Region 2-C Fisheries Studies: Reservoir Categorization, Federal Aid Project F-6-R-22

--- Page 1 --- FINAL REPORT As Required By FEDERAL AID IN FISHERIES RESTORATION ACT TEXAS Federal Aid Project F-6-R-22 Region 2-C Fisheries Studies Objective III: Reservoir Categorization Project Leader: Roger L. McCabe Assistant Project Leader: Kenneth K. Sellers Clayton T. Garrison Executive Director Texas Parks and Wildlife Department Austin, Texas Lonnie J. Peters Robert J. Kemp Chief, Inland Fisheries Director, Fisheries November 18, 1974 --- Page 2 --- Abstract Predictability of large reservoir management practices affecting standing crop has been speculative, due to physical, chemical, and biological variables. Many of these variables are controllable, but cause and effect relationships, involving these variables and standing crop, change in different reservoir types. The purpose of this study is to collect standardized data on major reservoirs in central Texas and to categorize these reservoirs based on the resulting data. Descriptive data were up-dated on 14 major reservoirs, and physical, chemical, and biological sampling was conducted on Lakes Belton and Whitney. Since this study is being terminated prematurely, and data from only two reser- voirs have been acquired, no attempt at categorization was made. Data similar to those collected here will be obtained under a new State-Wide management project, and when sufficient amounts have been accumulated, categorization should be carried out. --- Page 3 --- FINAL REPORT State: Texas Project Number: F-6-R-22 Project Title: Region 2-C Fisheries Studies Study Title: Reservoir Categorization Period Covered: From January 1, 1973 To December 31, 1974 Objective Number: IIt Job Number: 10 Objective: To categorize the major reservoirs of Fisheries Region 2-C. Background: Better predictability in reservoir fisheries management practices is badly needed. Physical, chemical, and biological variables of reservoirs have profound effects on fish populations and in many instances these variables can be manipulated by man. Knowledge of vital cause and effect relationships can provide fishery man- agers with insight for making recommendations based on fact rather than speculation. The relationship of certain enviornmental factors to standing crop has been lemonstrated by Carlander (1955), Hayes and Anthony (1964), Jenkins (1968; 1970) Ryder (1965) and others. Using regression analyses between independent and dependent variables, these investigators have identified significant factors that influence standing crops of fishes in certain reservoir types. Due to the large number of environmental variables and their interactions, data analysis has become very complex. Past survey and inventory records maintained by the Texas Parks and Wildlife Department contain primarily fish population information, but lack much of the additional environmental data needed for categorization. The purpose of this study is to obtain standardized physical, chemical, and biological data from 14 major reservoirs (over 500 acres) and their tailwaters, and to correlate these data by automatic data processing. This report covers two segments of a proposed five year study. Procedures: The first segment of the study was used primarily for familiarizing personnel with reservoirs in the study area, se!ecting sampling techniques and sampling sites, and acquiring descriptive data. Descriptive data forms were compiled on each of the 14 major reservoirs in Region 2-C. Data were recorded for the following par- ameters: age of reservoir, year sampled, drainage area, location, surface elevation, surface area, volume, mean depth, maximum depth, outlet depth, shoreline length, growing season, storage ratio, thermocline depth, mean annual water level fluctation, total alkalinity, total dissolved solids, depth of visibility, shore development, basin geology, riprapping, controlling authority, and reservoir use. Descriptive --- Page 4 --- data were obtained from "Engineering Data on Dams and Reservoirs in Texas" and "Dams and Reservoirs in Texas, Historical and Descriptive Information", publications of the Texas Water Development Board; "Water Resources Data for Texas- Part 2 Water Quality Records", 1969-73, publications of the U.S. Geological Survey; water level reports prepared by the U.S. Army Corps of Engineers; correspondence with controlling agencies; and actual field sampling. Due to the extent of sampling required, only two reservoirs were selected for study during the second segment. Lake Belton, a 12,300 acre lake in Bell County, and Lake Whitney, 23,500 acre lake in Hill and Bosque counties, were chosen so that sampling would coincide with other field activities. Monthly water analyses were run from January through September, 1974, with the exception of the August sample at Lake Whitney. Sampling stations were located at middle and lower lake sites in the lakes proper, and tailwater stations were located 200 meters below the dam and 2 miles downstream (Figs. 1 and 2). Lake parameters tested were: dissolved oxygen, temperature, pH, turbidity, conductivity, total alkalinity, total dissolved solids, sulfates, nitrates, phosphates, settleable solids, and secchi disc transparency. Tailwater parameters were the same, but also included hydrogen sulfide readings. Samples were taken between 10:00 AM and 4:00 PM. Dis- solved oxygen and temperature profiles were read at 1 meter intervals from surface to bottom and the remaining parameters, other than secchi, were read from surface, middle, and bottom samples each month. Sulfates, nitrates, and phosphates were recorded only during April and July. Dissolved oxygen and temperature were determined with a Model 51A YSI oxygen meter and specific conductance was read from a Model 33 YSI conductivity meter. Turbidity, total alkalinity, hydrogen sulfide, and sulfates were determined with a Hach DR-EL portable laboratory. Total dissolved solids, nit- rates, and phosphates were determined by the Regional Parks and Wildlife Department Chemist using standard methods. Settleable solids were measured with 1200 milliliter Imhoff cones after settling approximately 24 hours. Standing crop estimates were made from cove rotenone samples. Three coves totalling 5.0 acres were sampled between September 9th and 25th at Lake Belton (Fig. 1), and three coves totalling 10.7 acres were sampled between August 13th and 28th at Lake Whitney (Fig. 2). Coves were measured using plane table methods and were sounded to determined volume. Block nets made of 3/4 inch bar mesh webbing were used to isolate sampling areas. Nets were dropped at approximately 10:00 PM and treatment began at approximately 8:00 AM the following morning. Approximately 100 fishes of various sizes and species were captured from elsewhere in the lake, measured, tagged with Floy anchor tags, and released into the cove. The mean recovery rates from tagged fishes were used to project recovery rates for all fishes recovered from each cove. Liquid rotenone (5%) was applied at a rate sufficient to insure a total kill and was mixed thoroughly. The day of application and the day following were considered as two recovery days. All fishes were separated by species and inch classes, beginning at 1.49 inches and progressing in 1 inch increments (i.e., 0-1.49= inch class 1, 1.50- 2.49= inch class 2, 2.50-3.49= inch class 3, etc). Total numbers of each inch class were counted both days, but total weights of each species inch class were measured from only the first day's recovery. Average weights for both recovery days were calculated from the first day's recovery. The average number and total pounds of each species inch class for each cove were estimated by dividing the number and weight recovered --- Page 5 --- y the area of the cove. The observed standing crop of each species inch class was determined by weighting the area of each cove and calculating the simple averages of the individual cove results. The total observed standing crop for each species was obtained by adding the simple averages of the individual inch classes. The adjusted standing crop estimate in numbers and weight was obtained by projecting the mean recovery percentage from all tagged specimens to the total observed standing crop. Structures for determining age and growth were obtained from select species in both lakes during 1974. Scales, otoliths, and pectoral spines were removed for use in back calculating growth. This procedure was intended for acquiring comparative growth data from representative sport fishes and was not intended for detailed population dynamics work. Samples of channel catfish, white bass, striped bass (from Lake Whitney), largemouth bass, white crappie, and walleye (from Lake Belton) were collected during April and May. Fishes were collected by experimental gill nets (8 ft. deep and 150 ft. long, having graduated bar mesh ranging from 1-3% inches), frame nets (4 ft. deep and 6 ft. wide, having 1 inch bar mesh) and electro shocking (220 volt D.C. current, max. 3,000 watts). Scales were removed from the left side, below the lateral line, at the tip of the pectoral fin.- The two saggittal otoliths were removed from scaled fishes and the left pectoral spine was removed from channel catfish. Specimens were air dried and stored in envelopes. Reading and measurement of annual marks was not accomplished, due to the shortened work schedule. Vegetative surveys scheduled for August or September were deleted due to extreme drops in water elevation at both lakes. The percent of each lake covered by vege- tation was to have been visually estimated, but virtually all marginal vegetation was Lliminated due to drought conditions. Findings: Reservoir descriptive data from major reservoirs in Region 2-C were combined with like data from other regions by the Austin office in unpublished form. Des- criptive data on Lakes Belton and Whitney were updated to include 1974 information (Tables 1 and 2). Middle and lower lake profiles at Lake Belton revealed an August thermocline depth of approximately 9 to 12 meters with a drop in September to about 18 meters (Tables 3 and 4). Although no August readings were taken at Lake Whitney, the July mid lake profiles showed the thermocline depth to be about 7 meters (Table 5), while the lower lake profile indicated a weak thermocline at approximately 12 to 16 meters (Table 6). September profiles at Lake Whitney showed gradual oxygen and temperature gradients. Lake Whitney (Table 9 and 10) exhibited higher conductivity, total dis- solved solids, and sulfate values than Lake Belton (Tables 7 and 8), but other phy- sicochemical parameters were comparable. These similarities were also shown in the lakes' tailwaters (Tables 11 and 12). The observed standing crop estimate (both number and weight per acre) was higher for Lake Whitney than for Lake Belton, although the species of fish present were nearly identical (Tables 13 and 14). Broad size ranges were shown for most species (Tables 15 and 16), although some species and inch classes known to occur, were totally lacking. Tagged fish recoveries of 62 percent for Lake Belton and 59 ercent for Lake Whitney were recorded. When these percentages were projected to the observed standing crop data the adjusted standing crop figures became substant- ially higher (Tables 13 and 14). --- Page 6 --- Structures for age and growth determination were taken from 228 fishes, 119 from Lake Belton and 109 from Lake Whitney. Walleye (4), striped bass (10), and white crappie were not captured in adequate numbers for back calculation. Approximately 30 specimens of various age classes are needed for this work. A checklist of fish species encountered during all sampling efforts is provided in Table 17. Analysis: No attempt was made to analyze these data for the purpose of categorization. This procedure was scheduled for the fifth year of the study, when comparative data from all 14 reservoirs were to. have been acquired. Analysis of the accumulated data would require complex computer programming, which would necessitate making provisions for computer time. Recommendations: This study is being terminated prematurely, due to overlap with procedures to be carried out under a State-Wide management project effective January 1, 1974. Data to be acquired under this new project will parallel those gathered for categorization. When sufficient data have been acquired state-wide, models should be developed by Parks and Wildlife Department data processing personnel that will group similar reservoirs and identify environmental parameters that significantly affect standing crops in those particular types of reservoirs. Prepared by: (a Roger L. McCabe Project Leader Date: November 18, 1974 Robert Bounds Regional Director Inland Fisheries, Region II Approved by: ingell-Johnson Coordonator --- Page 7 --- Literature Cited Carlander, Kenneth D. 1955. The standing crop of fish in lakes. J. Fish. Res. Bd. Canada 12(4): 543-570. Hayes, F.R., and E.H. Anthony. 1964. Productive capacity of North American lakes as related to the quantity and trophic level of fish, the lake dimen- sions, and the water chemistry. Trans. Amer. Fish Soc. 93(1): 53-57. Jenkins, Robert M. 1968. The influence of some environmental factors on standing crop and harvest of fishes in U.S. reservoirs. Reservoir Fishery Resources Symposium, Athens, Ga., April 1967. Publ. by So. Div., Amer. Fish. Soc., pp. 298-321. 1970 The influence of engineering design and operation and other environmental factors on reservoir fishery resources. Water Res. Bul. 6(1): 110-119. Ryder, R. A. 1965. A method for estimating the potential fish production of north temperate lakes. Trans. Amer. Fish. Soc. 94(3): 214-218. --- Page 8 --- =G= LAICE BELTON McGregor Park Mid lake a Morgan's Point — Live Oak Ridge Lower lake eo 4 = m- Water sample stations \ Tailwater stations &~ Cove rotenone locations \ 4 s my Fig. 1. Map of Lake Belton showing water sample stations and cove rotenone locations. --- Page 9 --- -7- LAKE WHITNEY Mid lake Zz Cedar Creek Cedron Creek Park —Lofers Bend Park Lower lake = wy, Tailwater stations Fig. 2. Map of Lake Whitney showing water sample stations and cove rotenone locations. @- Water sample stations &- Cove rotenone locations --- Page 10 --- =Q= \ Table 1. Lake Belton descriptive data. Reporting biologist Roger L, McCabe _ Reservoir name __ Belton _ _ _ Year impounded 1954 Year sampled 1974 _ _ Drainage area (mi 7) - 3,560 _ Location _ Bell County; Approx. lat 31°06', long 97°28' a Mean annual values 594.0 Surface elevation (ft. msl) Surface area (acres) 12,300 Volume (acre-ft.) ; 457,600 Mean depth (ft, ) Maximum depth (ft, ) _ Outlet depth (ft.) _ Shoreline length (mi. ) | _ Growing season (frost-free days) _ Storage ratio ae Thermocline depth (£t.) | 35-40 coc, Mean annual water level fluctuation (ft.) 10.33 over S yrs. ‘Total alkalinity (mg/)) | 150 a Total dissolved solids (mg/l) i oe Depth of visibility (£t.) | 6 Shore development _ J Basin geology Rock riprap present (yes or no) _ Controlling authority U.S. Army Corps of Engineers _ Reservoir use Flood control, conservation, recreation ee Ee | Cl Limestone Yes --- Page 11 --- -9- T e 2. Lake Whitney descriptive data. Reporting biologist __ Roger L. McCabe Reservoir name Whitney Year impounded 1951 Year sampled 1974 _ Drainage area (mi 7) - 17,656 contributing 8,950 noncontributing _ Location Hill and Bosque Counties; Approx, Lat 31951; long 97°22' Mean annual values Surface elevation (ft. msl) 533.0 Power Surface area (acres) 23,560 __ __ Volume (acre-ft.) 627, 100 __ Mean depth (ft.) | 26.62 | _ M imum _depth (ft.) 108 Outlet depth (ft,) 84,2 Shoreline length (mi.) Growing season (frost-free days) Storage ratio Thermocline depth (ft.) Mean annual water level fluctuation (ft.) Total alkalinity (mg/)) Total dissolved solids (mg/1) 777 Depth of visibility (ft.) | 4- _ Shore development Basin geology Limestone and some shale Rock riprap present (yes or no) Yes Cu..trolling authority. 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O°24@ O°9 8°9 0°8 8° TT 6°TT 8° TT 8° TT S°¢l O°OT 0°OT S°?T S°CT 0°9T 0°9T G°9T S°6 0°72 O°OT O'8T O°St Z°8 0°72 8°6 O°4e €°9 T°L c*L G° 4% G°4~ G° 42 c° 472 6°9 O'L 0°8 0°8 0°8 c°6 c*8T ¢°8T ¢°8T O°SZ 2°8 O°le 8°9 S°?@T O°OT c°?r L°6 8°6 S°S@ 2°8 O°”% O'OT O°f¢e eB°F “£’l 9°L 9°L 0°OT O°Sc €°8 0°42 O'OT G°le@ 0°83 T°8 0°8 0°8 0°8 8° TT 8° TT 8° TT L°TT 0°OT 0°OT 0°OT 0°OT S°9T G°?T 8°6 8°6 S°8T c"8T ¢°8T ¢°8T 0°72 O°OT O°St 4°8 0°92 0°82 O°8 7°8 G° 77 0°SZ 0°SZ G°GSé Lel 0°8 0°8 S°9T O°ET O° LT 0°9T S°72 O°OI £°8 0°82 0O°8 7°83 O° ET O°€T 8°6 0°9 €°8 GHZ O'OT 0°62 6°L 7°8 €°OT O°St %7°8 O°%% O'OT 0°62 O°8 9°83 0°8 VL61 ‘SsatTtjzoad ua8hxo PeATOSSTp pue oinjzersdus3 AauyTyM aye7q JeMOT “9 OTQR] --- Page 16 --- -14- Table 7. Middle Lake Belton physicochemical results, 1974. Total Settle- Specific Total dissolved Sul- Nit- Phos- able Turbidity conductivity alkalinity solids fates rates phates solids Secchi jtu {micromhos 25° s* 20 285 160 258 ¢ 0.1 JAN M 10 280 140 245 <0.1 3 ad 22 iB 10 225 140 239 {0.1 S < 10 320 165 238 ~0.1 FEB M ~10 325 165 246 <€0.1 201 19 B 210 340 165 272 ¢0.1 ) ¢<10 280 140 180 ~0.1 MAR M <10 280 160 193 <0.1 348 2. B 20 285 145 207 <0.1 S ¢10 385 140 277 18 0.6210 0.00978<¢ 0.1 APR M <10 340 150 272 18 0.6650 0.00326 ¢0.1 3.5 23 B ¢<10 330 150 315 18 1.1100 0.00228 0.1 s <10 392 - 130 268 <0.1 MAY M ¢<10 400 155 251 €0.1 2.2 28 B ¢<10 456 165 292 <0.1 S <10 374 130 229 ¢ 0.1 JUN M Z10 , 397 140 219 ~0.1 2.6 19 B <10 390 150 262 <0.1 S ¢10 370 130 353 15 0.0443 0.013004 0.1 JUL M 10 416 140 347 15 0.2220 0.01960<¢0.1 3.0 23 B €10 422 150 449 13 0.2660 0.01300< 0.1 S 210 360 125 218 {0.1 AUG M <10 398 180 252 0.1 1.8 22 B 10 418 160 263 €0.1 Ss <10 341 140 194 13 £0.1 SEP M 410 333 140 172 12 Z0.1 Lal 29 B <10 398 170 216 11 0.1 ‘ Symbols: S= Surface of profile M= Middle of profile B= Bottom of profile --- Page 17 --- -15- JAN 22 FEB 19 APR 23 MAY 28 JUN 19 JUL 23 AUG 22 SEP 2g Table 8. S* DEn BEN wen PEN wen wen ww Zn we + Wen Turb it 10 10 < 10 Z 10 Z 10 210 < 10 ¢ 10 15 <10 £10 10 {10 210 10 <10 £10 25 £10 210 10 < 10 210 Z10 <10 £10 £10 Symbols: Specific idity conductivity u 2 335 320 340 275 275 265 345 340 340 392 432 456 392 404 403 370 402 402 373 403 402 352 354 399 S= Surface of profile M= Middle of profile B= Bottom of profile Total alkalinity 165 165 155 150 150 145 155 150 140 150 155 135 135 140 150 130 140 145 120 145 145 130 130 160 Lower Lake Belton physicochemical results, 1974 Total dissolved Sul- solids 216 251 274 290 252 209 217 225 274 278 342 191 266 252 212 246 232 381 396 398 225 229 217 170 185 224 fates 17 17 19 15 14 15 12 12 13 Nit- Phos- rates phates 0.6650 0.00654 0.8650 0.01630 1.6000 0.02280 0.0890 0.00650 0.2220 0.00650 0.4000 0.00650 Settle- able solids Secchi m /1)_ _(m, zO0.1 <0.1 2.9 <0.1 < 0.1 <0.1 aul g0.1 < 0.1 £0.1 387 ZOal ~0.1 g0.1 3.9 <0.1 20.1 < 0.1 233 g 0.1 <€ 0.1 <0.1 3a1 0.6 Z~0.1 20.1 2.6 0.1 Z 0.1 < 0:1 1.9 C€0.1 40.41 <0.1 2.1 g0.1 --- Page 18 --- «16= Table 9. JAN 23 FEB 26 18 APR 16 2d. JUN 18 JUL 16 AUG %* WIZ | wen wzewm wen Wen wDWEwNM WEN wen Middle Lake Whitney physicochemical results, 1974. Specific pH Turbidity conductivity 7.8 ¢<10 7.7 <10 7.4 <10 7.5 410 7.5 10 7.3 <10 7.9 10 6.8 10 6.6 10 8.0 ~10 8.0 <10 6.3 <10 6.8 0 6.2 0 6.2 0 0 0 0 Symbols: S§S M tu micromhos 25Cc° 1750 1775 1800 1000 1000 1050 1824 1862 1700 1900 1900 1650 1845 1947 1978 1593 1600 1850 Surface of profile Middle of profile B= Bottom of profile Total alkalinity 130 135 130 135 140 120 140 140 160 130 130 140 120 130 130 105 110 115 Total dissolved Sul- solids 0977 1953 1004 fates 190 170 180 125 125 125 125 125 125 Settle- Nit- Phos- able rates phates. solids Z 0.1 ~ 0.1 0.1 0.5320 0.026102 0.1 0.4430 0.03920¢0.1 0.6650 0.09130¢0.1 ooo Pre ooo en eo 0.0890 0.1330 0.3560 ANKR ARR RAK ooo eee oe ooo ee Nh Secchi 1.3 1.6 LD 1.7 ee 0.9 --- Page 19 --- ~[ 7s tavie 1U. Lower Lake Whitney physicochemical results, 1974. Total Settle- Specific Total dissolved Sul- Nit- Phos- able pH Turbidity conductivity alkalinity solids fates rates phates solids Secchi tu micronmhos 25c° s* 18.3 <10 1000 130 1298 < 0.1 JAN M 18.4 10 1000 130 . 1249 20.1 2.3 23 —i«BeS«SCSPS «wv 15 950 130 1201 0.4 s |8.2 10 1500 130 1150 , £0.1 FEB M |8.1 10 1500 140 1187 £0.1 2.3 26 = «BS«d: 85 10 1450 135 1380 : 0.3 S 18.0 0 1550 135 1101 ¢0.1 MAR M 1|7.8 0 1600 120 1128 20.1 2.7 18 B 17.4 10 1650 130 1118 20.1 S 18.3 0 1000 125 1397° 175 0.0889 0.04560 ¢0.1 . APR M 17.9 0 1000 130 1322 175 0.2220 0.02610 ¢0.1 2.5 16 B 17.5 10 1000 120 1146 200 0.4430 0.07840 0.1 Ss |7.1 10 1818 130 1190 £0.1 MAY M |7.0 £10 1820 130 1173 Z0.1 2.7 21 BB O«ds;C 3 210 1192 150 1227 20.1 ; S [7.2 0 1850 130 1321 20.1 JUN mM |6.7 0 1850 130 1269 £0.1 2.3 18 B /6.0 <10 1700 135 1207 , 0.1 S 16.5 0 1852 130 1158 125 0.1330 £0.1 . JUL M |6.4 0 1758 130 1241 125 0.1330 20.1 1.8 16 B |6.2 0 1605 140 1038 126 0.1330 {0.1 S AUG M B s |6.6 0 1850 110 1171 0.1 SEP M |6.4 Os 1782 160 1215 0.1 2:1 20 «4B | 6.6 0 900 110 1132 20,1 * Symbols: S= Surface of profile M= Middle of profile B= Bottom of profile --- Page 20 --- -18- Total Settle- Specific Total\ - solved Hydrogen Sul- Nit- Phos- able Turbidity conductivity alkalinity solids sulfides fates rates phates solids Secchi jtu micromhos 25C° u* | 8.0 15 503.2 160 210 0.1 < 0.1 1.6 JAN a2 L | 7.8 15 496.0 180 289 0.1 0.1 1.1 u | 8.1 0 399.0 165 281 @ Ged, < 0.1 1.8 FEB 19 L | 8.2 0 390.4 170 236 0.1 < 0.1 1:2 u | 8.1 ¢ 10 — 396.8 150 246 <0.1 < 0.1 2.0 MAR a L | 7.8 20 414.8 160 230 <0.1 ¢ 0.1 6.0 u | 7.0 <10 480.3 150 315 < 0.1 0.9780 0.0310¢ 0.1 1.6 APR 23 L | 7.0 <10 446.3 145 327 Z O41 0.7550 0.0620¢0.1 A 2 U | 6.9 10 437.0 155 270 < 0.1 ¢ 0.1 1.5 MAY 28 L | 7.1 10 450.0 160 277 <0.1 € 0.1 21 u | 6.1 0 392.0 150 225 <0.1 < 0.1 2.2 JUN . 19 L | 6.5 0 404.0 150 238 0.1 0.1 1.5 U | 6.8 0 396.0 145 321 ¢ 0.1 15 0.4000 0.0130¢ 0.1 1.4 JUL 23 L | 6.3 0 385.4 145 371 Z0.1 15 0.1070 0.0065<0.1 1.4 U | 6.8 0 140 255 <0.1 0.8 AUG 92 %-L | 6.3 0 145 259 £0.1 0.8 U 0 401.2 160 215 10 2.3 SEP 29 OL 0 397.8 160 209 12 1.4 *Symbols: U= Upper station, 200 yards below the dam. L= Lower station, 2 miles below the dam. --- Page 21 --- -19- Table 12. Lake Whitney tailwater physicochemical results, 1974. Total Settle- Specific Total dissolved Hydrogen Sul- Nit- Phos- able Turbidity conductivity alkalinity solids sulfides fates rates phates solids Secchi tu micromhos 25C° U* JAN 23 L U FEB 23 L | 8.1 <10 1781 135 1226 < 0.1 0.05 1.5 u | 8.0 10 2032 130 1056 <0.1 € 0.1 1.0 MAR 18 L | 7.7 <10 2013 130 1194 <0.1 <0.1 1.9 u | 7.9 <10 1734 140 1112 ¢0.1 175.1775 .01960 <0.1 1.6 APR 16 L |7.4 <10 1749 135 1257 ¢ 0.1 175.1775. «01305 0.1 1.6 U 17.3 <10 1782 130 1036 <0.1 ¢0.1 1.5 MAY 21 L | 6.7 <10 1800 140 1123 £0.1 0.1 >1.5 u | 6.7 0 1764 135 1140 ¢0.1 {0.1 >1.4 JUN 18 L | 7.0 0 ~ 1700 135 1188 £0.1 0.1 1.4 u | 7.0 0 1880 140 1214 125 0.1330 <0.1 1.3 JUL 16 L | 7.0 0 1848 120 1101 125 0.0890 €0.1 1.6 U AUG L U 0 940 110 1152 0.1 0.8 SEP ; 20 L 0) 810 180 436 0.1 1.0 *Symbols: U=Upper station, 200 yards below the dam. L=Lower station, 2 miles below the dam. --- Page 22 --- «20+ Table 13. Total standing crop estimates from Lake Belton, 1974, Observed standing crop Adjusted standing crop No./acre Lbs ./acre No./acre Lbs./acre Spotted gar 2.95 3.37 4,76 5.44 Longnose gar 0.34 2.38 0.55 3.84 Threadfin shad 76.25 0.35 122.99 0.56 Gizzard shad 59.29 16.52 95.63 26.64 Smallmouth buffalo 14.05 62.91 22.66 101.47 River carpsucker 3.23 6.74 5.21 10.87 Gray redhorse 3.14 5.10 5.07 8.23 Carp 2.00 16.43 3.23 26.50 Bullhead minnow 44.09 0.17 71,11 0.27 Channel catfish 40.79 10.79 65.79 17.40 Black bullhead 4,28 0,10 6.90 0,16 Yellow bullhead 2.24 0.24 3.61 0.39 Flathead catfish 1,26 0.08 2,03 0.13 Tadpole madtom 31.83 0.12 51.34 0.19 Blackstripe topminnow - 0,67 0.01 . 1,08 0.02 White bass Le2] 0.51 2.05 0.82 Spotted bass 26.66 0.94 43.00 1 a2 Largemouth bass 76.41 37.49 123.24 60.47 Warmouth 125.16 1.35 201.87 2.18 Green sunfish 594.55 5.13 958.95 8.27 Redear sunfish 177.34 3.58 286.03 5.77 Bluegill 1,185.67 64.77 1,912.37 104.47 Longear sunfish 289.70 4,26 467.26 6.87 White crappie 36.96 4,34 59.61 7.00 Black crappie 0.19 0.09 0.31 0.15 Logperch 36.88 0.38 59.48 0.61 Freshwater drum 3.30 2.54 5.32 4.10 Totals 2,840.50 250.69 4,581.45 404.34 --- Page 23 --- -21- Table 14. Total standing crop estimates from Lake Whitney, 1974, Observed standing crop Adjusted standing crop No./acre Lbs./acre No./acre Lbs./acre Spotted gar 3:04 3.59 515 6.08 Longnose gar 0.29 0.90 0.49 1,53 Threadfin shad 322.37 5,05 546.39 8.56 Gizzard shad 776.60 146.49 1,316.27 248 .29 Smallmouth buffalo 4.07 37.16 6.90 62,98 River carpsucker 2.53 2,34 4,29 3.97 Gray redhorse 3.17 3.21 5.37 5.44 Carp 10,45 33.27 17.71 56.39 Channel catfish 39.74 11.47 67.36 19.44 Yellow bullhead 0.07 0.01 0.12 0.02 Flathead catfish 5.15 6.00 8.73 10.17 Blackstripe topminnow 0.44 0.01 0.75 0.02 White bass 3.18 1.41 5.39 2.39 Spotted bass 29,09 2,83 49.31 4,80 Largemouth bass 43.69 13.20 74.05 22.37 Warmouth 75.62 14,80 128.17 25.09 Green sunfish 125.17 2.64 212,15 4.47 Redear sunfish 69.14 4,32 117.19 7132 Bluegill 468 .33 17.24 793.78 29 «22 Redbreast sunfish 254.55 14.43 431.44 24.46 .ongear sunfish 92.75 1.82 157.20 3.09 White crappie 30.58 16,28 51.83 27.59 Black crappie ~ 9,01 1.46 15.27 2.47 Logperch 0.28 0.28 0.47 0.47 Freshwater drum 112,68 46.68 190.98 79.12 Totals 2,481.99 386.89 4,206.76 655.75 --- Page 24 --- -22- Table 15. Standing crop estimates for species inch classes from Lake Belton, 1974. inch- No. of Pounds inch- No. of Pounds Species class fish per Species class fish per TL er_acre acre TL er_acre acre Spotted gar 23 0.67 1.17 River carpsucker 20 0.15 0.53 21 0.67 0.87 19 0.30 0.97 19 0.56 0.64 18 0.30 0.89 18 0.19 0.20 17 1.12 1.68 17 0.67 0.40 16 1.21 2.42 14 0.19 0.09 15 0.15 0.25 Longnose gar 43 0.19 1.44 Gray redhorse 18 0.19 0.46 37 0.15 0.59 17 0.86 1.77 16 0.34 0.61 Threadfin shad 6 1.30 0.08 15 1.22 1.78 5 0.93 0.04 14 0.34 0.47 4 1.85 0.02 6 0.19 0.01 3 9.72 0.07 2 60.13 0.13 Carp 29 0.19 2.33 1 2wd2 <0.01 27 0.15 1.91 25 0.15 1.42 Gizzard shad 13 0.37 0.11 24 0.76 5.44 12 2.60 1.50 23 0.45 3.41 11 8.15 4,24 22 0.30 1.92 10 18.35 5.68 9 14.98 3.64 Bullhead minnow 3 9.24 0.07 8 DaI2 0.86 2 31.52 0.09 7 2.00 0.18 1 3.33 g0.01 6 2.88 0.20 5 0.15 0.01 Channel catfish 24 0.15 0.67 4 2.88 0.09 23 0.15 0.57 3 1.21 <0.01 22 0.15 0.48 21 0.33 0.85 Smallmouth buffalo 28 0.15 2.47 20 1.04 2.49 27 0.15 1.91 19 0.30 0.71 26 0.64 7395 18 0.34 0.66 25 0.30 3.11 17 0.19 0.31 24 0.94 9.28 16 0.82 1.32 23 1.19 8.53 15 0.64 0.76 22 1.45 10.72 14 0.30 0.24 20 0.45 1.79 13 0.37 0.26 19 0.76 2.69 12 0.56 0.33 18 1.67 4.65 11 0.19 0.09 17 2.12 4.50 10 0.97 0.25 16 0.45 0.66 9 0.79 0.15 15 0.45 0.50 8 1.21 0.18 14 0.91 1.40 7 1.43 0.17 13 2.12 2.42 6 0.52 0.05 12 0.30 0.33 (continued) 5 1.16 0.03 --- Page 25 --- «33- ible 15. (Continued) inch- No. of Pounds inch- No. of Pounds Species class fish per Species class fish per (TL) per acre acre (TL) per acre acre Channel catfish 4 5.38 0.11 Largemouth bass 16 0.15 0.38 3 5.52 0.05 15 1.80 3.54 2 10.15 0.04 14 1.19 1.28 1 8.13 0.02 13 3.17 3.42 12 7.90 5.69 Black bullhead 6 0.19 0.02 11 17.42 10.38 5 0.93 0.05 10 12.01 5.42 4 0.56 0.01 9 4.32 1.42 3 2.04 <0.01 8 1.76 0.46 2 0.56 €0.01 7 1.25 0.15 6 2.97 0.50 Yellow bullhead 10 0.15 0.04 5) 9.72 0.49 9 0.30 0.12 4 9.26 0.23 8 0.15 0.03 3 2522 0.04 7 0.15 0.02 1 0.33 <0.01 5 0.15 <0.01 4 0.67 0.01 Warmouth 6 0.49 0.08 2 0.67 €0.01 5 L.f2 0.11 4 14.10 0.45 athead catfish 9 0.33 0.06 3 29.61 0.45 3 0.56 £0.01 2 76.24 0.24 2 0.437 £0.01 1 3.00 0.02 Tadpole madtom 4 0.67 0.01 Green sunfish 8 0.33 0.08 3 2.58 0.02 7 1.13 0.23 2 25.65 0.08 6 3,13 0.42 1 2.93 0.01 5 9.00 0.38 4 33.51 1.01 Blackstripe topminnow 2 0.67 £9.01 ) 174.26 1.78 2 227.63 1.03 White bass 12 0.15 0.10 1 145.56 0.20 11 0.45 0.28 8 0.67 0.13 Redear sunfish 8 1.19 0.29 7 2.16 0.42 Spotted bass 10 0.15 0.08 6 8.27 0.94 9 0.70 0.24 5 9.22 0.79 8 0.33 0.05 4 8.64 0.29 7 0.52 0.07 3 12.93 0.18 6 0.37 0.03 2 131.45 0.66 5 1.41 0.07 1 3.48 < 0.01 4 12.81 0.28 3 10.37 0.12 Bluegill 7 41.77 9.12 6 187.04 28.06 Largemouth bass 23 0.15 1.05 5 180.62 15.72 20 0.34 1.44 4 151.95 707 19 0.15 0.62 3 239.98 3.16 17 0.30 0.97 (continued) 2 333.16 1.59 --- Page 26 --- -24- Table 15. (Continued) inch- No. of Pounds inch- No. of Pounds Species class fish per Species class fish per (TL) per acre acre (TL) per acre acre Bluegill 1 51.15 0.05 Longear sunfish 6 1.61 0.18 5 16.60 1.35 4 25.65 0.97 3 68.87 0.91 2 135.41 0.77 1 41.56 0.08 White crappie 12 0.15 0.12 11 0.15 0.11 10 1.65 0.82 9 3,15 1.17 8 2.58 0.59 7 5.34 0.85 6 3.48 0.45 5 0.61 0.07 4 2.58 0.03 3 14.09 0.11 2 3418 0.02 Black crappie 8 0.19 0.09 Log perch 6 0.19 €0.01 5 0.45 ¢0.01 4 21.14 0.21 3 14.17 0.14 2 0.93 ¢€0.01 Freshwater drum 17 0.15 0.15 16 0.33 0.47 15 0.34 0.47 13 0.70 0.49 12 1.26 0.77 11 0.37 0.16 8 0.15 0.03 --- Page 27 --- -25- Table 16. Standing crop estimates for species inch classes from Lake Whitney, 1974. inch- No. of Pounds inch- No. of Pounds Species class fish per Species class fish per TL er_acre acre TL er acre acre Spotted gar 29 0.11 0.26 Smallmouth buffalo 27 0.22 3.28 27 0.19 0.21 26 0.07 0.85 26 0.07 0.15 25 0.22 2421 25 0.17 0.34 24 0.30 2.82 24 0.22 0.40 23 0.63 4,49 22 0.07 0.33 22 0.73 5 «34 21 0.18 0.24 21 0.44 2.53 20 0.50 0.60 20 0.24 1.27 19 0.81 0.65 19 0.09 0.45 18 0.09 0.10 15 0.15 0.26 17 0.09 0.05 14 0.22 0.40 16 0.17 0.12 L3 0.07 0.08 15 0.26 0.12 14 0.11 0.02 River Carpsucker 19 0.18 0.19 18 1.66 1.20 Longnose gar 37 0.15 0.46 17 0.24 0.57 33 0.07 0.22 16 0.09 0.14 31 0.07 0.21 14 0.07 0.09 8 0.07 0.01 13 0.15 0.10 12 0.07 0.03 Threadfin shad 6 10.63 0.51 10 0.07 0.02 5 41.70 1.69 4 64.99 1.50 Gray Redhorse 19 0.07 0.22 3 88.02 1.04 18 0.22 0.53 2 54.82 0.32 17 0.33 0.41 1 62.18 0.09 16 0.11 0.22 15 0.31 0.38 Gizzard shad 15 0.18 0.21 14 0.11 0.15 14 4.26 3.85 13 0.07 0.08 13 25.31 17.17 12 0.30 0.24 12 54.01 32.59 11 0.58 0.31 11 72.09 28.79 10 1.50 0.60 10 23 «33 7.49 9 0.09 0.01 9 43.04 8.60 8 160.10 24.46 Carp 27 0.07 0.66 7 116.78 11.59 26 0.09 0.72 6 134.98 8.11 25 0.15 0.90 2 19.92 0.81 24 0.15 0.70 4 122.60 2.21 23 0.72 221 3 46.55 0.61 22 1.77 7.78 21 2.48 9.12 aallmouth buffalo 30 0.15 4.80 20 1.39 4.96 29 "0.30 4.69 19 1.03 2.94 28 0.24 3.69 (continued) 18 0.37 0.97 --- Page 28 --- Table 16. (Continued) Species Carp Channel catfish Yellow bullhead Flathead catfish inch- class Pee NwWEUNwMROUDRNIBE No. of fish er acre 0.42 0.48 0.11 (=) ~ oooooco°o i) - SCrFNWFEFUUNEBNHFEFODDOOCOOCO”0O (oo) Oo oO Oo ~N ooo0oco°coco a sw ~i6- Pounds per acre 0.92 1.24 1.56 0.49 0.29 0.28 0.27 0.28 0.11 0.02 0.05 Species Flathead catfish Blackstripe minnow White bass Spotted bass Largemouth bass (continued) inch- class TL 7 6 5 4 3 2 rR dh © No. of fish er_ acre 0. 15 0.24 Orro ooo Orroe9cj]e NOWOWRrPERFPRrENFODOO NONONWrFODOOGDCACSO -o7 61 25 69 eid 322 ell Pounds per acre 0.01 0.02 0.01 0.04 0.02 0.01 0.01 0.01 0.01 0.12 0.22 0.17 0.54 0.32 0.04 0.06 0.27 0.31 0.31 0.44 0.66 0.27 0.14 0.15 0.06 0.05 0.09 0.02 0.46 0.61 0.20 0.62 0.93 0.88 0.86 0.90 0.90 1.35 2.12 1.87 0.99 0.11 0.07 --- Page 29 --- Té » 16. (Continued) inch- Species class TL Largemouth bass 4 3 2 Warmouth 8 6 > My 3 2 1 Green sunfish 8 7 6 5 PA 3 2 1 Redear sunfish 8 7 6 5 di 3 2 Bluegill 8 7 6 5 4 3 2 1 Redbreast sunfish 9 8 7 6 5 i 3 No. of fish er acre .69 215 19 .19 79 45 «99 ofl .70 243 98 214 «93 33 94 -98 -83 23 -65 =2/- Pounds per acre 0.24 0.09 0.02 0.01 0.29 0.57 1.34 0.93 0.16 0.32 0.01 0.08 1.49 2.20 5.07 4,36 2.60 0.42 0.02 0.05 1.74 2.78 3.88 5.19 0.42 0.17 Species Redbreast sunfish Longear sunfish White crappie Black crappie Log perch Freshwater drum (continued) inch- No. of class fish TL er acre 2 30.21 1 14.03 6 1.02 5 8.72 4 17.26 3 35.74 2 28.72 1 1.29 13 0.15 12 0.07 11 0.15 10 0.55 9 0.64 8 1.01 7 6.10 6 13.84 5 6.78 4 0.53 3 0.61 2 0.15 12 0.07 10 0.07 an) 0.07 8 1.32 7 3.10 6 3.98 5 0.40 4 10.44 3 10.40 2 0.62 19 0.07 18 0.11 16 0.07 15 0.07 14 0.07 13 0.38 12 3.50 11 12.02 10 25.51 9 10.58 Pounds per acre 0.11 0.09 0.01 0.49 0.83 0.36 0.14 0.01 0.17 0.03 0.60 0.22 0.19 0.22 13..30 1.16 0.34 0.05 0.01. 0.021 0.07 0.06 0.04 0.34 0.51 0.41 0.03 0.18 0.10 0.02". 19.39 0.26 0.10 0.13 0.09 0.27 2.34 5.32 10.52 2a ht --- Page 30 --- ‘Table 16. (Continued) Species Freshwater drum inch- class TL 8 7 6 5 4 3 No. of fish er acre Le 34. 20. l. 0. 1. 92 60 83 06 70 19 -28- Pounds per acre 0.42 3.64 1.28 0.08 0.02 0.05 Species inch- class No. of fish er acre Pounds per acre --- Page 31 --- Table 17. A checklist of fishes Scientific Name Lepisosteus oculatus Le. osseus Dorosoma petenense D. cepedianum Ictiobus bubalus Carpiodes carpio Moxostoma congestum Cyprinus carpio Pimephales vigilax Ictalurus punctatus I. melas T. natalis Pylodictis olivaris Noturus gyrinus Fundulus notatus Morone chrysops M. saxatilis Micropterus punctulatus M. salmoides 2pomis gulosus Le cyanellus L, microlophus L. macrochirus Li. auritus L. megalotis Pomoxis annularis P. nigromaculatus Stizostedion vitreum Percina caprodes Aplodinotus grunniens -29- encountered from Lakes Belton and Whitney, 1974. Common Name Spotted gar Longnose gar Threadfin shad Gizzard shad Smallmouth buffalo River carpsucker Gray redhorse Carp Bullhead minnow Channel catfish Black bullhead Yellow bullhead Flathead catfish Tadpole madtom Blackstripe topminnow White bass Striped bass Spotted bass Largemouth bass Warmouth Green sunfish Redear sunfish Bluegill | Redbreast sunfish Longear sunfish White crappie Black crappie Walleye Logperch Freshwater drum Belton OS OS OS OS OS OOS OS OOS OK Od OO OO OO OS OOS OX so od mt OO OX mS OO OS OM OO Whitney << Pa oO OK OM OM OO OM oS OS OS OO Od Od OK OO OK OOO OO x x