(1956–1957) Experimental Control of Undesirable Fish Species in Lake Diversion: Dingell-Johnson Project F-7-R-4, Job E-2

--- Page 1 --- Report of Fisheries Investigations “(Bx erimental Control of Undesirable Fish Species in Lake Diversion A id by Leo D. Lewis Project Leader Dingell-Johnson Project F-7-R-4, Job E-2 June 1, 1956 - May 31, 1957 H. D. Dodgen - Executive Secretary — Texas Game and Fish Commission Austin, Texas Marion Toole William H. Brown Coordinator Asst. Coordinator --- Page 3 --- SEGMENT REPORT State of TEXAS Project No. F7R4 Name: Fisheries Investigations and Surveys of the Waters of Region 1-B. Job No. E-2 Title: Experimental Control of Undesirable Fish Species in Lake Diversion. Period Covered: June 1, 1956 through May 31, 1957 ABSTRACT 3 An estimated minimum of 185 tons of fish, mostly gizzard shad and drum, were removed from Lake Diversion by an experimental selective-kill treatment in March, 1957. Details of the treatment and a discussion of factors involved are given. Inventory has been taken by gill net and seine collections before and after treat- ments in order to compile comparative data which may indicate possible effects of the treatment. A total of 1,288 fishes was collected by gill nets from which data concern- ing food habits, sexual development, spawning success, coefficient of condition and pathological conditions was recorded, and as far as possible, reduced to tabular form. NBJECTIVES 3 To determine the practical application and effectiveness of methods developed under Job E-1 (Experimental Control of Undesirable Fish Species). TECHNIQUES ¢ Field work on this Job began in July, 1956. An attempt was made to collect suf- ficient data prior to experimental treatments that would be comparable to data that: will be collected following treatments. Collections spaced approximately one month apart were attempted, but crowded work schedules, high winds and other adverse weather condi- tions prevented collections during the months of June, August and October, 1956, and January, 1957. Approximately 1200 feet of gill net, ranging in size from one inch to three inch (square mesh) were set on each visit. Each fish taken in these nets was measured, weighed, and the stage of gonadal development recorded. In addition, filled stomachs of predacious species were saved in formalin, as well as ripe ovaries, patho- logical tissues and parasites. Samples of forage fishes were obtained with the use of small-mesh seines, and the complete collections preserved in formalin. In the labora- tory, formalin-preserved materials were identified, examined and the data recorded. Physical data, including air temperature, water-surface temperature and turbidity were recorded at the lake. Samples of lake water were saved and the pH and dissolved solids present were determined. Ecological data pertaining to the lake were obtained in the usual ways and detailed notes were taken. After ten months of inventory and study, Lake Diversion was treated for a selective- _11 on shad and drum. Immediate effects of the treatment were observed and recorded, and a total-kill estimate was attempted. The next month following treatment, the study that is described above was continued to determine the long range effects and, possibly the need and feasibility of future treatments. --- Page 4 --- FINDINGS : Lake Diversion, located in Archer and Baylor Counties, is 3,420 surface acres in size.and contains 40,000 acre feet of water. Its greatest length is approximately 7 miles; its greatest width about 3 miles, and it has a shoreline of roughly 28 miles. The dam was construced in 1923. The lake is primarily a storage reservoir for water to irrigate the Big Wichita River Valley. The source of Lake Diversion water is principally Lake Kemp, which is a much larger lake and whose dam is located eighteen miles, by river, to the westward of the Lake Diversion Dam. The water level of Lake Diversion is maintained at a desired level by ~ regulated inflow from Lake Kemp. An inventory of fish species present in Lake Diversion was made from Jurg, 1953 to June, 1954. Results of this study are contained in the report, F-7-R-1, Job B-2. Lake Diversion was chosen as an experimental rough fish control lake as a result of this work. FISH COLLECTIONS A total of 1288 fishes was collected by gill nets from Lake Diversion during the segment period from June 1, 1956 to May 31, 1957. Percentage composition, sex ratios and average weights by sex of fishes collected by gill nets are given in Table l. The total weight of all species collected by gill nets is 1,763.2 pounds. Percentage com- position by weight and mean weights of fishes collected by gill nets is given in Table 2. Monthly totals of species collected by gill nets are given in Table 3. A total of 1,395 forage fishes was taken from Lake Diversion during the segment with small mesh minnow seines. This information is given in Table 4. The total number of fishes taken by both gill nets and seines is given in Table 5. WATER QUALITY The water in Lake Diversion contains a very high concentration of salt. It is far too salty for municipal consumption, and the value of this water for irrigation has been questioned. Nevertheless, it is used to irrigate the valley of the Big Wichita River, | and freshwater fishes thrive and reproduce in it. Lake Diversion has but a small watershed of its own. Its water level is main- tained at or slightly below spillway level with water from Lake Kemp, which is also salty. There is relatively little dilution of salts following rains due to the small watershed, and the water of Lake Diversion becomes extremely salty in periods of drought and heavy evaporation. Table 6 gives the chemical nature of the water at Lake Diversion from duly, 1956 to May, 1957. PHYSICAL CHARACTERISTICS The surface of the open water at Lake Diversion reached temperatures as high as 80° F in summer and as low as 41°F in winter. During some cold snaps, a layer of ice formed along the shore of shallow, protected areas thick enough to prevent seining activities. Total salts ranged from 1272 to 2751 ppm during this study, and the flocculating effect of these salts resulted in relatively clear water. Maximum clarity is seldom obtained, however, because the lake is exposed to almost constant roiling action of winds. The lake --- Page 5 --- lies in semi-desert "mesquite country" with few cloudy days. As a result of abundant inlight and water clarity, the plankton fauna is rich in species and individuals and ae lake water is highly productive. Physical conditions of Lake Diversion water, at the time when fish samples were taken, are given in Table 7. VEGETATION, By speciation, multicellular aquatic vegetation is not abundant in Lake Diversion. Pondweeds, mostly Potomogeton, appear in shallower waters of protected bays in the late spring and often form masses that are dense enough to impede boat traffic. Chara, al- though apparently abundant, seldom appears on the surface. Bottom samples obtained with an Eckman Dredge showed Chara to be present at or near all of the collection stations, and it is often snagged by deep-running trolling lures in the open waters. Emergent littoral vegetation is scarce and includes only a few small stands of cattail (Typha) and bullrush near the mouths of tributary creeks and along the river at the head of the lake. FOOD HABITS Food remains were found in stomachs of 37 specimens, 19 of which were white bass and 10 were channel catfish. Table 8 presents results of analysis made on food remains found in stomachs of all specimens that contained food. The bulk of the food items identified were insects and fish, mostly insects. Individual fish showed great select- ivity in their feeding habits. Stomachs of those that were feeding on insects at the time of capture usually contained only insects and nothing else. The same was true of those feeding on fish at the time of capture. Mayflys were found in stomachs more fre- quently and in greater quantities than any other food item. SEXUAL DEVELOPMENT AND SPAWNING SUCCESS All fishes captured in gill nets were opened in the field and their gonads examined and the stage of development recorded. If the gonads were of medium-size or smaller, and were poorly developed, they were recorded as "immature". If they were large and well-developed, obviously approaching spawning condition, they were termed "ripe". In those instances where a fish was captured shortly after spawning, it was called "spent". The latter condition is difficult to determine in males, but easier in females. Immature individuals of the larger fishes were taken in seine drags and measured and counted. In addition, notes were made of schools of fry seen, young fishes found in the stomachs of predacious fishes, ete. When ovaries contained large eggs, nearly ready to be spawned, the two ovaries of such a fish were carefully removed, labeled and preserved in formalin. In the laboratory, the ovaries were carefully cleaned of excess tissues and weighed to the nearest one-tenth of a gram. Then a small quantity, roughly a gram, was snipped from one ovary and weighed on a chemical balance to the nearest one-one hundredth of a gram. The eggs in the small portion were then counted. An average of three counts was determined and the total number of eggs present in the two ovaries estimated (number of eggs counted times weight of both ovaries divided by the weight of the small section). Table 9 gives the total number of eggs found in ovaries of thirteen ripe females. --- Page 6 --- Lepisosteus osseus ticnenose gar) Apparently, the major spawning period for this species is June. All specimens of both sexes captured in April and May were ripe, and one female was found to be spent on May 28, 1957. All specimens of both sexes were recorded as either spent or immature in July. No young gar were taken in seine hauls for forage fish at any time during the segment. Lepisosteus platostomus (shortnose gar) Only three females were caught this segment. They were taken April 30, 1957, and were all ripe. Apparently, the spawning season of this species coincides with that of the longnose gar. Dorosoma cepedianum (gizzard shad All of the females taken in April and May were ripe, but the major spawn did not oceur until June. Young of the year were common in seine hauls in July. Ictiobus cyprinellus (bigmouth buffalo) Although known to be present in Lake Diversion, not a single specimen of this species was captured during this segment. Commercial fishermen have reported taking a few big- mouth buffalo along with several thousands of smallmouth buffalo. The reason for the apparent decrease and present rarity of this species is unknown at this time. Perhaps it is unable to compete with the large populations of smallmouth buffalo and carpsucker. A life history study of this most desirable of the rough fish species is greatly needed. Ictiobus bubalus (smallmouth buffalo) This species is an early spawner, mostly in late March and early April. All of the seven females taken April 30, 1957, and all of the sixteen females taken May 28, 1957, were spent. Ripe males were taken throughout the year, especially following periods of rainfall. Carpiodes carpio (river carpsucker) Spawning of this species is very successful in Lake Diversion. All of the larger females were ripe in March. Spawning began in April and continued through May and June, and was completed, for the most part, by July. A few ripe males were found throughout the year. No young of the year were taken in any of the seine drags nor in stomachs of any predacious fishes. A life history study of this species is also greatly needed. Cyprinus carpio (carp Carp are not numerous and do not constitute a problem in Lake Diversion. No --- Page 7 --- xplanation is given for this at the present time. Large numbers of spawning carp ave been observed on numerous occasions, and live eggs of this species have been collected from Lake Diversion for laboratory study. Ripe females have been taken practically every month of the year. The major spawn occurs from early May through June. Ripe males are taken throughout the year, especially following rainfall. Ictalurus punctatus (channel catfish) Ripe females were taken in April, but spawning was deferred until May. No regular spawning pattern was followed by this species during this segment. lodictus olivaris rerathesd catfish) Only two female flatheads were taken, both of which were in a spent condition on April 30, 1957. Roccus chrysops (white 3 Very little was learned about spawning of this species during the study. Apparently, their spawning depends on such conditions as wind, rainfall and the operation of flood gates at Lake Kemp Dam. Young of the year (1 to 13 inches) were taken in seine drags in July. Micropterus salmoides (hiner bass) Ripe females were found in April. Young of the year were taken in seine hauls in July. Pomoxis annularis (white crappie) Ripe females were taken in April, and young of the year were taken in May. Aplodinotus grunniens (drum) Although previous studies at Lake Diversion have shown drum to be quite numerous, only nine were taken in gill nets. None of those taken were in spawning condition. The selective-kill proved drum to be very abundant. COEFFICIENT OF CONDITION "K" factors were worked out for all of the larger fishes taken in gill nets. Distribution of "K" factors for fishes in Lake Diversion is given in Table 10. In the report for the following segment, an attempt will be made to utilize monthly variations in "K" factor distribution as an indication of the effects of selective-kill treatments and other rough fish control methods. --- Page 8 --- EXPERIMENTAL SELECTIVE-KILL TREATMENT s Following ten months of inventory and study, Lake Diversion was treated in March, 1957, for an experimental selective-kill on shed and drum. A eoneentration of .3 pounds of 5% rotenone to the acre«foot of water {.10 ppm) wee distributed when the temperature of the lake was 55°F. A total of 10,320 pounds of rotenone was distributed over the entire surface of the lake. High winds and hard, driving rain during the time of treat- ment caused many difficulties and increased the time required for treatment. In spite of adverse weather conditions, however, the work was carried out as planned. Within an hour following the treatment, large numbers of both shad and drum began to work fihe surface in a moribund condition. After death, except for those that were washed ashore by wind and wave action, both shad and drum sank to the bottom. Later, most of the drum bloated and floated, whereas shad remained on the bottom in the cold water where they decomposed without rising to the surface. This was expected, however, because during laboratory experiments with water temperatures below 60°F both shad and drum sink to the bottom of the vats. Shad remain there until removed, whereas drum begin to surface after the fifth day. Since most of the fish that were to be killed by the treatment were not expected to float and make possible a total-kill estimate, wire baskets containing live shad were placed at various depths in the lake. They were spaced at five foot vertical intervals in the thirty foot depth water near the dam, and at four foot intervals in the eighteen foot water in the river channel near Rock Island. High winds prevented checking these live baskets until six days after the treatment. Two of the baskets had been torn loose from their moorings by wind and high waves, but all others remained in place. All shad in each basket were found to be dead and quite decomposed. Whether the test shad were killed by rotenone, weather conditions or some other cause, is a matter of speculation. The badly decomposed condition of shad in the baskets indicates that they were killed shortly after the treatment, however. One week following the treatment, when most of the dead fish that bloated and floated had been blown to the shore, an attempt was made to estimate the numbers of fish killed. Shifting wind had formed windrows of dead fish along the shoreline of the lake and islands. Due to their badly decomposed condition, average weights could not be determined; there- fore, it was necessary to determine their average length and compute average weight from "K" factor data collected immediately preceding the kill. Estimates were made by shoreline counts at random in 100 foot strips. Only representative;areas were considered- not coves where there were many, nor. points and protected areas where there were few. Total shoreline to be considered was determined by measuring the shoreline (including islands) on the most recent SCS aerial photograph of Lake Diversion. The resulting estimate was a minimum figure which did not include the followings 1. Fish picked up by fishermen and spectators during and following the treatment. 2. Fish eaten by other fish, pelicans, gulls, raccoons, ete, 3. Fish, especially shad, that sunk to bottom and did not float. The estimated total-kill according to the shoreline count as described above is as follows: --- Page 9 --- DRUM Average number per foot shoreline - 2.7 Average weight per drum - .5 lb. Total drum killed - 399,168 Total weight - 199,584.0 lbs. or 99.8 tons. The inventory of species in Lake Diversion during 1953 and 1954 showed the drum population to be 780,589. The shoreline count of dead drum following the kill was only 399,168, or approximately one-half the estimated total population of drum. Since 1200 feet of gill net in the lake produced only two drum in four days after the kill, the shoreline count is probably an underestimate. CARP Average number per 138 feet of shoreline - 1 Average weight per carp - 3.5 lb. Total carp killed - 1072 Total weight - 3,752 lbs. or 1.8 tons. CARPSUCKER Average number per 100 feet of shoreline - 2.6 Average weight per carpsucker - 1.8 lbs. Total killed - 3,843.8 Total weight - 6,918.8 lbs. or approximately 3.5 tons BUFFALO No buffalo’ bbserved in the count*areas. They were seen elsewhere, however, iand reports indicate many were picked up following the kill. GAR i g nT, i ! RY WOO No gar in the count areas, but they too were occasionally observed elsewhere in very small numbers. WHITE BASS Average number per LOO feet of shoreline - .7 Average weight per white bass - .5 lb. Total white bass killed = 1035 Total weight - 518 lbs. CRAPPIE Average number per 100 feet of shoreline - .2 Average weight per crappie = .1 lb. Total crappie killed - 296 Total weight - 30 lbs. --- Page 10 --- BLACK BASS No black bass observed anywhere CHANNEL CAT No channel cat in count areas - very few reported elsewhere. SHAD Impossible to count becasue they sunk immediately after death and did not float up to time of estimate. It is considered safe, however, to assume that at least as many shad were killed as drum. Approximately 400,000 shad killed. Approximate weight per shad - .4 lb. Total weight killed - 160,000 lbs. or 80 tons. NUMBER POUNDS TONS NO. /ACRE LBS . /ACRE ROUGH FISH SPECIES Shad 4.00 ,000 160,000 80 116.9 46.8 Drum 399,168 199, 584 99.8 116.7 58.4 Carp 1,072 3,752 1.9 3 1.1 Carpsucker 3, 84k 6,919 3.5 1.1 2.0 Bol, 08k 370,255 185.2 GAME FISH SPECIES White Bass 1,035 518 3 0.2 Crappie 296 30 0 0.0 “1,33 5h8 TO .16% total kill .21% total wt. 235.3 108.5 On March 22, two days after the treatment, gill nets were set in Lake Diversion to obtain additional data concerning effects of the treatment. A total of 1200 feet of experimental gill nets (1 inch mesh to 3 inch mesh), 200 feet of which were 16 feet deep, was set in the middle and lower sections of the lake. They were set below the surface to prevent catching dead fish that may be drifting on the surface. High winds and adverse weather conditions prevented crews from checking the nets until March 25, three days later. No shad and only 2 drum were found in the nets. Tabulated resulte of these nets sets are as follows; --- Page 11 --- Carpsucker -------------= 192 69.81% Buffalo----------------=- LT 17.09% Carp--------------------- 8 2.90% Drum------------------=--- 2 72% White bass--------------- 5 1.81% Channel Cat-------------- 9 3.27% Crappie------------------ 12 4. 36% 279 99.96% DISCUSSION : The treatment of Lake Diversion brought to mind several problems, the solutions to which are unanswered at the time of this writing. Accuracy of the total-kill estimate is very questionable in spite of the fact that the most applicable techniques known at the time of the treatment were employed. Much time, continuous study, and reports of fishing success from Lake Diversion sportsmen are necessary before the feasibility and benefits of the treatment can be ascertained. The estimate of shad killed is nothing more than a guess because it is not possible to count fish that are not visible. Although drum, as well as other species, were present along the shoreline to make possible a minimum estimation, it was not possible to include those fishes that remained on the bottom, those netted by spectating fishermen, and those eaten by surviving fish and other fish-eating predators. Observations of the bottoms of shallow, protected coves, as well as seining activities in the river above Lake Diversion, revealed great numbers of decomposed remains of both shad and drum which were %t included in the count. Stomachs of all catfish removed from gill nets five days ufter the treatment were gorged with remains of shad and drum. (Interesting to note is that no species other than shad and drum were represented in stomachs of catfish at that time, not even minnows). There are many discrepancies in sampling methods used at the present time. Gill nets of variable sized meshes are being employed to obtain relative abundance data be-= fore and after treatment. Although this method serves as an indication of the fish population, spot treatments with rotenone have proved gill net sampling to be greatly in error. Sampling with gill nets will be continued, however, in order to obtain com- parative data from which to determine effects of the selective-kill treatment. It was interesting to note that although no shad were caught in gill nets set continuously in the lake for three days following the treatment, they began to re- appear in greatly reduced numbers in gill net samplings in April and May. Only nine were caught in April and three in May (see Table 3). Several explanations are offered for their re-occurrence. Even if the treatment had killed all the shad, which is highly im- probable, reinfestation was eminent from the upper river and tributary streams which could not be treated. Lake Kemp is another possible source of contamination. After the Lake Diversion treatment, it was necessary to reduce the water level of Lake Kemp, which empties into the Big Wichita River above Lake Diversion. Two flood gates at Lake Kemp were opened to discharge 1,400,000 gallons per minute for twenty-seven days. If shad or any other species of fish can tolerate the sudden change of pressure from the bottom of Lake Kemp to the atmosphere below the dam, Lake Kemp is certainly a source of contamination for Lake Diversion. This possibility will be checked in the spring of 1958. --- Page 12 --- 10. Lake Diversion is an excellent body of water for experimental control of un- desirable species. Its fish population includes all game and rough fish species native to waters in the Wichita Valley. Complete control of its water level can be exercised by draining either through irrigation canals or through the dam, and re- filling at any time by opening flood gates at Lake Kemp. Thus, off-season migrations of rough fish species can be caused at any time by flooding the river above the lake. This will be very advantageous in future studies and experimental control of the river carpsucker. Authorization has been approved to continue this work until at least May 31, 1958. , _ Prepared by: Leo D. Lewis Approved by: Le (fp 4 pote Chief Aquatic Biologist Project Leader Date: April 14, 1958 --- Page 13 --- ake TABLE NO. 1_ PERCENTAGE COMPOSITION, SEX RATIOS AND AVERAGE WEIGHTS BY SEX OF FISHES COLLECTED BY GILL NETS FROM LAKE DIVERSION, 1956 - 1957 Species Taken |Total Males Weight Females Weight Lepisosteus osseus a7 | ng 4.0 | oo | wo | 2h Lepisosteus platostomus pkg ep.0 [2.8 [75.0 | _a.2 Tepisosteus productus | 0 | oo [| | o | Dorosoma_cepedianum Pure [a6 | ee | as {seu} a5 Cyprinus carpio rretaluras ponetatus [38] 3.0 | 55.3 | 158 | s.r | 2.68 Tt 180 Pomoxis annularis Aplodinotus grunniens Pylodictus olivaris \BLE NO. 2 PERCENTAGE COMPOSITION BY WEIGHT AND MEAN WEIGHTS OF FISHES COLLECTED BY GILL NETS FROM LAKE DIVERSION, 1956 = 1957 tepisosteus osseus_ | 166.1 Lepisosteus productus | Dorosoma cepedianum kL pl iO |r 4 Roccus chrysops i Micropterus salmoides a Pomoxis annularis — Aplodinotus grunniens Pylodictus olivaris Total --- Page 14 --- TABLE NO. 3 MONTHLY TOTALS OF SPECIES COLLECTED BY GILL NETS, 1956 = 1957. April May | Total|% of Species |No. | % No % | No otal | Snortnose ff pare er San nouth buffalo pefasfelisal a fool Eastman ee a oe oe alt tab al_t rs ee eee SEE , wihtelitat steel [ TP TET 1 Flathead catfish a a --- Page 15 --- 13. TABLE NO. 4 TOTAL NUMBER OF FORAGE FISHES TAKEN FROM LAKE DIVERSION, 1956 - 1957 Species Total Dorosoma Cyprinus N. percobromus N. lutrensis . deliciosus » buchanani . vigilax Cyprinodon Gambusia Roccus chrysops Micropterus L. cyanellus » microlophus . macrochirus - humilis - megalotis TABLE NO. 5 TOTAL NUMBER OF FISHES TAKEN FROM LAKE DIVERSION, 1956 - 1957 Species Total Lepisosteus platvostomus _Lepisosteus osseus 37 Dorosoma 485 Ictiobus bubalus L75 Carpiodes 369 Cyprinus 32 N. percobromus 27 N. lutrensis 870 N. deliciosus 19 N. buchanani Ld P. vigilax 343 Ictalurus punctatus 38 Pylodictus olivaris 2 Cyprinodon 8 Gambusia 16 Roccus chrysops 80 Micropterus 15 L. cyanellus 6 L._microlophus 16 L. macrochirus 36 L. humilis 8 L. megalotis 9 Pomoxis annularis 68 Aplodinotus grunniens CD --- Page 16 --- 14. . TABLE NO. 6 CHEMICAL NATURE OF THE WATER AT LAKE DIVERSION eee Total Date Calcium Sodium Chloride Sulfate Carbonates Bicarbonates Salts HH AE AGS varbonates Bicarbonates Salts pH 7/27/56 482 420 804 878 6 73 2663 - 11/2/56 316 552 799 749: ) 102 2518 7.85 12/10/56 306 539 880 629 @) 55 2h09 7-9 1/7/57 310 552 892 595 0 122 2h71 8.2 2/5/57 386 564, 888 811 12 90 2751 8.0 3/8/57 280 504 809 614 12 55 227k 8.12 4/30/57 278 510 755 567 12 168 2290 z 5/27/57 182 26h, 490 2ho 12 8h. 1272 8.13 rr --- Page 17 --- TABLE NO. 7 PHYSICAL CONDITIONS OF LAKE DIVERSION WATER, 1956 - 1957. CS enn nner ssn eunnnnntneeverenneerenerneres Date Air Temp. Water Temp. Turbidity (mm. ) 7/27/56 8k. 9/11/56 92 11/2/56 64. 12/4/56 62 12/18/56 55 2/5/57 45 3/8/57 61 4/30/57 67 5/27/57 79 395 470 460 860 730 1000 plus 790 790 890 et nnn eens --- Page 18 --- 16. TABLE NO. 8 FOOD REMAINS FOUND IN STOMACHS OF 37 SPECIMENS FROM LAKE DIVERSION. Frequency of Total Number Food Item Occurrence Identified White Bass Shad (Dorosoma) 5 5 Fish remains 6 10 Mayfly (Hexagenia) 11 601 # Terrestrial plant seed 2 2 Black Bass Crappie (Pomoxis) 1 1 Sunfish (Lepomis) 1 1 Fish remains 3 y Plant remains 1 1 Crappie Shad (Dorosoma) 1 1 Mayfiy (Hexagenia) 2 ; 395 # Channel Cat Fish remains 1 1 Crayfish i 1 Mayfly (Hexagenia) 8 1 3/4 # lbs. Flathead Catfish Fish remains 1 8 --- Page 19 --- 17. sABLE NO. 9 REPRODUCTIVE POTENTIAL Date Collected Length of Fish Weight of Fish Total Number of Eggs Lepisosteus platostomus 4/30/57 665° mm 1730 g 18,671 Lepisosteus osseus 4/30/57 900 mm 2800 g 23,14) 4/30/57 1180 mm 8165 ¢ 66,528 4/30/57 955 mm 3000 g 19,656 Dorosoma cepedianum 3/28/57 300 mm 690 g ioe 340, 636 Carpiodes carpio 3/8/57 310 mm 875 g 139, 481 9/8/57 288 mm 760 g 152,760 Ictiobus bubalus /h , 3/8/57 325 mm 11158 aa 69,495 3/8/57 4OO mm 2160 g ¥.P6 >) 212,968 4/30/57 395 mm 2110 g Lor 143,212 4/30/57 320 mm 1175 g 2.59 81,516 Cyprinus carpio 3/28/57 470 mmm 2975 Blase 563,018 Ictalurus punctatus 4/30/57 395 mm 1120 g 12,284 --- Page 20 --- 18. TABLE NO, 10 DISTRIBUTION OF "K" FACTORS FOR LAKE DIVERSION 1956 - 1957 Lepisosteus platostomus Factor 5 6 Males L Females 1 2 Lepisosteus osseus Factor 3. 0 6 (OA 5 Males ho 15 Females 3 13 1 Dorosoma cepedianum Factor 1.2 1.3 1.4 1.8 1.6 1.7 1.8 1.9 @&O0 2.1 2.2 3.3 2.4 Males 2 - 1 2 17 30 38 52 44 13 5 + 1 Females - 1 - 10 22 47 #55 59 He 19 12 2 1 Carpiodes carpio Factor 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3. 3.4 3.5 3.6 Males 2 1 5 13 17 #31 34 2 35 15 9 6 2 1 Females - - 5 7] 2 2 21 23 20 16 1 7 5 1 2 Ictiobus bubalus Factor 2.5 2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 4.o hie Males 1 3 8 12 1 13 #38 dw ilo du 4 3 Females - - 8 9 3 8 10 6 k 8 2 3 1 - - - 1 Cyprinus carpio Factor 19 2.0 2.1 2.2 2.3 2.4 2.5 26 2.7 2.8 2.9 Males - - 1 2 1 4 3 2 - 1 i. Females 1 - - - 1 3 1 h 1 4 1 Ictalurus punctatus Factor 1.11.2 1.3 14 1.5 1.6 1.7 1.8 1.9 2.0 2.1 Males - - - - 5 6 5 Pe a - 1 Females lL - 5 2 4 3 3 « - - Pylodictus olivaris a Factor 1.4 1.5 1.6 Males - - - Females 1 - 1 --- Page 21 --- ‘ABLE NO. Factor Males Females Factor Males Females Factor Males Females Factor Males Females LO | coal HHO HED DISTRIBUTION OF "K" FACTORS FOR LAKE DIVERSION (continued) Zod. Mh PO Pw 2. 1 Pru 1.9 ' Rw 2 2. d. tHE 1g. Roccus chrysops 5 2.6 7 3 1 6 3 2.4 2. 2.7 2. 7 8 4 1 6 1 4 Micropterus salmoides 2.7 Pomoxis annularis 2.2 2.3 2.4 2.5 6 4 3 4 2 4 #5 9 WHE Aplodinotus grunniens 2. Rew 8 2 y) 2. 2. 6 \ a 2 3 3. 2. 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