TPWD 1958 F-5-R-5 #365: Report of Fisheries Investigations: Basic Survey and Inventory of Species Present in the Pecos River of Texas, Dingell-Johnson Project F-5-R-5, Job B-13

--- Page 1 --- Report of Fisheries Investigations Basic Survey and Inventory of Species Present in the Pecos River of Texas by Lawrence Campbell Project Leader Dingell-Johnson Project F-5-R-5, Job B-13 April 16, 1957 - April 16, 1958 H. D. Dodgen - Executive Secretary Texas Game and Fish Commission Austin, Texas Marion Toole Kenneth C. Jurgens & William H. Brown Coordinator Assistant Coordinators --- Page 3 --- Job Completion Report State of TEXAS Project No. F-5-R-5 Name: Fisheries Investigations and Surveys of the Waters of Region 3-B. Job No. B-13 Title: Basic Survey and Inventory of Species Present in the Fecos River of Texas. Period Covered: April 16, 1957 - April 16, 1958 Abstract: The Pecos River of Texas was found to be a highly saline stream which is divided into three main ecological associations. The upper reaches of the river are characterized by turbid, intermittent pools. In the middle reaches of the river are sluggish pools, which are long, deep and infested with vegetation. The lower river, to its confluence with the Rio Grande, is spring fed and has permanent flow. During the study period, the most im- portant fish species in the upper reaches were the white bass and gizzard shad while channel catfish and minnows were the most important species in the remainder of the stream. In all, forty-nine species of fourteen fish families were identified. Pollution, public access and water conservation practices were found to be the primary fishery problems of the river. It is recommended that work be done to solve these problems, that experimental stock- ing be continued, and that a future means of utilizing the salt playa lakes and the potential stream areas in the mountains be sought. Objectives: To gather fundamental data on the above waters in regard to their physical, chemical and biological aspects. To determine the distribution of fish species present, their relative abundance and the ecological factors influencing their distribution and production. Cooperating agencies: Texas Board of Water Engineers United States Geological Survey Red Bluff Power and Water Control District International Boundry and Water Commission Procedure: A. Basic Survey Standard procedures were employed to secure the information necessary to complete stream survey forms similar to those given by Lagler in his HANDBOOK OF FRESHWATER FISHERY BIOLOGY. --- Page 4 --- B. Inventory of Species Twenty-eight seining stations were established to determine the fish species present, their distribution, and their relative abundance. 1. Attempts were made to collect fish at each seining station more than once but because of changing stream conditions this was often impossible. 2. Gill net collections were taken whenever access permitted and the stream was sufficiently deep and clear of vegetation or obstructions. 3. At appropriate intervals in the stream areas worked, water analyses were made and recorded along with other data pertaining to water quality and condition including pH, air and water temperatures. 4, Where field identification of fish specimens was in doubt, individuals were preserved in 10% formalin and examined in the laboratory. 5. The portions of the watershed not covered in this survey were confined to the Davis Mountains Area. Findings: The Pecos River rises in Mora, Santa Fe, San Miguel, and Torrance Counties of New Mexico. Its contributing watershed above the Texas-New Mexico Border contains about 20, 239 square miles. The average discharge into Red Bluff Reservoir is about 315.6 c. f. s The watershed is characterized by short grasses and very arid sandy plains. It is the desert or semi-desert that was a barrier to westward migration and development about one hundred years ago. It is the Llano Estacado of history. The mountains that rise out of this desert are known as the Santa Fe Mountains and are a part of the Rocky Mountain System. A series of reservoirs beginning with Nichols Reservoir on Santa Fe Creek and including Almogordo Reservoir, Lake McMilian, and Lake Avalon regulate stream flow into Texas. These reservoirs have a combined storage capacity of 182,000 plus acre feet. Diversions and ground-water withdrawais above the state line provide irrigation for 181,500 acres of New Mexico farm land. Most of the water entering Texas from the Upper Pecos River is controlled by the Red Bluff Water Power and Control District with offices in Pecos, Texas. Except for an unknown portion of the quantities of local run-off, insignificant seepage, and slight contributions from springs into the river; all stream flow is controlled by Red Bluff Reservoir. This reservoir has a potential storage of 307,000 acre feet volume and has not been filled to spillway capacity since its construction in 1937. For convenience in description of the various portions of the watershed and the stream and because of the difference in the ecological aspect of the watershed and stream, it was surveyed in a southward direction. The area worked was arbitrarily subdivided into three sections. Detailed data on hydrology*and chemical content*Sre included in appropriate charts. The following descriptions are intended only to provide a general description of the regions. From Red Bluff Reservoir a vast irrigation system, of an estimated 128 miles of canals and laterals, branches out to irrigate about 21,000 acres, most of which are located between Mentone and Imperial, Texas. Permanent earthen and concrete diversion dams and, brush dams for temperary use, channel the released water from the river bed to its destined area. A 1,000 acre foot control reservoir is employed for temporary storage and is located in a bend of the river about ten miles northwest of Imperial. % See Tables I, II & III. %*% See Table IV. --- Page 5 --- On the flats at the base of the Guadalupe Mountains below Sierra Diablo, South of Pecos, and to a lesser extent throughout this region, natural playa salt lakes such as Lake Toyah occur. These lakes are devoid of fish life. Alkaline marshes are often adjacent to the stream and discharge large quantities of chlorides into the river bed. An example of the extent of this discharge is the 274 tons per day that are estimated to be discharged into Red Bluff reservoir on occasions. Above Imperial the stream is characterized by intermittent pools that are often created and maintained by the previously described diversion dams and by natural depressions in the river bed. During inventory, only two streams were encountered in this region where any stability of flow was observed. A tributary of Delaware Creek, located in the Guadalupe Mountains in McKittrick Canyon on the J. C. Hunter ranch was maintained by springs and seepage for about fourteen miles before it entered a porousformation about seven miles west of the Van Horn-Carlsbad highway near Pine Springs. This was private stream and was apparently successfully producing trout fishing for the owners. At present it has no significance in considering stream management for the river. A number of springs such as Maderia Springs, San Solomon Springs and others provide flow into Balmorhea Lake, an irrigation reservoir near that city. Because of the premium placed on water for irrigation, no consideration has been given to fishery management; and fluctuations in this reservoir prevent it from providing any significant fishery yield. It does not contribute to the river at any time. This stream area is unstable and offers little opportunity for fishery development. Pools in the stream are usually turbid, low in oxygen and high in carbon dioxide content, are saline and have silty bottoms. secause of fluctuation vegetation as saw grass, (Zizaniopsis sp.), and cattails (Typha sp.) are not management problems. The stream banks are usually moderately steep, but are often covered with salt cedar to such an extent that access is very difficult. From Imperial to Sheffield the stream is characterized by large pools through which a minimum flow is usually maintained, although such flow is often through gravel deposits between pools. The stream is much deeper and is permanent in nature. Dense vegetation makes sampling by seines or nets extremely difficult. Chara (Chara sp.), coontail (Cerataphyllum sp.), and parrots feather (Myriophyllum sp.) are the principal types. Cattails, saw grass and bullrushes are also abundant in localities. The water is still highly saline; however, it is clear and there is no deficiency in oxygen or carbon dioxide content. Severe and extensive pollution from oil fields occurrs from Girvin to Bakers- field to Sheffield. This will be discussed later under that heading. Redfish were released in this area and have survived. From Sheffield to the river mouth the stream is characterized by spring fed associa- tions. Independence Creek, Live Oak Creek, and others provide permanent and significant flow. Access is extremely difficult because of the banks which often are over one hundred feet above the river bed. There is no vegetation excepting algae and other pelagic aquatics. The stream bed is rock or coarse gravel. The water is unusually clear and the dissolved oxygen and carbon dioxide content is very favorable for fish life. This third area has a larger quantity of water than the combined totals for the other areas described, has more and better game fish populations, and offers excellent management prospects. However, public access is not available at this time. The following charts are regarded as the best expression of water quality and hydrol- ogy for the river during the survey period. (See Tables I through IV) --- Page 6 --- Historical Change - The following information or comment is included to briefly illustrate the changes that have taken place and to designate their effect on fish life and on the prospects for future fishery development. In 1849, a Lt. French, while en- gaged in finding suitable travel routes through western Texas, described the Pecos River as "a narrow deep stream, its waters turbid and bitter, and carry, in both mechanical mixture and chemical solution, more impurities than any other river in the south. The only inhabitants of its waters are catfish". Others of that period describe the river as being too deep and swift for safe crossing except at "Horsehead Crossing" near Imperial. Many springs Comanche, Leon, White Sands, Ojo Escondidio, Madeiria, and many others provided permanent stream flow, and the ground water was contributing in much of the area. After the settlement of the country, all of these waters were used in irrigation. This development and exploitation of the rivers sources has continued until today. None of the above springs are contributing; the ground water is at least eight or ten feet lower than it was at the turn of the century and the exploitation is continu- ing at a rapid pace. (See attached map) Pollution - As illustrated by the above description, the Pecos has been polluted by salt possibly since its creation. This natural pollution results primarily from fractures or faults in subsurface formations that permit the percolative action of ground waters to deposit these minerals into the stream. Alkali deposits on the surface add mineral to run-off, and salt springs that are naturally formed by aquifers are also contributive. Man made pollution is primarily from two sources. Oil field exploration and development for the past thirty years have resulted in both surface and subsurface release of petroleum and salt water and other materials that are injurious to fish life. Many dams and dikes that are constructed to retain oil well waste become full and overflow with run-off; wast. leak from production procedures; subsurface pollution occurs from wells improperly sealed. A man near Iraan, Texas, makes his living from skimming the oil off the surface of the stream that has leaked or has been lost from wells in that area. The complexity of this problem on the river between Grandfalls and Sheffield would require an extensive study and costly equipment. Probably two men for a year or more. Pollution also occurs from agricultural methods. Crop dusting or spraying is carried out extensively and some of the substances used are residual in nature and are carried by run-off into the stream in sufficient concentrations to cause fish kills. Unplugged wells where responsibility can not be fixed are present. Fish Populations: Twenty eight stations on the stream were netted or seined. Because of stream conditions, it was often impossible to duplicate exactly (in instances where two collec- tions were made at a particular station), however, every reasonable effort at duplication was made. Forty-nine species of fourteen families were positively identified and at least six additional species are believed to be present. The following annotated check- list is regarded as the better information pertaining to species distribution. Tables VI and VII are primarily for relative abundance. Other aspects of the fish populations are covered under trends and influences. --- Page 7 --- Annotated Checklist of Species of Fish in The Pecos River of Texas Lepisosteidae (gars) Lepisosteus osseus (longnose gar) - common and abundant in localities. The most numerous and widely distributed species for this group. Lepisosteus productus (spotted gar) - rare found only in the upper and primary stream and there only below Grandfalls. Lepisosteus spatula (alligator gar) - taken only near the mouth of the river and probably does not occur more than five or ten miles north of the Rio Grande. Clupeidae (herrings) Dorosoma cepedianum (gizzard shad) - common and abundant throughout the watershed, one of the most important forage species, possibly the greatest population by weight. Salmonidae (trouts) Salmo gairdneri (rainbow trout) - McKittrick canyon in the Guadalupe Mountains only. There is evidence that this species is reproducing successfully; however, the original stock were imported from New Mexico in 1929. Characidae (tetras) Astyanax fasciatus (banded tetra) - common below Sheffield and rare but present to Red Bluff Reservoir. Extreme fluctuation in population in localities. Catostomidae (suckers and buffalofishes) Cycleptus elongatus (blue sucker) - common near the mouth but restricted to that area. Ictiobus bubalus (smallmouth buffalo) - rare but present as far north as the Texas-New Mexico line. Moxostoma congestum (gray redhorse sucker) = common and distributed more or less uniforn- ly throughout the watershed. Carpiodes carpio (river carpsucker) = common and abundant except in the last few miles near the mouth of the river. Cyprinidae (shiners and minnows) Cyprinus carpio (German carp) - common and abundant on a locality basis. More abundant in the upper one half of the watershed. Carassius auratus (goldfish) - introduced and rare. Taken near Imperial. Notemigonus crysoleucas (golden shiner) - rare, but fairly widely distributed. Probably introduced by hatchery release. --- Page 8 --- Hybopsis aestivalis (speckled chub) - rare, taken from Independence Creek only. Phenacobius mirabilis (suckermouth minnow) - extremely rare, regarded as released by bait dealers. Notropis percobromus (plains shiner) - taken in the upper watershed as far south as Buena-Vista»Crane highway crossing. Notropis venustus (spottail shiner) - restricted to the mid areas of the watershed abun- dant only on Chandler Ranch near Sheffield. Notropis lutrensis (redhorse shiner) = common and abundant, the most numerous, important, and widely distributed forage species for the watershed. Dionda episcopa (roundnose minnow) - the dominant minnow in most of the area where it occurs. Found below Sheffield. Hybognathus placita (plains minnow) = rare and confined to the upper one third of the watershed. Pimephales vigilax {parrot minnow) - common but not numerous above McCamey. \ Campostoma anomalum (stoneroller) - taken in Independence Creek and at the mouth of the river only. Ameiuridae (catfishes) Ictalurus punctatus (channel catfish) - the most common and widely distributed of this group. Prebably the most important game species for most of the watershed. ictalurus furcatus (blue catfish) - taken near the mouth only. Abundant in that area. Ictalurus natalis (yellow bullhead) - rare in the stream areas below Imperial, but very abundant above that area. Ietalurus melas (black bullhead) - confined to localities but abundant where found. Pylodictus olivaris (flathead catfish) = common but never numerous. Cyprinodontidae (killifishes and topminnows ) Fundulus kansae (plains killifish) - common and distributed throughout the upper two thirds of the watershed. Fundulus sp. (Pecos River killifish) - presumably an undescribed species. Found at Wink Lake, at several stations near Imperial and Grandfalls. Cyprinodon variegatus (variegated cyprinodon) - taken near Imperial and presumably in- troduced. Cyprinodon bovinus ‘Leon Springs pupfish) - not found but listed in the literature for this watershed, presumed extinct. --- Page 9 --- Cyprinodon elegans (Comanche Springs pupfish) - not actually collected and identified but taken from Hubbs checklist. Cyprinodon sp. (Pecos River pupfish) - common in the upper watershed. Poeciliidae (mosquitofishes) Gambusia nobilis (Pecos gambusia) - common in upper watershed. Gambusia affinis (mosquitofish) - common throughout watershed. Mugilidae (mullets) Mugil cephalus (striped mullet) - not actually taken but reported from the mouth of the Pecos. Serranidae (basses) Roccus chrysops (striped bass) - common and when conditions permit, the most important game species for the watershed. Centrarchidae (black basses and sunfishes) Micropterus punctulatus (spotted bass) - rare and this may be a case of misidentification. Micropterus salmoides (largemouth bass) - rare but widely distributed. Chaenobryttus gulosus (warmouth bass) - common but never numerous. Lepomis cyanellus (green sunfish) - common and abundant found throughout the watershed. Lepomis microlophus (redear sunfish) - common but never numerous in the upper watershed. Not taken near mouth. Lepomis macrochirus (bluegill sunfish) - common and abundant. Probably the most numerous species of this group. Lepomis humilis (orange spotted sunfish) - common but never abundant. Lepomis auritus {yellowbelly sunfish) - common in the upper watershed as far south as Traan, but never abundant. Lepomis megalotis (longear sunfish) - common and abundant. Some evidence of hybridization in a number of individuals. Pomoxis annularis (white crappie) - rare and localized in distribution. Percidae (perches and darters) dadropterus sp. (Pecos darter) = presumably an undescribed species of this genus. Percina caprodes (logperch) - found primarily below brush diversion dams in the upper watershed. Rare. --- Page 10 --- Sciaenidae (drum and weakfishes) Aplodinotus grunniens (freshwater drum) = common, but more abundant in the upper portions of the reservoir. Sciaenops ocellata (redfish) - rare, known to be released by the Texas Game and Fish Commission, confined to the area near Imperial. Cichilidae (cichlids) Cichlasoma cyanoguttatum (Rio Grande cichlid) - common from Balmorhea to mouth. B. Trends and Influences of the Principal Fishery Populations. Killifishes and topminnows - In all areas where the stream was intermittent or where salinity was unusually high, these fishes were quick to gain dominance. In several instances where stations were rechecked it appeared that more desirable forage and game species quickly disappeared as salinity increased with a reduction of water volume in stream pools, and there was a remarkable increase in the numbers of these species. It also appeared that killifishes could tolerate crowding to an extent where there may have been an actual increase in total fish per unit volume. (The weight of killifishes and pupfish in a reduced volume may have exceeded the total weight for all species in a greater volume under different conditions.) The utility of these fish as forage for game species is undetermined, however, they have been recovered from stomachs of the redfish that were released near Imperial. The apparent ecological succession for the upper watershed appears to be a reduction of killifishes during periods when sustained run-off occurs and for a short period following this phenomena and a gradual and at times a rapid recapture of dominance by this group from game species and from minnows and shiners. Minnows and shiners = These populations and their relative density were apparently controlled by three variables. Of primary importance was stream flow and its stability, however, in some localities natural salinity and in many others salt pollution were detrimental. Pollution as discussed elsewhere also apparently controlled the game fish populations. Suckers, carp and other species of questionable benefit - As in virtually all stream areas in the region, river carpsuckers were excessive in much of the stream. However, where flow was stabilized and where the stream was unpolluted suckers, carp, and other undesirable species were not dominant. Blue suckers in the lower stream were numerous, but apparently catfishes were able to compete successfully. Gizzard shad and white bass - In the upper stream areas when run-off occurred or when periodic releases were made from Red Bluff Reservoir or Imperial Reservoir, the flow thus created had tremendous effect upon the spawning and growth rate for these species. When flow was created in the spring, extensive schools of shad were observed and during the following fall and summer white bass fishing results were excellent. Sampling before and after this phenomena confirmed this occurrance. White bass fishing can for practical purposes be considered to be the only significant fishery yield for all stream areas above Sheffield, Texas, and as previously stated this yield is virtually dependent upon uncertain and infrequent occurrances of stream flow. Further evidence of the cycle of --- Page 11 --- tremendous increase and reduction is apparent in the lower stream where populations remain relatively constant as a result of stabilized stream, flow. In these areas neither shad nor white bass are dominant in their ecological station or position. It is regarded as possible that the recession phase (the cession of flow, the withdrawal of and reduct- ion of stream pools) is as important in producing this rapid and unpredictable production of utilizable fishery yield as is the opposite flood stage. Catfishes and largemouth bass - Blue catfish dominate the area near the mouth and for a number of miles upstream; however, channel catfish are the more important for virtually all of the watershed. Flathead catfish are of lesser importance. Largemouth bass with the exception of one or two localities are of no importance on a watershed basis, and since these fish are released from the hatcheries almost every year, it is assumed that the complex of many factors prevent this species from either maintaining or developing into any fishery asset. Redfish - Approximately 500 redfish or channel bass were released by the Game and Fish Commission near Imperial, Texas, in 1955. Of this number, claims of about 200 recaptures have been made. None of these fish were captured during the last year of study, however, a report of one reaching a length of 27 inches was received indirectly and was supposedly captured about 14 stream miles from the point of release. A number of individ- uals recaptured by sportsmen and mailed to the marine biological staff for appraisal indicated that these fish were in excellent condition and had grown faster than fish of the same species spawned at approximately the same time on the coast. An experimental restocking is recommended and requested under a different job for the coming years work. Summary: 1. The Pecos River is divided into three general ecological types. (a) the upper watershed area, between Red Bluff Reservoir and Imperial, Texas, is characterized by turbid saline pools of extreme fluctuation. (b) the mid-watershed area, from Imperial to Sheffield, is characterized by long deep pools of sluggish flow connected by gravel bars and infested with dense concentrations of aquatic vegetation. This area is more stable but is subjected to almost constant pollution from oil fields and through ag- ricultural processes. (c) the lower Pecos, the area from Sheffield to the confluence with the Rio Grande, is characterized by spring fed associations, gravel and rock bottoms, and unusually clear waters. 2. All of the waters of the Pecos are relatively high in chlorides and there seems to be some correlation between salinity and species distribution. 3. The most important forage species for the upper Pecos is the gizzard shad and the most important game species is the white bass. These populations have extreme fluctuation in response to stream conditions. 4. The most important forage fishes for the middle and lower Pecos are shiners and minnows and the most important game species is the channel catfish. Blue catfish dominate the mouth of the stream. 5. The utility of the heavy populations of cyprinodons as forage is questionable, Nowever, they were utilized to some extent by channel bass released near Imperial on an experimental basis. --- Page 12 --- LO. 6. The high premium on water for irrigation has decreased the upper stream flow to a point where it is nonexistent much of the time. Many historic springs that originally supplied the stream are no longer productive for various reasons, and public access is confined to insignificant and unproductive stream areas. Recommendations and Conclusions: It is concluded that because of the water conservation and utilization practices employed in the upper watershed nothing can be done at present toward development of fishery resources in that portion of the stream. Emphasis should be placed on reservoir management since these are public waters. The middle and lower Pecos offer many more potentialities for development work; however, until public access is obtained and pollu- tion more adequately controlled, only experimental work such as the introduction of suitable marine species like the redfish or the channel bass should be attempted. It is further recommended that future development and survey work be concentrated toward ob- taining public access and toward controlling pollution. If these problems are resolvec. appropriate, vegetation control and fishery management procedures can be employed to increase game fish production and to aid in the fishery yield. Extensive study and investigation is also needed to determine if streams or reservoirs in the Davis, Guadalupe and other mountains may be practical, and when time permits that work should be done. Further study is also needed to determine if the playa salt lakes of the region can be made to be productive in any manner since these are potential resources that may in the future be the only waters available for fishery management or for development. Any success in that endeavor would or could materially increase the potential resources for the south- west. c y f p eget 6 Prepared by Lawrence Campbell Approved by Darrow AS? A Project Leader Director Inland Fisheries Division Date May 20, 1959 --- Page 13 --- Table I. Month L955 October November December 1956 January February March April May June July August September October November December 1957 January February March April May June July August September Drainage area is 19,540 square miles. The average discharge for a 19 year period is 203,400 acre feet per year. Maximum Discharge Cf Ss 5730 138 138 Th 66 39 25 904 246 2,450 33 Minimum Discharge @.f.8. 87 82 104 82 29 31 35 23 22 29 26 25 Tal 32 55 ll. Average ~ Discharge c.f.s. 767.0 111.0 118.0 96. 52. 5h. 43, 39. 30. 3h, 30. 30. 52. yh, 6h. NPA OF FE NME FOW 66. ho. 22 19. 53. 25. 18. 122. 28. WO ANANW FE ©FO Number of Days No Flow eoene) O9OOCOCCOCOCOCCO0O0 OOOO 0CCO00 Percent of Time No Flow loexe) OODDOOOCO0O0C00 oOo0o0O000 00 Hydrology and Fluctuation of Flow Data for the Pecos River at Red Bluff, New Mexico from October 1955 through September 1957. Run-off in Acre Feet 47,150 6,620 7,270 3920 2,990 3,340 2,570 2,410 1,790 2,110 1,870 1,830 3, 2h0 2,630 3,980 4,120 2,20 1,400 1,140 3,270 1,530 1,140 7,920 1,700 --- Page 14 --- Table II. Month 1055 October November December 1956 January February March April May June July August September October November December 1957 January February March April May June July August September Averages Hydrology 115. 115. 116. 116. O FU OU ONWO MON MW DOAK OANOO 12. and Fluctuation Data for Red Bluff Reservoir for the Period « Els 9 from October 1955, through September 1957. Min. El. Avg. Fluc. Avg. Acre Feet 96.7 105.9 18.4 55,900 115.1 115.3 0.4 95,500 115.5 115.85 0.7 97,900 116.3 116.5 0.4 101,500 116.8 116.85 0.1 103,200 116.3 116.55 OW5 101,700 112.7 Tik.3 3.2 91,700 111.0 111.65 1.3 78,400 107.0 108.8 3.7 66 , 700 100.7 103.8 6.3 48,500 95.1 97.8 5.4 33,980 92.2 93.1 1.8 2h. ,900 91.9 92.2 0.6 23,620 92.9 93.1 0.5 25,070 93.5 94.2 1.5 26,960 95.0 95.5 1.0 29,430 83.5 89.3 1.5 19,490 83.5 84.8 2.7 14,000 86.2 86.6 0.6 16,010 85.4 86.3 1.7 15,660 88.9 89.3 OT 19,490 88.0 88.5 0.9 18,450 88.6 92.7 8.2 2h , 400 87.9 90.0 6.3 22 , 300 83.5 100.2 3.3 %58 145 * Maximum acre feet was 103,500 in February of 1955. Minimum acre feet was 12,750 in February of 1957. --- Page 15 --- Table III. Month 1955 October November December 1956 January February March April May June July August September October November December 1957 January February March April May June July August September 13: Hydrology and Fluctuation of Flow Data for the Pecos River at Girvin from October 1955 through September 1957. Maximum Minimum Average Number Percent Discharge Discharge Discharge of Days of Time C.f 8s C. fis @.£ Ss No Flow No Flow 156 2h 40.6 re) fe) 30 23 2h.7 @) fe) 36 26 27.7 0 fe) 61 36 13.7 ) fe) 48 40 YY. 3 @) fe) yo 34 38.8 0 re) 36 15 25.7 0 0 18 10 12.6 @) fe) 12 9 10.7 0 ) 12 11 18.9 0) fo) 34 10 13.6 0 O hg 11 15.5 0 0 105 12 21.6 O o) 2h 23 23.6 0 fe) 25 23 24.1 @) ) 2k 21 22.2 0 fe) 115 22 Su.7 @) ) 111 25 43.2 0 0 2,2k0 25 142.0 0 0 390 20 46.9 ) @) 93 15 27.0 O 0 51 14 18.0 fe) fe) 26 14 14.8 O O 154 12 19.7 ) 0 Drainage area is 29,560 square miles. The average discharge for a 17 year period is 122,400 acre feet per year. Run-off in Acre Feet 2,500 1,470 1,710 2,690 2,550 2,390 1,530 Thy 632 1,160 539 922 1,330 1,410 1,480 1,370 3,040 2,660 8,480 2,680 1,600 1,100 910 1,170 --- Page 16 --- Lite Table IV. Water Quality Data for the Pecos River. Air Surface Oo COo Cl Dissolved Total Location Date Temp. Water pH PPM PPM Date PPM Solids Hardness Temp. Pecos River October October near Orla, 1955 82 Th 8.4 6 13 1946 2,300 6, 330 2,080 Texas May May 1956 70 69 8.1 8 7 1955 1,650 5,180 1,940 September September 1957 87 76 8.6 1.6 15 1957 3,490 9,050 2,640 Toyah Creek October near Pecos, -- -- -- -- -- -- 1946 2,060 8,160 2,580 Texas May -- -- -- -- -- -- 1955 262 2,440 1,520 Pecos River October October near Grand 1955 8h ¥ is] 8.6 4 15 1946 3,780 10,500 3,320 Falls, Texas May April 1956 Th 68 8.1 10 5 1955 4,030 10,600 3,280 September September 195 fT 82 78 8.2 11 4 1957 3,900 10,800 3,210 --- Page 17 --- 15. Table IV. Water Quality Data for the Pecos River (Continued ) Air Surface ie) C02 Cl Dissolved Total Location Date Temp. Water pH PPM PPM Date PPM Solids Hardness Temp. Pecos River October October near Girvin, 1955 86 74 7.6 Bi O 1946 4. 700 12,500 3,770 Texas May April 1956 70 70 7.8 h LO 1955 9, 130 13,300 3,920 September September 1957 82 76 7.4 3 8 1957 5,300 14,100 4,180 Pecos River May October near Sheffield, 1956 74 70 7.3 10 O 19h6 3,610 9,510 2,760 Texas September May 1957 82 76 Tel 10 1 1955 3,910 9,970 2,990 September -- -- -- -- -- -- 1957 3,830 9, 840 2,790 --- Page 18 --- 16. Table V. Collection Stations on the Pecos River. Station No. 1. Below Red Bluff Dam 2. Mouth of Screwobean Draw, 3 miles below Red Bluff Dam 3. Pasotex Pipe Line Crossing, 6 miles southeast of Orla 4, Mentone Crossing Bridge on Ranch Road 302 5. Ward County Water District No. 3, Diversion Dam 6. Ward County Irrigation District No. 1 7. Highway 80 Bridge in Pecos 8. Big Valley Ward County District No. 2, Diversion Dam 9. Stream crossing 15 miles south of Ward Diversion Dam No. 2 10. Pecos County Water District No. 2, 600 feet below Diversion Dam, 18 stream miles above Grandfalls Crossing 11. Ward County Water District No. 2, 4 mile above Reeves-Pecos County Line 12. Pecos County Water District No. 2, Diversion Dam No. 2 at Royalty Crossing 13. Grandfalls Crossing 14. Pecos County Water District No. 3, Diversion Dam, Zimmerman or Imperial Reservoir 15. 4 miles above highway bridge on Ranch Road 1053 16. Buena Vista-Crane Farm Road Crossing 17. Girvin Highway, 2 miles east of Girvin 18. Highway 305 crossing Iraan-McCamey Road 19. Highway 51 crossing Rankin-Iraan Road 20. Brooks Ranch 4 miles north of bridge on Highway 290, Ozona-Sheffield highway 21. Highway 290 bridge 22. Hugh Childress Ranch, 14 miles south of Sheffield 23. Mouth of Independence Creek on Chandler Ranch 2h. Pandale Crossing 25. Mouth Howard Draw on Al Mills Ranch 8 miles south of Pandale 26. Bud Mills Ranch 4 miles west of Pandale 27. Marty King Ranch 4 miles east of Comstock-Langtry Bridge 28. Marty King Ranch at Comstock-Langtry Bridge 29. Marty King Ranch at mouth of Pecos River Collections From Principle Tributaries Wink Lake at Wink Toyah Creek Springs at base of Timber Mountain 5 miles west of Balmorhea State Park at Balmorhea Lake Balmorhea Comanche Creek Comanche Springs above Lake Leon Crossing of Comanche Creek between Ft. Stockton and Imperial on Highway 1053 Independence Creek Independence Spring 1 mile above Dryden-Sheffield Bridge on Highway 1217 Dryden-Sheffield Bridge on Highway 1217 1 mile below bridge on Highway 1217 --- Page 19 --- ly. Table VI. Netting Collections on the Pecos River and its Tributaries Collection Station Number 23 Location: Mouth of Independence Creek Type of Collection: 3 experimental gill nets Date: March 6, 1958 Species No. % by Longnose gar 46 Gizzard shad yy Blue sucker Smallmouth buffalo Channel catfish Yellow catfish Black bass h6, yh, y) LE 1 1 1 Totals 100. Collection Station Number 28 Location: 1 mile above Highway 90 bridge on Marty King Ranch Type of Collection: 2 experimental gill nets and one 2" net Date: April 9, 1958 Species No % by No. Avg. Wt. % by Wt. Avg. K. Ozs. Alligator gar 2 5.56 160 9.67 -70 Longnose gar 3 8.33 305 27.74 .28 Gizzard shad 1 2.78 oh 0.73 1.88 River carpsucker 1 2.76 11 0.33 2.58 Blue sucker 4 11.11 59 7.16 1.40 Smallmouth buffalo 3 8.33 Lay 8.70 3.08 Yellow catfish 1 2.78 336 10.19 1.90 Rio Grande blue catfish 16 WY yd 60 29.11 1.59 Channel catfish 3 8.33 41 3.73 1.55 Freshwater drum 2 5.56 yy 2.64 2.29 Totals 36 Collection Station Number 29 Location: mouth of Pecos River at Rio Grande on Marty King Ranch Type of Collection: 3 experimental gill nets and one 2" net Date: March 6, 1958 Species No % by No. Avg. Wt. % by Wt. Avg. K. Ozs. Alligator gar 1 1.64 20 7.61 0.80 Longnose gar 4 6.56 28 3.55 0.35 Gizzard shad 1 1.64 2 0.06 2.19 River carpsucker 6 9.83 14 2.67 2.2h Blue sucker 1 1.64 43 1.37 LAL Rio Grande blue catfish 47 77.05 56 84.07 1.57 Freshwater drum 1 1.64 21 0.67 1.98 ON ke ht 2 oO Totals 00 --- Page 20 --- Table VII. Collection Station Number 1 Location: Below Red Bluff Dam Type Equipment Employed: 26 ft. bag seine and 12 ft. common seine Species Gambusia Killifishes Tetra Redhors Parrot Carp Green s e shiners minnow unfish Bluegill White bass Totals Collection Station Number 2 mouth of Screwbean Draw, 3 miles below Red Bluff Dam Location: 18. August 21, 1955 No. 60 300 fe) 20 ~ 2 60 58 11 223 11.48 57.36 0.00 3.82 2.29 0.38 11.48 11.08 2.11 100.00 * * Fish Populations of the Pecos River taken by Seining. April 18, 1956 No. 25 200 8 17 ) 6 52 105 hh 457 FOWrFRWWYH 100. Type of Equipment Employed: 26 ft. bag seine and 12 ft. common seine Species Gambusia Killifishes Redhorse shiners Spottail shiners Parrot minnows Carp Smallmouth buffalo Shad White bass Totals No. 200 180 7 12 18 8 2 1 dd. 319 August 21, 1955 48 .76 -75 TL .00 231 38 22. 98 00 --- Page 21 --- 19. Table VII. Fish Populations of the Pecos River Taken by Seining. (Continued ) Collection Station Number 3. Location: Pasotex Pipe Line crossing river 6 miles southeast of Orla Type of Equipment Employed: 26 ft. bag seine and 12 ft. common seine Species August 22, 1955 April 19, 1956 No. % No. vA Gambusia 18 22.78 26 23,01 Fundulus 32 40.50 ho 35.71 Shad 8 10.13 6 5.36 Carp 2 2.54 6 5.36 White bass 2 2.54 9 8.04 Bluegill 11 13.92 16 14.28 Green sunfish 6 7.59 9 8.04 Totals 79 100.00 112 100.00 x %& * Collection Station Number }. Location: Mentone Crossing Bridge on Ranch Road 302 Type of Equipment Employed: 26 ft. bag seine and 12 ft. common seine Species August 22, 1955 April 19, 1956 No. % No. Gambusia 80 41.24 68 33.17 Fundulus 46 23.71 37 18.04 Parrot minnows fe) 0.00 8 3.92 Redhorse shiners ) 0.00 2h 11.70 Tetra 2 1.03 fe) 4.39 Shad 12 6.19 1 0.48 White bass 6 3.09 8 3.92 Channel cat © 0.00 3 1.46 Green sunfish eh 12.37 17 8.29 Bluegill 18 9.28 30 14.63 Western longear 6 3.09 ) 0.00 Totals 194 100.00 205 100.00 --- Page 22 --- 20. Table VII. Fish Populations of the Pecos River Taken by Seining. (Continued ) Collection Station Number 5. Location: Ward County Water District No. 3, Diversion Dam Type of Equipment Employed: 26 ft. bag seine and 12 ft. common seine Species August 22, 1955 April 19, 1956 No. % No. Gambusia 200 55.41 64 33.68 Killifishes 75 20.78 60 31.58 Spottail shiners 28 7-75 4 2.11 Redhorse shiners 16 443 22 11.58 Shad ‘11 3.04 2 1.05 Carp 2 0.56 6 3.16 River carpsuckers 2 0.56 0 0.00 Green sunfish 18 4.98 2 1.05 Bluegill sunfish 9 2.49 14 7.37 White bass ©) 0.00 16 8.42 Totals 361 100.00 190 100.00 * * * Collection Station Number 6. Location: Ward County Irrigation District No. l Type of Equipment Employed: 26 ft. bag seine and 12 ft. common seine Species August 22, 1955 April 19, 1956 No. % No. Gambusia 124 47.88 80 47.62 Killifishes 82 31.66 40 23.81 Plains shiners 21 8.10 6 3.57 Shad 8 3.09 2 1.19 Carp il 4.25 6 3.57 Drum O 0.00 h 2.38 Longnose gar 2 O.77 1 0.60 White bass 11 4.25 29 17.26 Totals 259 100.00 168 100.00 --- Page 23 --- el. Table VII. Fish Fopulations of the Pecos River Taken by Seining. (Continued ) Collection Station Number 7. Location: Highway bridge 2 miles east of Pecos Type of Equipment Employed: 26 ft. bag seine and 12 ft. common seine Species May 24, 1956 January 8, 1957 No. % No. Gambusia 68 36.56 7h 37. Killifishes 32 17.20 48 ak. Tetra 6 3.22 3 1. Redhorse shiners 26 13.98 4 2 Plains shiners 2 1.08 0 OQ. Carp 1 5.91 4 2 River carpsuckers 2 1.08 2 1 Drum 2 1.08 L 16) Sunfish 28 415.05 37 18 White bass 9 484 22 11 Totals 186 100.00 195 100. x * * Collection Station Number 8. Location: Big Valley Ward County District Number 2, Diversion Dam Type of Equipment Employed: 26 ft. bag seine and 12 ft. common seine. Species May 31, 1955 May 24, 1956 No. % No. Gambusia 72 48.64 30 19. Killifishes 38 25.67 61 ho. Redhorse shiner 12 8.11 18 ll. Shad 8 5.42 9 5. Bluegill 8 5.42 14 9. Green sunfish 5 3.37 11 7. White bass 5 3.37 9 5. Totals 148 100.00 152 100. 94 61 53 .06 O00 .06 .03 .52 -9T .28 00 73 13 84 ce al 23 93 00 --- Page 24 --- 22. Table VII. Fish Populations of the Pecos River Taken by Seining. (Continued ) Collection Station Number 9. Location: Stream crossing 13 miles south of Ward Diversion Dam Number 2 Type of Equipment Employed: 26 ft. bag seine and 12 ft. common seine Species May 31, 1955 No. Redhorse shiner 60 68.97 Green sunfish 17 19.54 Bluegill 5 9-75 Western longear 3 3.45 White bass 2 2.29 Totals 87 100.00 x * % Collection Station Number 10 Location: Pecos County Water District Number 2, 600 ft. below Diversion Dam, 18 stream miles northwest of Grandfalls Crossing Type of Equipment Employed: 26 ft. bag seine and 12 ft. common seine Species May 24, 1956 January 8, 1957 No. % No. Gambusia 29 14.65 16 10.67 Fundulus 60 30.30 80 53.33 Redhorse shiner 38 19.19 8 5.33 Parrot minnows \ 2.02 ) 0.00 River carpsuckers 4 2.02 2 1.34 Carp 2 1.01 1 0.66 Shad 18 9.09 6 4.00 Longnose gar 2 1.01 2 1.34 Spotted gar 2 1.01 0 0.00 Largemouth bass 1 0.51 0 0.00 White crappie 7 3.54 11 7.33 Bluegill 12 6.06 2 1.34 Green sunfish 9 454 8 5.33 Western longear iF 2.02 ) 0.00 White bass 6 3.03 14 9.33 Totals 198 100.00 150 100.00 --- Page 25 --- 23. Table VII. Fish Populations of the Pecos River Taken by Seining. (Continued ) Collection Station Number ll. Location: Ward County Water District Number 2, 4 Line mile above Reeves-Pecos County Type of Equipment Employed: 26 ft. bag seine and 12 ft. common seine Species May 24, 1956 No. I Gambusia 58 43.28 Killifishes 22 16.42 Redhorse shiners 12 8.95 Shad 8 5.98 Drum 0 0.00 Bluegill 21 15.68 Green sunfish 11 8.20 White bass 2 1.49 Totals 134 100.00 x ** Collection Station Number 12. January 8, 1957 No. kg 30.44 37 22.98 0 0.00 2 1.24 a 1.24 19 11.80 36 22.36 16 9.94 161 100.00 Location: Pecos County Water District Number 2, Diversion Dam Number 2 at Royalty Crossing Type of Equipment Employed: 12 ft. common seine Species February 26, 1957 No. Gambusia 144 35.82 Killifishes 108 26.86 Redhorse shiners 8h 20.89 Plains shiners 20 4.97 Carp 1 0.24 Redhorse suckers 4 0.99 River carpsuckers 1 0.24 Drum 0 0.00 Bluegill 38 9.51 White bass 2 0.48 Totals hoe 100.00 November 19, 1957 No. 62 33.51 52 28.11 29 15.68 0.00 0.54 0.00 1.63 0.54 8.64 11.35 185 100.00 FONRWOFO Nk --- Page 26 --- as. Table VII. Fish Populations of the Pecos River Taken by Seining. (Continued ) Collection Station Number 13. Location: Grandfalls Crossing Type of Equipment Employed: 12 ft. common seine Species February 26, 1957 No. % Gambusia 112 61.55 Killifishes 22 12.09 Redhorse shiners 10 5.49 Parrot minnows 16 8.79 Redhorse suckers 6) 0.00 Yellow bullheads 0) 0.00 Bluegill 20 10.99 White bass 2 1.09 Totals 182 100.00 x *% *% Collection Station Number 14. Location: Pecos County Water District Number 3, Reservoir Type of Equipment Employed: 12 ft. common seine Species February 25, 1957 No. Shad 14 29.16 Carp 12 25.00 White bass 22 45.84 Totals 48 100.00 November 19, 1957 No. 139 55.16 30 11.90 2h 9.52 0 0.00 4 1.58 13 5.16 14 5.56 28 11.12 252 100.00 Diversion Dam at Zimmerman November 18, 1957 No. 11 45.83 4 16.66 9 37-51 ak 100.00 --- Page 27 --- Table VII. 2 (Conti Collection Station Number 15. Location: 4 miles above highway bridge on Ranch Road 1053 Type of Equipment Employed: 26 ft. bag seine and 12 ft. common seine Species Gambusia Killifishes Redhorse shiners Spottail shiners Plains shiners Tetra Cichlids Shad Drum Carp Longnose gar Bluegill Green sunfish White crappie White bass Channel catfish Totals May 24, 1956 No. 63 18.36 112 32.65. 38 11.07 2 0.59 6 1.74 14 4.08 2 0.59 13 3.79 2 0.59 12 3.49 @) 0.00 28 8.17 Xe) 11.67 0 0.00 11 3.21 0 9.00 343 100.00 * % ¥ Collection Station Number 16. Location: Buena Vista-Crane Farm Road Crossing Type of Equipment Employed: Species Gambusia Killifishes Spottail shiners Parrot minnows Shad Bluegill Green sunfish White crappie White bass Totals 26 ft. bag seine and 12 ft. common seine February 27, No. 136 38 oh 16 28 19 21 2 6 290 1 5. nued ) 1957 i 46.89 13.10 8.29 5.52 9.66 6.55 7.2k 0.68 2.07 00.00 Fish Populations of the Pecos River Taken by Seining. November 18, 1957 No. 48 ho ne) Pe oP FENEPOAN OFOMAFFOO 177 November 25, No. 47 30 2 14 3 16 2 2 2 125 211 259 .00 .00 .27 .89 38 .00 .56 .16 .12 .03 223 .12 .27 27 100.00 tw oN MMrFONWOFODOOWFNOO 1957 i 37.60 24.00 1.60 11.20 2.40 12.80 7.20 1.60 1.60 100.00 --- Page 28 --- Table VII. 26. Fish Populations of the Pecos River Taken by Seining. Collection Station Number 17. Location: Type of Equipment Employed: Species Killifishes Tetra Shad Totals No. 30 2 8 LO Collection Station Number 18. Location: Type of Equipment Employed: Species Gambusia Killifishes Redhorse shiners Plains shiners Parrot minnows Shad Carp River carpsuckers Green sunfish White crappie White bass Totals Highway 305 crossing on 26 ft. bag seine and 12 ft. (Continued ) Highway bridge 2 miles east of Girvin 12 ft. common seine November 19, mae 75.00 5.00 20.00 100.00 Iraan-McCamey Road May 30, 1955 No. 48 33.10 16 11.03 21 14.49 16 11.05 14 9.65 3 2.06 9 6.23 rH 2.75 11 7.58 1 0.69 2 1.37 145 100.00 common seine April 5, 1957 129 1 22.48 29.46 Ow AW OC FOO [e) (o) --- Page 29 --- 27. Table VII. Fish Populations of the Pecos River Taken by Seining. Collection Station Number 19. Location: Highway 51 crossing on Rankin-McCamey Road (Continue a) Type of Equipment Employed: 26 ft. bag seine and 12 ft. common seine Species May 30, 1955 No. Gambusia 200 72.46 Killifishes 46 16.66 Redhorse shiners 8 2.89 Parrot minnows 2 0.72 Plains minnows 6) 0.00 Shad O 0.00 Drum 2 0.72 Green sunfish 16 5.83 Largemouth bass 2 0.72 White bass 6) 0.00 Totals 276 100.00 * * ¥ Collection Station Number 20. Location: Brooks Ranch 4 miles Highway Type of Equipment Employed: 26 Species No. Gambusia 120 Killifishes 64 Shad 10 Longnose gar 28 Spotted gar 6 Bluegill sunfish 2h Green sunfish 18 Western longear 8 Largemouth bass 2 White crappie 2 White bass 8 Channel catfish 6) Totals 290 April 5, 1957 No. 150 63 hO 16 ) fe) 6 h 4 1. 6 2. 21 8. 2 oO. h 1. 237 100 north of bridge on Highway 290, Ozona-Sheffield ft. bag seine and 12 ft. common seine "p I oe i) ONOONAANMOW Pl LOO. 7 f .06 Ay 72 .06 :27 .20 “15 .69 .69 “75 .00 00 No. % 76 36. 80 37. ho 1. 3 1. 0 0. 16 7. 14 6. 2 oO. 1 0. 7 3. 6 2. 2 oO. 211 100. --- Page 30 --- 28. Table VII. Fish Populations of the Pecos River Taken by Seining. (Continued ) Collection Station Number el. Location: Highway 290, Ozona-Sheffield Highway Type of Equipment Employed: 26 ft. bag seine and 12 ft. common seine Species No. % No. % Gambusia 120 46.33 64 43.84 Killifishes 80 30.88 16 10.95 Redhorse shiners 18 6.94 11 7.63 Parrot minnows 6 32 8 5.48 Shad 9 3.48 2 1.36 Longnose gar 2 0.78 ) 0.00 Carp 1. 0.39 6 4.12 Redhorse suckers 3 1.16 ) 0.00 Sunfish 16 6.18 21 14.38 White bass 4 1.54 18 12.24 Totals 259 100.00 146 100.00 * % Collection Station Number 22. Location: Hugh Childress Ranch 14 miles south of Sheffield Type of Equipment Employed: le ft. common seine Species No. % Gambusia 124 TT Killifishes 60 21.66 Redhorse shiners 18 6.49 Dionda 28 10.10 Carp 4 1.44 Redhorse suckers 6 2.16 River carpsuckers 4 1.44 Shad 13 4.69 Longnose gar 2 0.73 Largemouth bass 2 0.73 Sunfish 16 5.79 Totals 277 100.00 --- Page 31 --- Table VII. Fish Populations of the Pecos River Taken by Seining. (Continued) Collection Station Number 23. Location: Independence Creek bridge Highway 349 Type of Equipment Used: 26 ft. bag seine and 12 Species No. % Gambusia 24 5.38 Killifishes 60 13.45 Redhorse shiners 4 0.89 Dionda 300 67.33 Stone rollers 3 0.67 Tetra 6 1.34 Cichlids 8 1.79 Green sunfish 27 6.05 Bluegill 3 0.67 Redear sunfish 2 O.44 Western longear sunfish 2 0.44 Yellowbelly sunfish 1 0.22 Largemouth bass h 0.89 White crappie 2 0.44 Totals LWhG 100.00 Collection Station Number 23a. Location: Mouth of Independence Creek Type of Equipment Employed: 26 ft. bag seine Species No. % Dionda 200 90.49 Green sunfish 16 7.23 Largemouth bass 5 2.28 Totals eel 100.00 ft. common seine No. 18 21 6 250 2 18 9 35 16 oO OW OO 390 No. 160 38 11 209 ron OFPFONO FON FOFEWU Loe) ie 100.00 76.55 18.18 227 100.00 --- Page 32 --- Table VII. 30. Fish Populations of the Pecos River Taken by Seining. (Continued ) Collection Station Number 24. Location: Pandale Crossing Type of Equipment Employed: Species Dionda Plains shiners Parrot minnows Tetra Cichlids Green sunfishes Bluegill Western longear Largemouth bass Totals No. % 200 69.45 30 10.42 12 417 16 cErp, 2 0.69 12 17 12 4.17 2 0.69 2 0.69 288 100.00 * * * Collection Station Number 25. Location: Mouth of Howards Draw on Al Mills Ranch 8 miles south of Pandale Type Equipment Employed: Species Gambusia Killifishes Plains shiners Dionda Shad Green sunfish Bluegill Western longear Largemouth bass Channel catfish Yellow bullheads Totals April 17, 1957 No. 111 29.67 39 10.42 8 2.13 140 37.43 3 0.80 16 4.26 36 9.62 2 0.60 6 1.60 0 0.00 13 3.47 374 100.00 26 ft. bag seine and 12 ft. common seine No. % 130 70. 14. -55 635 .26 .80 .17 .00 55 184 100. nD HOFFA OAOrR-A OCONWW FO 26 ft. bag seine and 12 ft. common seine March 6, 1958 No. 80 19. 62 14. 16 3. 201 48. 2 ) 28 6 6 1 0 0 2 re) 12 2 7 2 416 100. 65 67 00 23 91 84 31 49 “73 an -00 249 68 .68 GO --- Page 33 --- Table VII. Se Collection Station Number 26, Location: Bud Mills Ranch 4 miles west of Pandale Type of Equipment Employed: Species Gambusia Killifishes Campostoma Dionda Green sunfish Western longear Redear sunfish Tetra Chiclids Totals March 6, 1958 No. 16 5.89 22 8.08 14 5.14 160 58.84 28 10.29 12 WAL 12 kT 6 2.21 2 0.73 272 100.00 Collection Station Number 27. Location: Marty King Ranch 4 miles east of Comstock-Langtry Bridge Type of Equipment Employed: Species Gambusia Dionda Campostoma Tetra Chiclids Green sunfish Totals March 6, 1958 No. % 21 10.71 125 63.77 12 6.12 23 11.73 y 2.0k 1l 5.63 196 100.00 Collection Station Number 28. Location: Marty King Ranch at Comstock=-Langtry Bridge Type of Equipment Employed: Species Gamb…