Fisheries Survey Results, Geronimo Creek, Guadalupe County, Texas, March 9-10, 1989

--- Page 1 --- PR. == wer Pay + EL ca fo BM R. Tellin hin He poe, Sietr = OFFICE MEMORANDUM | COORDINATION - ROUTING | TO: Phil Durocher (through Roger McCabe) FROM: Mike Ryan SUBJECT: Fisheries survey results RE: Geronimo Creek, Guadalupe Co. DATE: March 10, 1989 As per your instructions, I conducted a fisheries survey at Geronimo Creek on March 9-10 to determine if tilapia were present. Two sites in the lower section of the creek (Fig. 1) were sampled with electrofishing gear and frame nets. No tilapia were observed or collected during this survey (Tables 1 and 2). In addition, our Resource Protection Division is presently monitoring the fish community in this creek under a cooperative river studies program with the Texas Water Commission. Under the river studies program, Geronimo Creek has been selected as an "unimpacted" reference site. Resource Protection personnel conducted an electrofishing survey at an upstream site (Fig. 2) during the summer of 1988. No tilapia were observed or collected (Roy Kleinsasser pers. comm.). They are scheduled to conduct additional sampling on Geronimo Creek later this month. As I mentioned in February, tilapia are present in the Guadalupe drainage. They were collected in 1988 fish community sampling conducted at Canyon, Dunlap, McQueeney, and Placid Reservoirs. These reservoirs are located upstream from the confluence of Geronimo Creek and the Guadalupe River. However, relative abundance of tilapia is low in these reservoirs. Tilapia have not been reported in H-4 or H-5, two reservoirs below the confluence of Geronimo Creek and the Guadalupe River (Jimmy Dean pers. comm.) --- Page 2 --- Based on our results and other available data, the presence of tilapia in Geronimo Creek has not been documented. If you need additional information on this please advise. Best Wishes, Yjph Mike Ryan --- Page 3 --- Table 1. Electrofishing sampling statistics at two stations (0.42 hr/sta), Geronimo Creek, Guadalupe County, Texas, March 9, 1989. Total Number Collected Species Station 1 Station 2 Gar sp. * Gizzard shad a s Bullhead minnow 10 = Texas shiner 46 4 Red shiner 10 2 Weed shiner i - Blacktail shiner 18 = Notropus sp. 28 = River carpsucker - 1 Gray redhorse 8 15 Blackstripe topminnow 3 1 Inland silverside 3 = Redbreast sunfish 3 - Green sunfish 8 = Warmouth 2 1 Bluegill 27 9 Longear sunfish 23 14 Redear sunfish i = Largemouth bass 6 ; 1 Guadalupe bass 9 4 Logperch * * Observed --- Page 4 --- Table 2. Frame net sampling statistics from Geronimo Creek at two stations (one net-night/sta), Guadalupe County,., Texas, March 9-10, 1989. Total Number Collected Species Station 1 Station 2 Gray redhorse 2 1 Channel catfish al Green sunfish 1 Bluegill 7 Longear sunfish 1 --- Page 5 --- i 7 —=HUP vs kT (3) @ AUTO jUNRVARD > TATE eogeonae 13] GARBALE AND RUBErSH DUMP grate wer ons SCRAP METAL —<z —— Tl FEED ior STATE vogermay nen toad n SEWAGE TREATMENT PLANT [leap rms on ance 10 uaa oO TRAILER PARE fs RECREATIONAY, FACILITY RECRIATIONA: @ouD (© — GOLF COURSE OF COUNTRY CLUB a sR. GROUND OF RODED ARENA a3 ATLL US hapenar & | ; GENERAL HIGHY | SUPPLEMENTARY § DETAIL OF CITIES GUADALUPE COU | | | | . : . | | STATE DEPARTMENT | | _t | | | | | yy ts, PREPARED BY TH {477 . AND PUBLIC TRANS at : TRANSPORTATION PLANNI . IN COOPERATION WIT! 7 U.S. DEPARTMENT OF TR bmile FEDERAL HIGHWAY ADMIr Fivuare /. SCALE IN MILES