Carrol Daily Times Herald from Carroll, Iowa on April 29, 1976 · Page 9
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Carrol Daily Times Herald from Carroll, Iowa · Page 9

Carroll, Iowa
Issue Date:
Thursday, April 29, 1976
Page 9
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Rathbun Hatchery Aims to Provide More Fish for Iowa's Waters By Lori Rotenberk (Drake University Journalism Student) CENTERVILLE - The low a Conservation Commission's Rathbun hatchery here in Appanoose County may well be the answer to many an Iowa fisherman's dreams. The unique, intensive-culture, warm-water hatchery is scheduled to begin full operation next spring and will be used to stock Iowa's recreational waters statewide. The emphasis is on production of more catfish, striped bass, walleye pike and muskie, said Andy Moore, fish biologist for the Rathbun facility. The project was approved in Octover 1972, and construction began in 1974. The commission signed a long-term lease for the land with the Army Corps of Engineer^. The corps has provided nearly $750,000 for the project and the Iowa Legislature approved appropriations of nearly $1 million. "A large amount of the money has also come from the sale of fishing and hunting licenses," said Moore. He said the commission is seeking to increase each license by a dollar to help support the hatchery. The increase in fishermen will also bring more money in the trust fund . in one way, Rathbun will pay for itself," said Jerry M. Conley, Superintendent of Fisheries for the Conservation Commission in Des Moines. License sales have increased 5-6 per cent over the past couple years and the .state's population has stayed the same, so that must mean Iowa is becoming a popular place for fishermen, said Conley. . Rathbun will substantially improve fishing in the state, Conley said, while adding that the fish .supply in Wisconsin and Minnesota is going down as more people fish there. Iowa is getting more water areas, which will create better fishing, he said. "With the establishment of new water areas as Saylorville Dam, Rathbun Lake, Coralville (Reservoir) and private ponds, -the water acreage has increased by 30,000," said Conley. "We need Rathbun Hatchery to stock these areas, and with the way it is planned, we should be able to stock effectively into tlie year 2000." •', The Rathbun location was chosen because of the water quality, quantity, available land arfd warmer water temperatures,, Iowa will be the.first state with such a warm-water facility. Warm-water culture is the latest trend in rearing fish, said Moore. "All other hatcheries are extensive, meaning they do not use the intensive water flow. Intensive culture is more economical. It cuts production costs and allows us to stock the fish in the same year they spawn," said Conley. The hatchery will function on water from the lake. A pipe system installed 17 feet below tfie surface draws in water to supply 20 circulating rearing ponds where the fish are deposited. "These circulating ponds . have a contant water flow. This is why they are tagged intensive culture. We have eight presently functioning in • which fi^h will be reared," said Moore. Inside the hatchery will be 40 tanks to hold the brood fish. . "Here," said Moore, "we .will ..plan to shorten the stocking time for the catfish. This is the main function of the hatchery. We want to shorten • spawning time from one season to six months. I guess you'd say we fool the fish by creating a summer like atmosphere, causing them to spawn earlier." "The catfish usually spawn around June or July — depending on the weather. We should be able to have this occur earlier by keeping the water temperature at 75 degrees with a heating system, and use of an ultraviolet light to create longer hours of daylight," said Moore. "Our catfish supply was lessening because bluegills and other small pond fish were eating the young channel cat, (when they were stocked in Iowa waters). Now since the hatchery will grow the catfish to a bigger size before stocking, there is no chance that a small fish will feed on them ... so this will eventually give us an increase in the number of cat in the lakes," said Conley. Once the fish spawn, the eggs will be placed in jars which also have an intensive water flow, until they hatch. "After they hatch, they will be kept in tanks in the hatchery until they are about three inches long . . . after this we place them in the ponds outside which also have a feeding system, and hope to raise them to about 10 inches by October," said Moore. Although the hatchery operation is not yet in full swing, it has already produced 41,000 catfish and the biologists are hoping for 130,000 this spring. "We already have 230,000 young-of-the-year (fish hatched last year)," said Moore, "but they won't be ready for supply." The fish are fed a high-protein artificial dry T!me> Herald, Carroll, la. Q Thunday, April 29, 1976 ' pellet diet according to their weight. The catfish will consume 3 to 5 per cent of total body weight per day. The striped bass, which are on a special diet of Oregon moist pellets, should consume 6 per cent of their daily weight. "The cost of feeding the fish is not too expensive. The pellets run from 14 to 25 cents a pound. We estimate that we'll use 40,000 pounds total this year as projected needs. It will take, foi example, 1.7 pounds of feed to produce one pound of catfish . . . anything under two is good," said Moore. Once the fish reach their expected size, they are graded by an automatic system. Each fish is put through a course of bars. The fish that are too large to get through these are shipped for stocking. Hatcheries at Humboldt and Wapello have closed down since the establishment of Rathbun. "It will benefit the remaining stations because they will be able to concentrate on breeding one specific type of fish, which will keep the supply of that species at a high level," said Moore. The Rathbun hatchery also will have a disease control center headed by biologist Vern Spykerman. The facility also will have a pollution control system to keep the hatchery water disease free. A visitors center is presently under construction. People will be free to view the hatchery procedures, see aquariums with warm water species and view a display of projects and environmental concerns of the Conservation Commission. 1 ' Rathbun is the finest warm water hatchery in the nation. It incorporates all the ideas in one . . . people are coming in from all over the nation to see it,"said Conley. "California and New York are considering building one in due lime." said Conley. "We have the hatchery of the future right here in Iowa." STORE HOURS: MOM. Thru THURS 9 to 5 FRIDAY 9 to 9 SATURDAY 9 to 5 GOING OUT Of BUSINESS SALE I!! EVERYTHING GOES A T LOW LOW PRICESI.'.' 3 STYLES OF DINGO BOOTS LT. BROWN • TAN DARK BROWN ENTIRE STOCK REDUCED SIZES 8 Thru 12 D WIDTH ONE TABLE MEN'S SHOES $ 17 VALUES TO $ 30°° ONE TABLE WOS. SHOES • VARIETY OF STYLES • ASSORTED COLORS • SIZES SV2 THRU 10 VALUES TO $2] oo ONE GROUP ADIDAS ' Wrestling Shoes 1 Track Shoes 1 Coaches Shoes Broken Siies FINE QUALITY MEN'S SHOES • LACE OXFORDS • SLIP-ONS • SOLID COLORS - TWO TONES ENTIRE STOCK REDUCED • SIZES 7'/2 Thru 12 C and D WIDTHS ONE TABU WOMEN'S SHOES $ 7 VALUES T0 $ 24 VFF'S SHOE STORE WESTGATE MAUI PHONE 792-9675 ENTIRE STOCK CONNIE BRAND 4-HNewsl I/VAC CffATC MAPLE RIVER - The • WW^J&+ WVf ^BTlElW ;„!__ -l-.~~ «f tUrt IV/lnnln ^H ^^^ ^^^ ^^ ^^^ ^^ ^^ ^^^ ^^™ ^^^ MAPLE RIVER - The regular meeting of the Maple River Top Notchers was April 21 at 7:30 p.m. The pledge of allegiance and the 4-H pledge was led by Ann Schrad. Roll call was "Show a Picture of a Fun Furnishing They Would Like to Make." Candles and patchwork were some of the things mentioned. The Mothers' Tea was set for. May 5 at 7:30 p.m. The 'girls are reminded of the health clinic. ','Guides for Cleaning B, a t h r o o m s ' ' was demonstrated by Joni Loew. Hostesses were Joyce Sanders and her mother. DRASTICALLY REDUCED! 11 OFF REGULAR PRICE MO REFUNDS ALL SALES FINAL 8 PAIRS-MEN'S GOLF SHOES WERE $ 33 NOW $ Thru 10V2 D 10!/2B-11B TERRIFIC VALUE! WOMEN'S GLOV-CTT'S • WHITE • TAN • BLACK • RED SIZES 5 THRU 10-AA-A-B-C WIDTHS

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