tions which employ professional staffs of engineers, 

 biologists, and business managers. These enter- 

 prises are beginning to use intensive culture methods 

 to rear cattish. Production levels of 9 kg/m^ are being 

 realized in circular tanks. 



Raceway culture at the Fish Farming Experimen- 

 tal Station which the Bureau of Sport Fisheries and 

 Wildlife operates at Stuttgart, Ark., is producing 

 about 900 kg of catfish per year in 115 m^ of space 

 with a total flow of 35 liters/sec. Water temperature 

 is 28°C. This is far below the potential for this 

 species in light of experimental data which reveal 

 that 9 kg/m^ are routinely held in circular tanks 

 with a diameter of 2 m and with a water flow of 

 0.3 liters/sec. 



Striped Bass, Morone saxalilis 



Striped bass culture, like channel catfish, is show- 

 ing great promise, although the production of this 

 species is still in the development stage. The geo- 

 graphical range of striped bass extends from the St. 

 Lawrence River. Canada, to the large rivers of 

 South Carolina and Georgia along the Atlantic coast 

 and along the Gulf coast from western Florida to 

 Louisiana (Pearson, 1938). 



Recent investigations indicate that the only sub- 

 stantial fishery for this species in Florida is in the 

 Apalachicola River, which empties into the Gulf of 

 Mexico. 



On the F'acit'ic coast striped bass ranges from 

 southern California to the Columbia River. Oreg. 

 Introduction of this species to the Pacific coast was 

 accomplished with an initial stocking of 133 yearling 

 fish in San Francisco Bay in 1879 (Mason, 1882). 

 These fish were seined from the Navesink River, 

 N.J.. and transported to California by train. 



By 1899 the commercial catch of striped bass was 

 599 metric tons and by 1915 it had risen to 808 metric 

 tons (Raney et al.. 1952). 



The establishment of landlocked striped bass 

 populations in several inland reservoirs has gener- 

 ated considerable enthusiasm in regard to the future 

 potential of this species. Using striped bass on a put. 

 grow, and take basis could prove to be a desirable 

 management technique fi>r large freshwater im- 

 poundments. In addition to its acceptance as a 

 superb game and table fish, the striped bass also 

 exhibits the ability to function as a biological control 

 for gizzard shad. Doii>Si>i)i(i icpcilhiniim. 



The ability to produce millions of striped bass fry 

 through hormone induced spaw ning is nov\ a reality 



(Stevens. 1966). This accomplishment has resulted 

 in major attempts to establish striped bass popula- 

 tions with large-scale fry plantings. A final evalua- 

 tion of the success of these programs is not available 

 at this lime; however, it is the general consensus that 

 predation will prevent the establishment of desirable 

 populations with this type of introduction. The al- 

 ternative is to introduce fingerlings (6-15 cm) instead 

 of fry. At least six states in the southern United 

 States have embarked on fingerling rearing pro- 

 grams. 



Production at federal hatcheries increased from 

 90,000 fingerlings in 1966 to 1.500,000 in 1970. 



Intensive Fish Culture 



Some of the more common species offish reared 

 by intensive culture method are; rainbow trout, 

 Salmo gairdneri; brook trout, Sahelinus fontinoUs; 

 brown trout, Salmo trutla: lake trout, Sahelinus 

 nuinayctisli: golden trout. Salmo agiiahonira: 

 cutthroat trout. S. clarki: coho salmon, 

 Oncorhynchits kisiiicli: chum salmon. O. keta; 

 Chinook salmon. O. tshawytscha: kokanee or sock- 

 eye salmon. O. nerka: and Atlantic salmon, Salmo 

 salar. 



One of the basic advances in trout and salmon 

 rearing is in the area of nutrition. Fish diets are now 

 compounded as carefully and scientifically as diets 

 for domestic animals. The basic nutritional needs of 

 most species of trout and salmon have been defined 

 by such workers as Phillips (1970) and Halver 

 (1970). and diets are formulated to meet these 

 needs. Proximate analysis of typical trout and salm- 

 on diets are as follows: 



' NFE = nitrogen free extract. 



Mechanical fish feeders are coming into wide- 

 spread use and arc taking o\er the role o\' feeding 



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