Fish and Fishermen 245 



just as rapidly as sources of water can be obtained suitable 

 for producing catchable fish — retaining enough of the old 

 hatcheries to meet fingerling needs. 



4. Effective disease-control measures, low-cost foods, and 

 means of reducing expenditures on apparatus and installa- 

 tions must be constantly sought in order to raise more catch- 

 able fish with the money available. 



5. Unceasing vigilance and constant effort are needed in 

 order to use every reasonable means to preserve trout waters 

 against the demands of dam-builders, lumbermen, road- 

 builders, farmers, and miners j otherwise we shall find our- 

 selves with hatcheries full of trout and no water to put them 

 in. 



6. Wild trout must receive all possible protection through 

 improvement of their habitat and through wise conservation 

 regulations. It still remains true that they can produce more, 

 better, and cheaper little trout than man is able to do. 



Trout are among the easiest fish to breed and distribute 

 artificially. By this I do not mean that skill, care, intelli- 

 gence, training, and experience are not necessary for success- 

 ful results. I mean that we have learned to handle them in 

 great numbers more easily than any other game fish. With 

 the "warm-water" species such as the black basses and their 

 relatives the sunfishes and the crappies, the picture is quite 

 different. The eggs cannot be successfully removed from the 

 females and hatched. The young are not receptive to pre- 

 pared foods. The accepted method for "artificial" produc- 

 tion of black bass is: Let the adults spawn naturally in suit- 

 able ponds J remove the young to other ponds to prevent 

 their ingestion by their parents after the guarding stage has 

 passed J see to it that these rearing ponds are well supplied 

 with insect larvae, daphnia, and the like as food for the bass 

 in their very early stages, and with small fish as forage for 

 them when they grow larger. Under these conditions, it can 



