CAEP CULTUEE 73 



probably any reasonable amount would yield 

 fully as much, acre for acre, as land devoted to 

 vegetable produce. This is important, since a 

 carp-farm can be established on land which or- 

 dinarily yields little or nothing. 



Ponds. Hatching-houses and expensive ap- 

 paratus are unnecessary. The entire business 

 may be conducted by pond-culture. Mr. Leon 

 J. Cole, who prepared a bulletin for the United 

 States Bureau of Fisheries in 1905, entitled 

 " German Carp in the United States," says: 



"A well appointed carp-cultural establishment has 

 at least three kinds of ponds, each adapted for a par- 

 ticular phase of industry. 



"1. Spawning ponds. Shallow ponds in which the 

 water is easily warmed by the sun and suitable for 

 the spawning fish. 



"2. Raising ponds. Ponds usually of medium size, 

 to which the fry are transferred and where they are 

 retained, isolated from the larger fish, until they are 

 a year or two old. 



"3. Stock ponds. Large ponds in which the fish 

 are kept until they have reached a marketable size; 

 this is usually considered to be when they have reached 

 a weight of two and three-quarters pounds to two and 

 a half pounds." 



