1,142 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [10] 



food for the fry do not reach too large a size. It is of the greatest im- 

 portance for the raising of all Iftnds of fish that we should be furnished 

 the means of producing the natural food of the young fish in large 

 quantities. 



Frogs are hurtful in spawning-ponds, because they devour too many 

 small fish. For larger carp, however, frogs form a very valuable article 

 of food. For this purpose Dubisch gathers the spawn of frogs from the 

 spawning-ponds and transfers it to the raising-ponds and growing- 

 ponds. The larvae of the frogs seem to be a favorite food of the carp, 

 and to further its growth very much. 



