Lydell. — Progress in Practical Fish Culture 227 



bluegills placed in a pond, provided there is food enough 

 to get them started, as they can be readily fed upon pre- 

 pared food. We have been successful in feeding fresh 

 liver or clam meal, very finely ground. In one pond, 

 three hundred feet long and two hundred feet w^ide, we 

 have about sixty thousand fingerling fish. You will find 

 that this experiment merits your consideration and trial, 

 provided you are in a locality where bluegill fry can be 

 obtained from outlying waters. 



COLLECTING AND HATCHING PERCH 



The best results so far in rearing perch have been ob- 

 tained by preparing the ponds as above described, turn- 

 ing on the water about the second week in April, in our 

 locality, and then introducing several pairs of goldfish, 

 according to the area of the pond. The young perch fry 

 are introduced immediately after hatching. Nothing fur- 

 ther is done until the perch show up around the shores, 

 at which time they are about three-quarters of an inch in 

 length. Then feeding is begun and continued until the 

 latter part of August, when the fish are about three 

 inches long. Several perch upon being examined have 

 been found to contain small goldfish. The pond devoted 

 to this work in 1920 yielded about 18,000 three-inch perch 

 and several thousand young goldfish, the latter being re- 

 moved during seining operations for perch. After ex- 

 hausting or taking what they wanted of the natural food 

 supply, the perch began to feed upon the young goldfish, 

 and in addition took prepared food introduced three times 

 a day. 



In former years it was Customary to collect the adult 

 perch for breeding purposes, and results were considered 

 very successful. But it was found by holding them over 

 and feeding until the next season, we did not get as many 

 eggs or as high a percentage of good eggs as we got from 



