230 American Fisheries Society 



Mr. Adams : So far as the principle is concerned the two would 

 be similar? 



Mr. Lydell: Yes. I would clean them out of any pond in which 

 I wanted to rear young bass. 



Mr. Titcomb: Do you ever use the tadpole for feeding bass? 

 . Mr. Lydell: Often in the fall; we are feeding some now, collected 

 from outside waters. 



Dr. R. C. Osburn, Columbus, Ohio : The principle, of course, is 

 that the tadpole is a vegetable feeder and will clean up the algae upon 

 which these small Crustacea and insect larvae feed; therefore you will 

 reduce the natural food of the bass by having the tadpoles in the pond 

 at a time when the bass are too small to feed on the tadpoles. On the 

 other hand, at a later stage the tadpoles will be gone before the bass 

 are big enough to handle them. If, therefore, you want to grow tad- 

 poles for bass culture, the thing to do is to have an entirely separate 

 pond for them and put them into your bass pond at the proper time. 



Mr. Lydell: We have one pond more exclusively for bullheads, 

 and into that pond we put all the large tadpoles. When we began to 

 feed our young bullheads the clam meal, I noticed that it took more to 

 feed the tadpoles than the bullheads. Wherever the bullheads congre- 

 gated to take food, there you would see the tadpoles also; in fact, they 

 were growing just as fast as the bullheads. But we were perfectly satis- 

 fied to feed them, because we are tising them now to feed our bass. 



Mr. Adams : Do you attempt to keep a stock of the adult bass 

 throughout the year, or do you collect your breeders each spring? 



Mr. Lydell: We keep a stock the year round. We have possibly 

 six hundred now, but if our stock gets low we introduce some each sea- 

 son from different localities. We prefer to collect stock fish in the late 

 fall. 



Mr. Adams : What do you feed your adult bass throughout the 

 year? i 



Mr. Lydell: Clam meal, minnows and crayfish. We start feeding 

 the clam meal right after the spawning season and continue until the 

 fish are put into the wintering ponds. From then on we feed them 

 minnows and crayfish. 



Mr. Adams: Do you see any objection to having a regular pond 

 for minnows to breed your own supply? 



Mr. Lydell: I think it would be an advantage to have a pond of 

 that kind. We have a great many crayfish in our ponds and they are 

 fed alive. Every pond is prepared for bass in the spring, and the large 

 crayfish are put in. 



Mr. Titcomb: Do the crayfish ever catch the young bass? 



Mr. Lydell: Hardly ever. Occasionally, when seining them up we 

 get too many crayfish in the net; then they will catch the bass. 



Mr. Adams: Adult fish of what size are generally collected for 

 breeding stock? 



Mr. Lydell: About three pounds. We have a great many of the 



