Aniericiiii Fisheries Society. 



51 



ping stones, they wriggle like a worm in sinking and are then 

 readily taken. The liver must be fresli ! We found, however, 

 if the fish are fed on liver alone they do not come out of Avinter 

 quarters in good condition. Of eleven nests made l)y bass thus 

 fed, only three produced fry. Although eggs were laid in all 

 they seemed to lack vitality owing to the poor condition of the 

 parent fish, and in eight of the nests the eggs died. 



In order to l)ring the fish through the winter in good condi- 

 tion it is necessary to begin feeding minnows in Septeml^er, and 

 to continue this until the fish go into winter quarters. 



HAULING DAPHNIA. 



The bass eat minnows until they go into winter quarters, 

 after which they take no food until spring. The minnows are 

 left in the ponds over winter so that the bass, when they come 

 out of winter quarters, find a plentiful supply, which lasts them 

 until the spawning season. At this time the minnows are seined 

 from the pond as their presence interferes with the spawning. 

 Before this, however, some of the minnows have spawned and 

 their fry later serve the young bass as food. When bass are fed 

 in this way, they come out of winter quarters in fine condition 

 and their eggs are found to be hardy. 



2. Artificial Fertilization. 



During the first two or three seasons of our work numerous 

 attempts were made at artificial fertilization, but like all other 



