American Fisheries Society 137 



shore into the pond a distance of ten feet and having six or 

 eight inches of water, the second terrace also ten feet wide 

 and with about two and one-half feet of water, whence 

 the bottom gradually slopes to the kettle or deepest part of 

 the pond. This experiment was tried on one side of one of 

 our ponds, the opposite side being left in its natural shape, 

 that is, starting with a feather edge and gradually sloping 

 to the deepest part. This was done to decide whether we 

 derived any benefit from our experiment. The result was 

 that two very important difficulties were overcome: First, 

 the nests being placed on the deeper terrace, the spawning 

 bass were never disturbed by people strolling around the 

 ponds ; and. second, the fry, as soon as they left their nests, 

 would seek the shallower terrace, where the adult bass were 

 hardly ever known to venture, thus giving the young almost 

 perfect immunity from their cannibalistically-inclined par- 

 ents. When we commenced seining our No. 1 fingerlings, 

 very few were found in any part of the pond except on this 

 shoal or inshore terrace. 



DISCUSSION 



Mr. W. O. Buck, Neosho, Mo. : Dr. Bean mentions a change of 

 temperature of ten degrees between the water of the lake in which 

 the bass were reared and the temperature of the hatchery water. Now 

 the increase of the parasites in the hatchery would seem to suggest 

 that the hatchery water was the warmer. Was that the case? 



Dr. Bean : No, the singular thing was that the hatchery water was 

 colder. It is possible these fish were attacked in the ponds and the 

 disease developed as soon as their vitality was reduced. 



Mr. L. L. Dyche, Lawrence, Kans. : The appearance of these para- 

 sites would indicate that they were in the fish before they were trans- 

 ferred, would it not? 



Dr. Bean : I think so. 



Mr. E. N. Carter, St. Johnsbury, Vt. : In the past five years we have 

 transferred bass from Lake Champlain to St. Johnsbury Station in the 

 spring of the year and hatched eggs. We have had greater success in 

 handling those fish than the fish that were held at the station. Some 

 nests yielded as many as 20,000 fry. 



Mr. Clark: Counted fish? Did you count the fry from the nest? 



Mr. Carter: Yes, absolutely. 



President: Large mouth or small mouth? 



Mr. Carter: Small mouth. Up to last winter we were not able to 



