196 American Fisheries Society 



must be adjusted to one another. The copper sulphate treatment 

 of the waters not only kills, to some degree, the food supply of 

 young fish, but some fish as well. At present we do not have 

 sufficient data to make this treatment wholly satisfactory, and a 

 technical investigation of the problem is urgently needed, before 

 intelligent practice can advance safely. 



2. Report on Lakes and Ponds. 



Hessian Pond (Highland Lake). 



1. Physical Conditions and Vegetation. This is a deep 

 lake, a large area covering from 25-35 feet in depth. The deepest 

 sounding found was about 40 feet. The lake is clear and spring 

 fed. The west shore is rocky and steep, and the other shores have a 

 narrow shelf, largely sandy and gravelly. Near the north end 

 is a small island with a shallow bayou on the north. There are 

 but few water plants, most of which were at the south end and 

 in the shallow bayou at the north. 



2. Kinds and Abundance of Fishes. Golden Shiner, 

 Notemigonus crysoleucas (Mitchill), abundant; Eastern Pickerel, 

 Esox americanus Gmelin, one taken; Chain Pickerel, Esox tride- 

 cemlineatus Mitchill, probably abundant; Rock Bass, Ambloplites 

 rupestris Rafmesque, one seen; Long-eared Sunfish, Lepomis 

 auritus (Linnaeus) , abundant ; Common Sunfish, Eupomotis gibbosus 

 (Linnaeus), not abundant; Large-mouth Blackbass, Micropterus 

 salmoides (Lacepede), few taken; Small-mouth Blackbass, Microp- 

 terus dolomieu (Lacepede), reported abundant; and Perch, Perca 

 flavescens (Mitchill); few taken. 



3. Conditions for Fish. As a whole the natural food supply 

 is not abundant. Artificial food, from lunches, is very abundant 

 during July and August. The breeding conditions for the kinds of 

 fish present are favorable. Very few natural fish enemies. Anglers 

 numerous. 



4. Policy for the Water. This lake on account of its prox- 

 imity to Bear Mountain Inn and its large number of boaters 

 makes its fish cultural use wholly secondary. It is believed that 

 the fishing in this lake should be devoted mainly to the smaller 

 fishes and Perch, which should be encouraged to full capacity. 



