Biological Survey — Oswego Watershed 157 



and also in dry matter, 211 pounds and 221 pounds per acre re- 

 spectively. Oneida lake, on the other hand, contains much more 

 organic matter, 190 pounds per acre, and dry matter, 411 pounds 

 per acre. Such an increase in the organic matter in Oneida lake 

 when compared with Cayuga and Seneca lakes represents a large 

 increase in plankton organisms, as has been shown by their numeri- 

 cal counts made in the three lakes. Undoubtedly some of the in- 

 crease in organic weight also represents the remains of decomposed 

 plankton organisms, rooted aquatic plants, and particles of organic 

 material carried into the lake by streams. The weight determina- 

 tions, as well as the numerical counts of the plankton organisms, 

 indicate that the water of Oneida lake is capable of supplying, 

 directly or indirectly, a much greater amount of food for fish than 

 either Cayuga or Seneca lake. 



