The Productivity of Fish Food in Oneida Lake i/^y 



observed in Oneida Lake. Statoblasts of Pluinatella, etc., 

 have been found in the stomach of certain fish (Baker 'i6, 

 pp. 165, 181, etc.). The molluscan eggs have a potential food 

 value developing into the class of animals eagerly sought by 

 many fish. 



The characteristic or dominant animals on each variety of 

 bottom, from a quantitative standpoint, are noted below and 

 these animals may be said to characterize the community, so 

 that we may speak of a Goniohasis-Galha-Helico psyche com- 

 munity, an Amnicola-Hyalella-Chironomid community, etc. 



In the area outside Lower South Bay the characteristic 

 animals, Cjuantitatively, are : 



Boulder bottom: Goniohasis, Amnicola bakeriana nimia, HcUcopsychc, 



Hyalclla, Naididse, Chironomid larvae. 

 Sand bottom : Bythinia, Amnicola bakeriana nimia, Valvata tricarinata, 



Hyalclla, Cladocera, Chironomid larvae. 



On the mud bottom in deeper water, tlie characteristic forms, 

 numerically, are : 



Table No. 42. Characteristic Amaials of Deeper Water 



The entire area under consideration, having so heavy a 

 covering of filamentous algae, may be designated an algal eat- 

 ing community, the exception being the boulder areas where 

 there is but little or no algae, probably on account of wave 

 action. 



In the tables it will be noted that a characteristic species 

 may be common in shallow water and rare in deep water and 

 vice versa. The dominant species appear to occur, in this 

 locality at least, associated with many other forms of animal 



