232 



Aquatic Organisms 



dwells habitually in the deep waters of the lake. One 

 other species, the common sucker, is a regular inhabit- 

 ant of water between fifteen and forty feet in depth. 

 The pike, ranges the upper waters at will pursuing his 

 prey over both depths and shoals; but he appears to 

 prefer to lie at rest among the water-weeds where his 





Fig. T39. Ale-wives (Clupea pseudohurevgus) on the beach of Cayuga Lake, 

 after the close of the spawning season. A single large sucker lies in the 

 foreground. 



great mottled back becomes invisible among the lights 

 and shadows. 



The pondweed zone on the sloping bottom between 

 five and twenty-five feet in depth is the haunt of most 

 of the remaining species, including all the minnows, cat- 

 fishes, sunfishes, and the perches. The last named 

 wander betimes more freely into the deep water; all of 



