30 



PAPERS ON ZOOLOGY OP MICHIGAN. 



The fish taken from this habitat were larger than those of the same 

 species taken from the north bay. The presence of both the large- 

 mouth black bass, Micropterus salmoides, and the small-mouth black 

 bass, Micropterus dolomieu, in the ratio of three to one, is a character- 

 istic feature of this habitat. 



The lake proper has four types of habitats, each of which must be 

 dealt with separately: (1) the shallows and shoals; (2) the deep water 

 near the step-off; (3) the mid-lake portion not exceeding 20 feet in 

 depth ; and (4) the deep cold water below the 20 foot line which includes 

 most of South Fishtail Bay. (See map, Fig. 2). 



In the shoals and shallows of South Fishtail Bay schools of young 

 perch, Perca flavescens, shiners, Notropis hudsonius, N. cayiiga, and N. 

 cornutus, young suckers, Catostomus commersonii , blunt-nosed minnows, 

 Pimephales notatus, and an occasional individual of the Johnny darter, 

 Boleosoma nigrum, are found. Each of these species, however, is very 

 abundant on the more rocky shoals between Grapevine and Bogardus 

 Points, on the east side of Fairy Island, and along the northeast side 

 of the lake (See map, Fig. 2). The relative frequency of these various 

 species is seen in the following table, the combined results of seven 

 different long-shore seinings made at various times during the sessions 

 of 1913 and 1914: 



TABLE NO. 5. 



Practically all of the records included in Table 5 were adults of the 

 species, excepting the perch, suckers, and pumpkin seeds. The adults 

 of these three species frequent the deeper water of the lake, but lay 

 their eggs in the shallows where the 3'oung remain until they are large 

 enough to avoid the enemies commonly found in the deeper waters. 

 Since the young suckers and perch are so abundant they form a very 

 important part of the life of this habitat. 



Just over the step-off, in water ranging from 10 to 20 feet deep in 

 situations where the aquatic vegetation is more or less abundant, the 

 trout perch, Percopsis guttatus, and yellow perch, Perca flavescens, are 

 very abundant. Here also the schools of the log perch, Percina 

 caprodes, are found, but the last species is by no means as abundant 

 as the. other two. The largest schools of the log perch were found 



