100 



FISHES OF ILLINOIS 



TABLE II 



Minnows and the Environment 



Relations to Current 



species and frequency coefficients 



Swift-water minnows 



Still-water minnows 



Species 



Coefficients 



Species 



Cliola vigilax 



Campostoma anomalum 

 Hybopsis kentuckiensis. 

 Plienacobius mirabilis. . 



Notropis whipplii 



N. atherinoides 



X. blennius 



46 

 70 

 38 

 32 

 .30 

 .19 

 .18 



Abramis crysoleucas. . . . 

 Notropis umbratilis. .... 

 H ybognathus nuchalis . . . 

 Pimephales promelas. . . . 



Notropis cornutus 



Semotilus atromaculatus 

 Pimephales notatus 



TABLE III 

 Relations to Bottom 

 species and frequency coefficients 



Campostoma anomalum 

 Ericvmba buccata ...... 



Hybopsis kentuckiensis. 



Notropis cornutus 



Cliola vigilax 



Notropis blennius 



N. whipplii 



Plienacobius mirabilis. . . 

 Notropis atherinoides. . . 

 Semotilus atromaculatus 

 Notropis umbratilis. . . . 



Abramis crysoleucas . . 

 Pimephales" promelas . . 

 Notropis lutrensis. 

 Hybognathus nuchalis 

 Hybopsis amblops. . . . 

 Pimephales notatus. . 



79 

 .08 



1 69 



68 

 50 



1.09 



TABLE IV 

 Principal Cyprinid.* of Large Rivers 



Spo "':-■ 



Cliola vigilax. . 

 Notropis heterodon 



N. hudsonius 



X. lutrensis 



\ jejunus. . . ■• 



N. atherinoides 



Hybopsis storerianus 



No. of 

 collections 



194 



93 

 1 17 

 163 



51 

 206 



28 



Frequency 

 coefficients 



1 04 

 98 



so 



i I 



l 63 



21 



28 



