100 



FISHES OF ILLINOIS 



TABLE II 



Minnows and the Environment 



Relations to Current 



species and frequency coefficients 



Swift-water minnows 



Species 



Cliola vigilax 



Campostoma anomalum 

 Hybopsis kentuckiensis . 

 Phenacobius mirabilis. . 



Notropis whipplii 



N. atherinoides 



A', blennius 



Still-water minnows 



Species 



Coefficients 



Abramis crysoleucas. ... 2.79 



Xotropis umbratilis 1 . 76 



Hybognathus nuchalis... .1 1.38 



Pimephalea promelas. : 1.37 



Xotropis cdrnutus I 1.27 



Semotilus atromaculatus. 1.20 



Pimephales hotatus 1.09 



TABLE III 

 Relations to Bottom 

 species and frequency coefficients 



Preferring clean bottom 



Preferring mud bottom 



Campostoma anomalum. 



Ericymba buccata 



Hybopsis kentuckiensis. . 



Notropis cornutus 



Cliola vigilax 



Notropis blennius 



N. whipplii . . 



Phenacobius mirabilis. . . 

 Notropis atherinoides 

 Semotilus atromaculatus. 

 Notropis umbratilis 



Abramis crysoleucas . . 

 Pimephales promelas . 



Notropis lutrensis 



Hybognathus nuchalis 

 Hybopsis amblops. . . . 

 Pimephales notatus. . . 



1.09 



TABLE IV 



Principal Cyprinid^e of Large Rivers 



Species 



Xo. of 

 collections 



Frequency 

 coefficients 



Cliola vigilax 



X'otropis heterodon . . 

 ■N . hudsonius 



X*. lutrensis 



"N. jejunus 



N. atherinoides 



Hybopsis storerianus. 



1<>4 

 93 



117 



163 

 51 



206 

 2S 



1.04 



.98 



1.80 



1.43 



63 



21 

 2S 



