FISHES OF COLORADO' 



By Max M. Ellis 



PAGE 



I. Introduction and Acknowledgments 5 



II. Hydrography of Colorado 6 



III. Systematic Account 12 



Catfishes, Siluridae 15 



Suckers, Caloslomidae 19 



Graylings, Thymallidae 71 



Trout and Whitefish, Salmonidae 73 



Killifishes, Poeciliidae 86 



Eels, Anguillidae 91 



Sunfishes and Bass, Cenlrarchidae 93 



Perch and Darters, Percidae 102 



Sculpins, Coltidae 113 



Summary of Species 116 



IV. Distribution of Fishes in Colorado 116 



Relations to River Systems 116 



Relations to Altitude 122 



V. Changes in the Fish Fauna of Colorado 127 



VI. Economic Species 129 



VII. Glossary 131 



VIII. Species Index 133 



This review of the fish fauna of Colorado is based primarily on 

 collections^ made during the years 191 2 and 1913 with the patronage 

 of the Museum of the University of Colorado, as a part of the State 

 Biological Survey. Through the generosity of the officials of the 

 various museums in the state the writer has also had free use of the 

 ichthyological material in their collections. In order to include data 

 gathered by previous workers whose collections were not accessible, 



' Publication of the Colorado Biological Survey, No. 15. The Amphibia and Reptilia of Colorado were 

 treated in Publication No. 14, being Vol. X. No. 2, of these Studies. 



•The fishes were killed in the field with s per cent formalin, pierced or injected, and preserved in 8s 

 per cent grain alcohol . 



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