Table of Contents 



List of Tables " 



List of Figures " 



List of Appendices • "* 



Executive Summary 1 



LO Introduction 3 



2.0 Whirling Disease and the Madison River 4 



2.1 Mechanism and Biology of the Disease 4 



2.2 History of Whirling Disease on the Madison River 5 



3.0 Methods ^ 



3.1 Creel Methods, 1995 9 



3.2 Creel Methods, 1996 10 



3.3 Creel Methods 1975, 1976, 1977, and 1981 H 



4.0 Results 13 



4.1 Creel Results for 1995 13 



4.1.1 Catch Rates 13 



4.1.2 Angling Pressure 14 



4.1.3 Angler Characteristics and Satisfaction 15 



4.2 Creel Results for 1996 19 



4.2.1 Catch Rates 19 



4.2.2 Angling Pressure 19 



4.2.3 Angler Characteristics 21 



5.0 Discussion 22 



5.1 Historic Creel Comparisons 22 



5.1.1 Catch Rates and Composition 22 



5.1.2 Angling Pressure 26 



5.2 Population Estimates 27 



5.3 Impacts of Whirling Disease and Management Implications 29 



6.0 References Cited 32 



Evaluation of 1995 and 1995 Creel DaU and Ks Implications Related to Whirling Disease 

 in the Madison River. Montana 



Montana Fish, Wildlife and Partes 

 March 12.2002 



