16. Average length and range of lengths for each age 



group of 106 channel catfish taken between T&Y Diversion 



and S-H Diversion on the Tongue River in the summer of 



1975 56 



17. Average lengths and range of lengths for each age 

 group of 132 channel catfish taken in the lower 



Tongue River in the fall of 1976 57 



18. Summary of angler returns of tagged channel catfish. 



Tongue River, 1975-76 59 



19. Summary of historic flows (1931-1975) on the Tongue 

 River as related to recommended instream flows by 



season 66 



20. Predicted impacts of three agricultural development 



levels on the flow of the Tongue River 68 



21. Summary of predicted impacts of three projected levels 



of industrial development of Tongue River water 70 



22. Summary of warm-water fish plants in the Tongue River 



Reservoir, 1963-75 88 



23. Summary of trap net catches by zone in the Tongue 



River Reservoir, 1975 89 



24. Summary of trap net catches by zone in the Tongue 



River Reservoir, 1976 90 



25. Comparison of trap net catches: Tongue River 

 Reservoir, 1972-76 (expressed as numbers per net 



night) 91 



26. Summary of gill net (bottom) sets in the Tongue 

 River Reservoir, 1964-76, expressed as numbers of 



fish per net set 92 



27. Catch statistics of 18 overnight gill net (bottom) 



sets. Tongue River Reservoir, July 1975 and 1976. 93 



28. Average lengths and weights of northern pike 

 caught in trap nets in the Tongue River Reservoir, 



1972-76 94 



29. Population estimates of northern pike determined 



from trap net catches. Tongue River Reservoir, 1974-76 96 



30. Summary of northern pike tag returns by year for 

 Tongue River Reservoir, 1973-76. (Number in parentheses 



is the percentage of total tagging.) 97 



