The radius of influence of the three sections of the river 

 was determined on the basis of the number of parties coming from within 

 a radius of 25, 50, 100, 200, and 300 or more miles It will be noted 

 from Table 8 that the radius of influence became progressively greater 

 from the Lower to the Upper Section of the river. Over 80 percent 

 (83 o3) of the fishing pressure came from within 100 miles in 1950 as 

 compared to over 85 (86. I4) percent from over 100 miles in 1952. The 

 Middle Section was in an intermediate position. The circumstances in 

 regard to usage from within a 100-mile radius were to be expected 

 since the upper reaches of the Madison lie in a thinly-populated 

 mountainous area; it is only in the lower reaches that it gets into 

 an area of significant population. The fact that the fishing pressure 

 from over 300 miles radius increased progressively from the Lower to 

 the Upper Section, (Lower Section, 5o2 percent; Middle Section, 22.14 

 percent; and Upper Section, Li3.9 percent) tends to emphasize the 

 aforementioned thought that nonresidents were attracted by the pro- 

 gressively more natural beauty of the upper sections of the river and 

 proximity to Yellowstone National Park. 



Many fishermen, especially nonresidents, came to the Madison 

 for extensive periods, making use of the many available camp sites or 

 cabin camps. Some of these people indicated that they made annual 

 fishing and vacation trips to the Madison. This attests, at least in 

 part, to the esteem in which many fishermen hold the Madison. Although 

 the majority of these people stayed in the area less than 2 weeks, some 

 stayed as long as 30 to 60 days. 



FISHERMAN -EXPENDITURE STUDY 



Data on fishermen's expenditures were obtained during all 

 three years of the Madison River study, on the basis that fishermen 

 expenditures are a partial reflection of the value of the fishery. 

 In the following analysis, the total and component parts of the 

 average daily expenditure per person have been determined for the 

 three sections of the river (reservoirs included) studied in the re- 

 spective years of the investigation, and in turn applied to the 

 respective estimates of the total number of fisherman-days and yield,, 

 Total expenditures have been derived for each reservoir and each sec- 

 tion of the river and summarized for the Madison River as a whole. 



Transportation Expenditures 



The average round-trip mileage and transportation expendi- 

 ture for the three sections are shown in Table 9. 



27 



