IV-547 



three and four to commercial fishery landing values, but the magni- 

 tudes of such multipliers depend on the structure of the local 

 economy as well as on other factors and generalities are likely to 

 be misleading. 



The relationship of the estuarine zone and commercial fishing cannot 

 be expressed by any simple economic index. The importance of 

 commercial fishing in the estuarine zone is related economically 

 not only to estuarine habitat, but also to transportation, commerce, 

 food processing, and aquaculture. 



Recreation 



Each kind of recreational use has its own economic impact. 

 Recreational boating supports a large boatbuilding, marina, and 

 boat repair industry. Sport fishing supports not only a certain 

 part of the boating industries, but also a very specialized industry 

 manufacturing and selling fishing tackle. For example, the 1965 

 Survey of Fishing and Hunting shows that salt-water anglers spent 

 $800 million dollars in that year. Sightseeing and swimming support 

 motel and restaurant services in the favored areas, as do other over- 

 night recreational activities. 



Attempts at the quantification of overall recreational economic 

 values are not yet well developed. The user-day recreation benefits 

 approach has been used in some federal waterway and reservoir projects, 



