The four incomplete censuses conducted during each biweekly period 

 were merely counts of the number of fishermen seen every hour while driv- 

 ing the thirty iriiles of fishable shoreline. Ideally, the driving trip 

 took four hours, with two trips made during the afternoon and two trips 

 made in the morning, of each biweekly period. The morning and afternoon 

 trips started from opposite directions. At some locations along the 

 shoreline, it was necessary for the observer to walk to a vantage point 

 from which he could see the area not readily seen from the highway. Such 

 areas were few in comparison to the entire shoreline, and the time spent 

 at such locations was distributed somewhat randomly by reason of the dif- 

 ferences in direction and time of incomplete censuses. The only quantity 

 recorded by the observer when conducting the incomplete census was the 

 number of fishermen seen during each hour of travel. 



The data gathered by the complete and incomplete censuses made it 

 possible to estimate the total hours of fishing effort, the total num- 

 ber of fishermen, and the total catch of fish for each 2-week period of 

 shoreline fishing, E^ substituting the appropriate data in the formula 

 below, the total hours of fishing effort were calculated; 



Nh-ro JL_±_H_ J K^i 



H 



1-1 1 



where the following notations were used: 



N — estimate of number of hours (N^, — estimate of catch) 



(Nj — estimate of fishermen) 



H — number of hours of fishing effort recorded in the complete 

 census (data from the four complete census are combined and 

 in calculation considered as one large census), (E number 

 of fishermen, C number of fish taken), 



D -■ number of days in the 2-week period 



d — niimber of days of incomplete census 



a — number of fishermen recorded in the complete census 



^11 "Z number of fishermen counted during the i"*^" hour of incomplete 

 census necessarily at the i^" length of shoreline 



Fj_ - number of fishermen contributing to Hj^ fishing hours 

 "^ — the sum of 



Thus, % - R jj and N^ - C 



H h H '^ h 



21 



