THE EFFECT OF TEMPERATURE ON THE TAKING OF SALMON. 



685 



Table showing the highest and lowest weekly temperature, the amount of 

 variation in the weekly temperature, and the average number of salmon 

 caught by each ' rod ' daily during each week of the rod-fishing season of 



1900. 



Date. 



Temperature. 



Amount 



of Variation 



in Temperature. 



Average Number 



of Salmon caught 



daily by each 



'Rod.' 



Sept. 1-8 







No fishing. 



10-15 







do. 



17-22 



60-52 



8 



1-13 



24-29 



54-48 



6 



1-38 



Oct. 1-6 



49-45 



4 



1-82 



8-15 



50-45 



5 



151 



Table showing the highest and lowest weekly temperature, the amount of 

 variation in the weekly temperature, and the average number of salmon 

 caught by each ' rod ' daily during each week of the rod-fishing season of 



1901. 



Date. 



Temperature. 



Amount 



of Variation 



in Temperature. 



Average Number 



of Salmon caught 



daily by each 



'Rod.' 



Sept. 2-7 



9-14 

 16-21 

 23-28 

 30-Oct. 5 



7-15 



52-58 



60-55 

 50-57 

 55-60 

 56-50 

 47-44 



6° 

 5 

 7 

 5 

 6 

 3 



0-68 

 0-76 

 1-46 

 1-37 

 1-68 

 251 



On referring to the foregoing Tables and to the Diagrams it will be found that salmon 

 rod-fishing took place on 131 days, and that the average number of salmon caught by 

 each 'rod' on each day during that period was 1*36 ; also, that the average weekly 

 variation in the temperature was 6 "3 6° Fah. It is shown also that when the weekly 

 variation in temperature was only 3° the weekly average of salmon taken by each 

 ' rod ' in the day was as high as 2'51, and when the weekly temperature varied as much 

 as 12° the weekly average of salmon taken by each ' rod ' in the day fell to 0'40. 



The following Table shows the whole series of weekly variations in temperature 

 during the above mentioned period of 131 days, with the relative numbers of salmon 

 taken daily by each ' rod.' 



