Table 3. --Continued 



Date: 

 1953 



Mean water Water 



temperature , level 

 (°F.) I (inches) 



Weather 



Number 

 taken 



I Sea lampreys 



Total length (millimeters) 

 Average | Range 



\l Trap inoperative during December 27-29 and February 22-23 due to severe ice formation on 

 the screens. 



2/ Trap inoperative during March 24-26 due to extreme flood conditions. 



3/ Based on 1, 074 specimens. 



4/ Trap dismantled on June 19, 1953. 



15 



