TWENTY-EIGHTH BIENNIAL REPORT. 



53 



is necessary if we are to properly regulate the river and sea fishing 

 for salmon. We recommend that this work be continued and be 

 made part of the present progi^am. 



Caught Aug. 3, off the 

 California Coast near 

 Redding Rock . 



Length 30-^ in . 



Fourth year . 



Feb . 1922, age 3 years 

 Length 22>k in . 



Third year 



Feb . 1921, age 2 years 

 Length 13^ in . 



Second year . 



Liberated Nov . 

 Klamath River . 

 Length 2|- 

 First year . 



1919 in 



in 



Hatched Feb . 1919 . 

 Eggs taken Nov . 1918 

 from the Sacramento 

 River . 



Pig. 11. Photomicrograph of a scale of a king salmon of the 1919 marking experi- 

 ment indicating age and rate of growth. Photograph by J. O. Snyder. 



THE COLLECTION OF STATISTICS. 



The statistics collected by the Commission are for the purpose of 

 detecting overfishing in case it occurs, and for the study of the great 

 natural changes which occur in the abundance of the fish. It is, 

 perhaps, not generally known and appreciated that fishery statistics in 

 general are very defective, so much so, indeed, that it seems futile to 



