REARjyO SOCK EYE SALMON 



109 



SESSIONAL PAPER No. 38a 



sea with no special effort. The spawning effort itself should have been as severe on 

 these as on those spawning under natural conditions or those artificially spawned. The 

 physiological condition of the body must have become changed under the changed con- 

 ditions of life, so that the fish has become, in its nature, more like a fish that normally 

 remains in the fresh water throughout its existence. This may indicate that the genus 

 Oncorhynchus is even more intimately related to the genus Salmo than has been sus- 

 pected. 



Mr. Doak has some pond-reared sockeye younger than these, and some coho at 

 different stages as well, hence there is every chance for him to follow up the experiment 

 far enough to get quite decided results. 



EXPLANATION OF FIGURE. 



The figure is from a photograph of a scale from a 4-year-old sockeye that was 

 reared entirely in fresh water, taken from the fish on January 29. The numbers 1, 2 

 and 3, indicate the limit of the first, second and third year's growth, respectively. The 

 margin is the limit of the fourth year's growth. 



