86 SALMON AND TROUT IN ALASKA, 



The Dolomi fish of 1903, only 200 in number, were much heavier 

 than those of 1904, but in this they but follow the rule exhibited by 

 other localities, in almost all of which the 1904 fish are lighter than 

 those of the previous year. It will be no'ted that in 1 904 the examina- 

 tion of Dolomi fish preceded that of Tamgas fish by about two weeks. 

 The latter were reported to be quite immature sexually, apparently 

 more so than the Dolomi fish of the earlier date. This may account 

 in a measure for their slenderness. In both these localities running- 

 small fish, two type forms are noted more distinctly than in streams 

 carrying the larger fish, viz, the slender terete form, usually dark, with 

 scales more or less embedded, but not showing the other marks of sex 

 maturity; and the deeper, more compressed form, with scales dis- 

 tinct and brightly colored. Fassett noted at Tamgas that one or the 

 other of these forms predominated on different days, indicating a 

 difference in schools. The dark fish may be fish which have been 

 feeding in the brackish water for some time. 



The fish of Karta and Yes bays, the heaviest of all , in 1 904 approached 

 one another closely in average weight, varying only 0.3 pound. Exami- 

 nation of the curves for weight, however, shows great difference. 

 The curve for Karta Bay is comparatively simple, rising to over 24 

 per cent on 7 pounds, extremes falling between 3.5 and 9.5 pounds and 

 showing little tendency to indicate a double ijode or maximum, while 

 Yes Bay shows 2 maxima, one on 6 pounds and one on 8 pounds, with 

 small numbers on 7 and 7.5; in addition the upper extreme rises to 10.5 

 pounds. The length curves exhibit this variance increased. In this 

 the line for Karta, showing some tendency to form a double node, 

 rises on the same maxima with Yes Bay, 490 mm. for the lower, and 

 550 mm. for the upper, but in the case of Yes Bay the percentages 

 on each are about equal (12 per cent), while for Karta they are, respec- 

 tively, 3 + and 21 .5 per cent. This shows that the relatively short fish 

 are found in much greater number among the Yes Bay examples, 

 reducing the total average length (std.) in this locality to 525 mm. 

 as against 538 at Karta, in the face of a slightly higher average weight 

 for Yes Bay. Reference to the depth curve again offers the explana- 

 tion. The two length types of Yes Bay cause the depth curve for that 

 locality to be somewhat truncated, rising to about equal height (14 to 

 16 per cent) on 140, 150, 160 mm. and reaching an extreme of 180 mm. 

 This indicates the prevalence of short deep fish in Yes Bay and long 

 slender fish in Karta Bay. 



In this year the Karta fish were examined about six weeks earlier 

 than those of Yes Bay. They were noted as nearly all bright, but 

 some were of advanced maturity, with the usual changed form. The 

 Yes Bay fish were noted as being of "advanced" maturity in out- 

 ward appearance, and it was said they were so from the beginning of 

 the run. The catches made in Behm Canal averaged smaller fish and 



