SEAWARD MIGRATION OF CHINOOK SALMON. 



39 



Table 39. — Young Chinooks from McCloud River, Baird, Cauf., Nov. 18, 1911. 

 ninety-four specimens without new growth. 



Length. 



131 to 135 mm. 

 116 to laom m . 

 Ill to nsnim. 

 106 to IloTTim. 

 loi to 105 mm. 

 96 to zoo mm... 

 91 to 95 mm . . 



Av. loi.smm. 



THIRTY-SIX SPECIMENS WITH NEW GROWTH. 



Length. 



Scale record. 



.\verage nxunber of 

 rings— 



To new 

 growth. 



Of new 

 growth. 



Average length of 

 anterior radius — 



To new 

 growth. 



Total. 



Average 



estimated 



length of 



fish at 



time of 



beginning 



new 



growth. 



Ill to 115 mm. 

 106 to 1 10 mm. 

 loi to losmm. 

 96 to 100 mm. . 

 91 to 95 mm. , . 

 86 to 90 mm. .. 



Av. loo.smm. 



14. 6 

 13-4 

 13-4 

 13- o 



4.0 

 1.8 

 1.8 

 1.8 

 2. o 

 3.0 



49.0 

 50. o 

 45-4 

 41.4 

 35- 7 

 32- 2 



59-0 

 58.0 

 SI. J 

 51.4 

 43-7 

 43- o 



92- S 

 90.1 



83.0 

 80.0 

 73- o 



43- I 



SI. 8 



8s-9 



A collection made December 18, 1916, contains 92 specimens. Only one is a 

 mature male, 108 mm. long. The scales of this individual show 16 rings, and the length 

 of the anterior radius is 59.8. Fifty-one (56 per cent) of the 91 immature specimens had 

 beg^n the rapid growth of the new year. The average length is 101.2 mm. Forty-five 

 males average 101.9 mm. and 46 females 100.6 mm. The table (40) follows: 



Table 40. — ^Young Chinooks from McCloud Rtver, Baird, Calif., Dec. 18, igii. 



FORTY SPECIMENS WITHOUT NEW GROWTH. 



Length. 



Number. 



Scale record. 



Average 



nmnber of 



rings. 



Average 

 length of 

 anterior 

 radius. 



116 to 1 30 mm... 

 Ill to nsmm... 

 106 to no mm... 

 loi to 105mm,,. 



96 to 100 mm 



91 to 95 mm 



86 to 90 mm 



Av. 100.5 mm. 



18.0 



17-0 

 16.5 

 IS- 3 

 14.8 

 IS- I 

 13- o 



IS- 3 



55- o 

 49.0 

 53-4 

 50,0 

 46.3 

 46.5 

 38.0 



48. s 



