SEAWARD MIGRATION OF CHINOOK SALMON. 



41 



Table 41. — Young Chinooks prom McCioud River, Baird, Calif., Jan. 22, 1912 — Continued. 



FORTY-THREE SPECIMENS WITH NEW GROWTH. 



Length. 



Number. 



Scale record. 



Average number of Average length of 

 rings — ! anterior radius — 



To new 

 growth. 



Of new 

 growth. 



To new 

 growth. 



Total. 



Average 

 estimated 

 length of 

 fish at 

 time of 

 beginning 



new 

 growth. 



Ill to iisnmi. 

 106 to 1 10 nun. 

 loi to 105 mm. 

 96 to 100 nun. . 

 91 to 95 mm. . . 



13-7 



13-3 



13. 2 

 12.9 



II. o 



44-3 

 44.9 

 40. 2 

 39- 7 

 32. o 



SS-2 

 55-8 

 49- S 

 49- S 

 43.0 



90.5 

 90. o 



»S S 

 81.5 

 73- o 



Av. 1040 mm . 



■3-2 



41. s 



51-7 



86.0 



February 27, 1912, 26 specimens were taken. One is a mature male, 127 mm. 

 long. The scales of this individual show 18 rings in the first year's growth and i in 

 the second year's growth. The length of the anterior radius is 51 to the beginning of 

 the new growth and 57 to the periphery of the scale. The estimated length at the 

 time of beginning the new growth is 114 mm. Twelve of the immature specimens 

 show the new growth at the margins of the scales. The other 13 specimens terminate 

 the scale growth in winter rings. The average length of the entire collection is 11 1 .6 mm. 

 Twelve males average 110.9 mm. in length; 13 females, 112.2 mm. The table (42) 

 follows : 



T.\BLE 42. — Young Chinooks from McCloud River, Baird, Calif., Feb. 27, 1912. 

 THIRTEEN SPECIMENS WITHOUT NEW GROWTH. 



Average length. 



Scale record. 



Average 

 number 

 of rings. 



Average 



length of 



anterior 



radius. 



16.9 



TWELVE SPECrMENS WITH NEW GROWTH. 



