'^ 



• 



Figure 4. — Stages of development of silver salmon {Oncorliynchus kisutch ) from eyed 

 egg to feeding fingerling. Approximately twice normal size. 



spawning beds. In addition, death 

 from other natural causes, inchid- 

 ing- disease, reduces the brood. Top- 

 ping all of these hazards are man's 

 nets and hooks, and his dams and 

 pollution, which take a large toll of 

 the remnant of the original brood. 

 Fortunately, nature was so very 



generous in the stock of fish surviv- 

 ing to enter the rivers to spawn that 

 in most instances a spawning stock 

 was left even after man's take and 

 destruction, although man has been 

 (horougli in his harvesting or de- 

 struction of entire runs in some 



