Hybridization 



Tine of Spawning Migration 



As defined in the subject index, two categories are included 

 under this heading: Time of Return from 0cean to stream Mouth 

 Time of Upstream Migration 



Size at Time of Return 



These references include data expressed either as length or 

 weight or both. 



Age at Time of Return 



Type of Spawning Stream 



Some additional data of this nature may possibly be included 

 in the sections treating the nature of spawning sites and the 

 section on distance traveled upstream. 



Distance Traveled Upstream 



Nature of Spawning Site 



Spawning Period 



This category includes both statements regarding the dates on 

 which spawning activity was observed or was about to occur , 

 and those statements of the duration of the spawning period. 



Sexual Dimorphism 



The majority of references in this category contain only brief 

 remarks on sexual dimorphism. Papers containing data only on 

 weight or length differences between the sexes are not included 

 in this section. 



Spawning Behavior 



Post-spawning Behavior 



Papers containing data on the activity of salmon after spawning, 

 even if the statements only indicated that the fish were observed 

 dying, are included in this category. 



Date Eggs Hatch 



Included in this category are records of both the date of egg 

 hatching and those noting the date salmon fry emerge from the 

 gravel and are first visible on the stream bottom. Hatchery 

 observations are not included. 



Behavior of Fry and Fingerlings 



Time Young Spend in Freshwater 



Information on this topic includes data both from scale readings 

 of young or adults, and from direct observation. 



Date of Seaward Migration 



Size at Time of Seaward Migration 



