9 
herring. If the schools wander far there might easily be much mixing. If their 
wanderings are restricted to a comparatively small area such mixing would 
not so likely take place to any extent. Coast conditions along the British 
Columbia coast are not readily comparable to those of the Norwegian coast 
and with regard to two distinct species one may do nothing more than surmise 
that the same habits would prevail. 
In any case, after a fish has once spawned there is every indication that the 
process is an annual one for the remainder of its life. It is probable that after 
the first spawning the individual remains with the same school throughout the 
rest of its life, although this would be a difficult matter to prove. 
Extensive observations over a long period would be necessary to demonstrate 
the racial differences in the different schools, but there is little doubt that such 
differences exist; even though, in the main, their habits, times of migration, etc., 
may be very similar. 
The majority of the fish caught in the purse seines are from’4 to 7 years old 
and none have been found of a greater age than 10 years. 
EBL 
