The Salmon 119 
to die, and continue to drop off until the end of the spawning 
season, when nearly all die. So infectious is the disease that three 
years ago on the river 
Almond about a hundred 
fish died per day in a dis- 
tance of less than a mile. 
Whenever there was a slight 
flood in the river large num- 
bers of fish without a spot 
on them ascended, and in 
November 1906. 
the: course of a few days 
nearly all became affected 
and -died (Figt 115): One 
or two white spots appear 
on the head or the dor- 
Sal tine these “are Vat 
first very small, but in two 
or three days the disease 
spreads rapidly. The fish 
jumps frequently, as if to 
tnyavo) Kid-dtselli of “it, sbut 
soon becomes exhausted 
and _ dies. Autumn fish 
16-lb. Female Salmon, partly spawned, almost dead. 
appear better able to with- 
Po= 
stand the disease than 
lays, Si 
spring fish just from the sea, 
for a spring fish will often 
die with only one spot 
on its head no larger than 
a shilling, while an autumn 

fish will live although its 
ence body valmost sis "covered, Whe disease takes the ereatest 
hold when a fish is about!to spawn, more especially if the weather 
be cold, and many hundreds fall victims to its ravages. The accounts 
