MARINE BARRACKS
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necessary.-The most positive in this case is a count' of the Pyloric
Caec^ - folds.or projections on the stomach wall which the fish uses
to aid digestions Each species has a certain set limit on the number
of these, and by counting them, a biologist can accurately determine
the species. Anyone desiring to know the numbers of pyloric caeca
for each species-1 can obtain this information from the Command Conser
vation Officer. ...
The famjJnae Salmoni’dae is composed of three major sub-divisions
or general Salmon, Trout and Char. Characteristics.-of the most commons
Silver Salmon (Coho) - black spots on upper lobe of caudal fin
only
Chum Salmon (Dog) - no distinct spots on back or caudel fin
n _ very lightly speckled
oockeye Salmon (Red) - no spots
Pink Salmon (Humpback) - very large black spots on back and
caudal fin ... - (
Rainbow op Steelhead Trout - black or brown spots on body^caudal
. fin covered with black spots
Cutthroat Trout - distinct red dash on underside of lower jaw .
Brook Trout - red spots blue ringed, dorsal fin white tipped
Dolly Vardeft- though this is commonly referred to as a "Trout"
it is actually a Char. Dorsal fin is not tipped,
red spots not ringed in blue and spots smaller
than eye
Arctic Char - red spots larger than eye
Some other terms commonly used in referring to fish life ares
redd - spawning nest, a depression in gravel or sand5 parr - young
Salmon in fresh water before its migration to salt water; smolt
young Salmon which have started their down stream migration.
Fish that migrate from salt water “back to fresh water to spawn
are. called anadrAmoils, such as the sea-going elements of the Salmon
family. The opposite, fish that migrate to salt water to spawn,
such as the fresh water eel, are called catadromous.
RAINBOW FRY
As reported earlier in this column, Major HENZEL, the Command
Conservation Officer, made arrangements, while on the Mainland,
t° have some Kamloop Rainbow Trout fry brought to Adak to be put in
the Lake Andrews Fish Hatchery. They arrived last Tuesday. When
these fry grow, to fingerling size they will be planted in various
waters on the island Tin about four to six weeks.) The fry were
brought to Adak by Mr. Jerry SEXSMITH, Alaska Fish and Game bio
logist who brought them from. Kodiak.
Unfortunately, while the fry were in transit from the State Hat
chery near Anchorage to Kodiak, a malfunction in the oxygenation
(a process whereby pure oxygen is allowed to escape through the
water in which the fry .are.,, thereby giving them sufficient oxygen
to live in a closed container - trout require a considerable amount
of oxygen anyway as compared to other fish) -caused about half of the