|HATCHERY HOLDING TANK
|The rainbow trout
that are planted in our area are raised in Friant, California at the DFG's San
Joaquin Hatchery located at the base of Millerton Lake. Five different strains
of rainbow trout are shipped to Kern River Fish Hatchery at different times of
the year. Stocking Information.
Trout Program beauties are held and fed until they weigh near 4 lbs. They are
released into the upper Kern River areas only along with regular trout
|The Little Kern Golden Trout restoration project began in
1972 with the discovery that the pure genetic strain of the Little Kern Golden
Trout was being lost. In 1978 the Golden Trout Wilderness was designated and
the Little Kern Golden was listed as a "threatened species".
tried to spawn wild Golden Trout on the stream, but since there were so few
Golden Trout left and fish didn't spawn at the same time, very little progress
was made. In 1983 a brood stock was begun at the hatchery. Five different
strains of Little Kern Golden's have been raised at the hatchery. In 1994, 110
females produced 153,224 eggs resulting in 90,000 fish being planted in the
Little Kern drainage. The project is nearing completion now that the Little
Kern Golden has made a good recovery and been proposed for removal from the
"threatened species" listing.
|The Kern River Hatchery fish loader was designed by
farmers needing a fast, automated method of taking water out of ditches for
irrigation. In the old days fish had to be loaded with nets by hand. A conveyer
belt was used next until the fish loader was designed in the 1960's. The fish
are basically vacuumed into the tank and flushed into the planting transport
|The hatchery water supply comes
directly from the Kern River, originating from the snow pack north of Mt.
Witney. Temperatures vary from 33° F, in the winter, to as high as 87°
F during drought periods. The average summer temperatures range from 65° to
75° F. The small streams carry water from the river to tanks and back to
The fish seen in the streams, on the grounds, are escapees
from the holding tanks. You may see some jumping out where the water enters the
tanks. Although removed periodically, some do manage to find their way into the
|Trucks equipped with fish tanks are the
principal means of transporting fish. Tanks are constructed of fiberglass or
aluminum and are insulated to control temperature rises. Trout cannot use
oxygen in the water when metabolic waste (ammonia, urea, carbon dioxide)
concentrations are high. The accumulation of fish wastes can be controlled by
withholding feed before shipment and the use of ice to lower water temperatures
to 48° - 50° F. Aerators are used to circulate water through the tank
and gaseous oxygen is pumped into the water through airstones.
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