Current Research
(Continued trom Page 5)
stomachs of these fish during the
pink fry migration we calculated
that in the spring of 1961, one hun
dred thousand, or 12 per cent, of
the pink fry were probably eaten
by sculpins. Studies are under way
to learn how this predator can ne
controlled. This year the sculpin
population in Big Kitoi outlet was
eradicated with toxaphene. The
management implication is that
this method of predator control is
applicable to any salmon 6tream
not containing resident fish. The
oretically this experiment should
increase the production of pink fry
in Big Kitoi streams by 12 per
cent.
Studies of dolly varden trout in
Little Kitoi Lake have developed
several facts of immediate impor
tance to fishery management. First,
the dollies winter over in the lake,
go to sea with sockeye smolt in
spring and return to the lake with
adult sockeye in the fall. This
means that a lake dolly population
can easily be controlled by merely
placing a trap at the lake outlet.
Second, we found that in the two
or three month period the dollie3
remain in saltwater they gain as
much as a pound in weight depend
ing on their original size and their
condition is greatly improved. This
means that if dollies are harvested
commercially they should be cap
tured on their way INTO and not
out of a lake system.
A LOOK TO THE FUTURE
' What can we do at Kitoi Station
in the future to help solve urgent
fisheries problems? Here are some
of the things we can accomplish:
1. Ladder the falls now blocking
Big Kitoi Lake to gain access to
the 360 acres of rearing area it
contains. The lake can then be re
habilitated and planted with fry
raised in the Kitoi hatchery. Wre
could, potentially, achieve a run of
100.000 sockeye salmon.
2. Find answers to problems of
required density of eggs for high
est production from upwelling
spawning channels now being de
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veloped at Kitoi Station. These ex
periments may give us a type of
artificial spawning channel to in
stall in streams with low discharge.
3. Construction of a lateral-flow
artificial spawning channel in Big
Kitoi outlet after the control dam
is built will enable us to compare
lateral flow channels with upwell
ing channels, and help answer the
question of how many fish should
we allow in the streams to spawn
and which part of spawning run is
most productive.
4 In 1962 a lake near the Kitoi
Stat on will be treated with toxa
phene. This is an experiment de
signed to tell us how long a lake in
this area remains toxic and how
long it takes for the food organ
isms to “come back." These an
swers are urgently needed since
chemical eradication of undesir
able species of fish is a most prom
ising tool in any rehabilitation
work on barren areas.
5. Kitoi Bay Research Station is
ideally situated for both fresh
water and marine research. It will
be of benefit to Alaska to encour
age scientists from universities and
other research agencies to study at
Kitoi. With increased housing fa
cilities we expect to have many
more visiting scientists in the fu
ture.
Confusion reigns when people
who don’t know what they want, go
after what they think they ought
to have.
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