Current Research Activities
Substitutes Knowledge For Guesswork
(Ed. note: This is the second and
and concluding article on the Kitoj
Research Station on Afopiak Is
land. The first appeared in last
week’s Kodiak Mirror. Introduc
tory in nature, it told of the rea
sons for selecting the site, present
and future construction, personnel,
and objectives. Today’s article
deals mainly with predators and
the knowledge gained concerning
them, what to do about them to in
crease the fish runs of the future.)
CURRENT RESEARCH
ACTIVITIES
Lake Rehabilitation Studies
“We have found that by remov
ing predator and competitor fishes
from sockeye salmon rearing lakes
we can increase both growth and
survival. We are now in the proc
ess of determining how many fry
should be stocked in rehabilitated
and unrehabilitated lakes. These
findings have direct application to
projects being contemplated by
our commercial and sports fish di
visions. Shall we attempt to get
barren areas into production by
guess work or do we wish to know
exactly how many fry to put into a
given lake system for highest pro
duction?
“Fisheries people have for years
faced the problem—is the size of
smolt leaving a lake related to salt
water survival and return? Experi
ments started at Kitoi Bay in 1961
are designed to answer this ques
tion. If the smaller one-year old
sockeye smolts have just as good
saltwater survival as the larger,
older smolts, then smaller smolts
should be gotten out of the rearing
lake. If they holdover in the lake
the food supply is taxed and this
LOU VEERMAN
AGENT
486-2656
SAILING FROM SEATTLE
July 11, 1962
MS TANANA
Womens Bay, Kodiak,
Port Williams, Seldovia, Homer
means less production.
“In the summer of 1961 the tech
niques developed at the Kitoi Sta
tion were put to use in other lake
systems. Results of a five-day sur
vey of Afognak Lake showed the
lake to be quite productive and ca
pable of producing many more
sockeye salmon than now use the
system. In 1962 the Division of Bi
ological Research in cooperation
with the Division of Commercial
Fisheries, will start a program to
increase the numbers of sockeye in
Afognak Lake (there was a total
l
run of about 40,000 in 1961). The
ultimate goal is to at least double
and possibly triple the present pro
duction.
Pink Salmon Studies
“Kitoi Bay Station is suited for
research on pink salmon as well
as sockeye salmon. Significant re
sults from pink salmon research
initiated in 1960 have already been
obtained.
“For example, we now know that
natural survival of pinks in Big
Kitoi outlet stream is higher than
survival recorded for many other
streams in Alaska. An area not
much bigger than 20,000 square
feet has produced close to a million
fry and can produce more. We
need to learn why this is true so
that other similar areas in Alaska
can be discovered and utilized for
maximum production.
Predator Studies
“Much has been learned about
predators of young pink salmon.
We found that about 25,000 scul
pin (bullheads) lived in Big Kitoi
outlet stream. From examination of
(Continued on page 12)
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