-~17B.
Chinook salmon experiment--1949 brood year
During the fall of 1949, chinook salmon eggs were obtained
at Green River Station (20 miles south of Seattle), Washington
State Department of Fisheries.
These eggs were transferred
to the 146 Building, Hanford Works, where they were incubated
and the young fish reared until June 1950, at which time the
survivors were hauled in tank trucks to the Applied Fisheries
Laboratory at the University of Washington.
The fingerlings
were held and fed in the pools at the University until July l,
1950, when they were released.
During the incubation of the eggs and early feeding of
the fish at 146 Building,
Hanford Works,
some lots were retained
in dilute effluent water (five per cent) and a like number were
reared in controlled river water.
Before release the fish were
marked, the former by removal of the right ventral fin, the
latter by removal of the left ventral.
These fish were well represented in both the sports and
commercial fisheries as is shown in the following table compiled
from data collected by the Washington State Department of
Fisheries.
The actual recaptures are many times greater than
the numbers recorded in the table since only a small percentage
of the marked fish caught are
reported to the Fisheries Department.
Since the catch in the fishery of the RV-marked salmon was
considerably greater than that of the control salmon,
it appears