PROGRESS IN BIOLOGICAL INQUIRIES, 1938 67 
chub increased in numbers the brook trout decreased in abundance 
and average size until it is now a negligible item in the catch. There 
is reason to believe that the rainbow and mackinaw are also on the 
decline. 
The results of earlier studies combined with those of last summer 
have made it possible to formulate a program of management which 
gives promise of improvement in the fishery. The following recom- 
mendations have been made to the State Department of Fish and 
Game: (1) That a program of eradication of the Utah chub be insti- 
tuted, (2) that a forage fish especially suited to the needs of the 
mackinaw trout be introduced, (3) that plantings of rainbow and 
mackinaw trout be continued, (4) that the present catch limit be 
drastically reduced and that attempts be made to develop other lakes 
for fishing, so as to decrease the fishing intensity in Fish Lake. 
In the search for a forage fish to meet the needs of the mackinaw 
trout, attention was directed to Bear Lake, Utah and Idaho, which 
has three species of Coregonidae found nowhere else. One of these, 
the Bonneville cisco (Leucichthys gemmifer Snyder), may prove to 
be a valuable forage fish, and a study of its hfe history has been 
begun. A more detailed study of Bear Lake is planned for 1939. 
At the present time the trout fishery in this lake is in a deplorable 
condition and a number of factors conspire against improvement. 
California trout investigations—The work of this research unit 
has remained under the direction of Dr. P. R. Needham, with head- 
quarters at the Natural History Museum of Stanford University. 
Dr. Osgood R. Smith was appointed to the staff in the position of 
Assistant Aquatic Biologist. The cooperative agreement that had 
been in effect since 1932 with the California Division of Fish and 
Game was abrogated by mutual consent on July 1, 1938. 
Cooperation with the United States Forest Service was continued, 
but lack of funds limited the extent of the work. Angling catch 
records were taken for a second season on Fish Lake, in the Umpqua 
National Forest, Oregon. Lack of funds caused abandonment in 
August of the survey of the North Fork of the Umpqua River and 
its tributaries when only partially completed. The survey of lakes 
in the Willamette National Forest was completed and a report cover- 
ing the entire three years’ work and containing stocking policies 
for all lakes suitable to fish life is now being prepared. A survey 
of lakes in the Columbia National Forest in Washington was begun, 
and it is planned to continue the work next season if funds are 
available. 
Complete catch records were secured for a second season on Squaw 
Creek in the Shasta National Forest, Calif., and a report is being 
prepared that will cover the 2 seasons’ activities. 
Loss of Mexican trovt—The flood of March 2, 1938, in southern 
California completely destroyed the Forest Home State Fish Hatch- 
ery, near Redlands, and with it both the adults and eggs of Salmo 
nelsoni brought to California from Baja California, Mexico, in the 
spring of 1937. An attempt will be made to secure another lot of 
these fish for breeding purposes. 
Convict Creek experimental stream—Experiments to determine 
the survival rates of hatchery-reared trout planted under controlled 
conditions were continued. Fifteen plants of marked rainbow and 
