PROGRESS IN BIOLOGICAL INQUIRIES, 1936 53 
basin in eastern California. This drainage basin contains over 12 
lakes and 12 miles of stream lying at elevations from 7,000 to over 
11,000 feet. It is proposed to place both the lakes and streams in this 
basin under a definite management plan concerned with stocking, 
returns from anglers, stream and lake improvements, and related 
matters. On the lower portion of Convict Creek an experimental 
stream, 4,000 feet in length and providing 33 sections divided by con- 
crete flumes keyed for screens and flash boards, has been constructed in 
cooperation with the Forest Service. Experimental plantings of trout 
will be made here to determine the mortality of various sizes and 
species planted under varying environmental conditions. 
At Scott and Waddell Creeks a census of the spawning runs 1s made 
each year in order to determine the basic facts in the life history 
of the steelhead and silver salmon and the return from known escape- 
ments. During the 1935-36 season the run and egg-take for steelhead 
at Scott Creek was the largest (882) in a number of years and, judging 
by the number of marked fish returning, was largely due to an unus- 
ually successful plant of yearlings during 1934-385. At Waddell 
Creek the run of steelhead was smaller than in 1934-35, but larger 
than during 1933-34. The run of silver salmon in both streams was 
considerably less than during the previous seasons. In the lagoon of 
Waddell Creek striped bass were found feeding on young trout and 
salmon during the height of the seaward migration of silver salmon 
and may possibly have had an influence on the diminished run of 
1935-36. 
A marked decrease was noted in size of the down-stream sculpin 
migrations passing through Waddell weir. If this decrease continues 
it seems likely that dams not high enough to bar the migration of steel- 
head and salmon could be installed in California streams to control 
the number of sculpins above such dams. 
At both Waddell and Scott Creeks the losses due to furunculosis 
among adult steelhead and the young pondfish at Scott Creek were 
again heavy. Offspring from marked adult steelhead returning to 
Scott Creek were marked and planted in the stream in order to develop, 
if possible, a run of fish that would show resistance to this disease. 
On the Klamath River 27,378 young steelhead were marked and 
planted in Beaver Creek during June. These fish were hatched from 
eggs obtained at Scott Creek. This is a continuation of the experi- 
ment to check, under somewhat different conditions, the results ob- 
tained at Waddell and Scott Creeks and to establish an annual run of 
marked fish which would give some indication of the varying intensity 
of fishing in the main Klamath River. King salmon to the number 
of 39,170 were marked and liberated in Fall Creek, another tributary 
of the Klamath, on August 15. On September 3 of the previous year 
38,170 king salmon had been marked and liberated in the same stream. 
As a part of the cooperation between the Forest Service and the 
Bureau of Fisheries, Dr. Needham assisted in a biological survey of the 
lakes of the Willamette National Forest in Oregon. Two biologists 
were employed for this work by the Forest Service, while the Bureau 
loaned most of the necessary field equipment and directed the work. 
A cooperative survey of High Sierra lakes for “check-dam” sites in 
the Sequoia National Forest in California was likewise carried out. 
Reports of both surveys have been presented to the agencies concerned. 
