32 U. 8. BUREAU OF FISHERIHS 
Stations were established at various points in Aransas and Copano 
Bays. These stations were occupied at regular weekly intervals 
when the weather and availability of boats permitted. At each sta- 
tion trawl hauls were made for shrimp, and temperature and salinity 
observations were taken. In the fall Mr. Collier instituted a weekly 
survey of the shrimp distribution in Aransas Bay. Hauls of 5 min- 
utes duration were made with a small trawl in closely spaced parallel 
lines across the bay. From this work it appears that the shrimp 
follow a rather well-defined path across Aransas Bay in their move- 
ments from the more interior nursery grounds to the Gulf. During 
the coming year efforts will be directed toward determining the 
fundamental reasons for this distribution, 
NORTH PACIFIC AND ALASKA FISHERY INVESTIGATIONS 
Dr. F. A. Davinson, in charge 
The North Pacific and Alaska Fishery Investigations, with head- 
quarters in the Fisheries Biological Station at Seattle, Wash., are 
concerned chiefly with the maintenance and rehabilitation of the 
salmon and herring fisheries of Alaska and the salmon fisheries of 
Puget Sound and the Columbia River. All of the major investiga- 
tions in progress in 1937 were continued in 1938 with the exception of 
the Puget Sound sockeye investigation, which was discontinued in 
March 1938. An investigation of the Bristol Bay fisheries was 
undertaken in July 1938. 
COLUMBIA RIVER SALMON FISHERIES 
Investigations of the Columbia River salmon fisheries were con- 
tinued during 1938 by J. A. Craig, A. J. Suomela, M. J. Hanavan, 
Z. E. Parkhurst, J. L. Wilding, W. M. Morton, and J. A. Coleman. 
Stream survey ys.—One of the factors contributing to the depletion 
of salmon runs in the Columbia River watershed is the fact that 
important spawning grounds have been rendered inaccessible or made 
unsuitable for migratory fishes by the construction of irrigation 
diversions and by other activities of man. With the primary pur- 
pose of classifying those areas which may be rehabilitated, and of 
discovering means of making them accessible to fishes, an extensive 
stream-survey program has been undertaken and is now well under 
way. 
During the early part of the season these stream-survey activities 
were centered in the Willamette River system. In this area surveys 
were completed on the McKenzie River, the middle and coast forks 
of the Willamette and Long Tom Rivers, and the upper portions of 
the North and South Forks of the Santiam. The Clackamas River 
survey was partially completed. The McKenzie, Middle Willamette, 
and the Santiam Rivers are the most important spring chinook 
streams of the Willamette system. 
The Payette River system in Idaho was surveyed during the month 
of August. In early years this river was one of the important 
salmon streams in Idaho. Chinook and blueback salmon and steel- 
head trout migrated to the headwaters of this river in large numbers. 
