474 U. S. BUREAU or FISHERIES 



Daphnia, and this may be partly responsible for the very small parasite infesta- 

 tion. Clear Lake also has very soft water, and the snail population, as a 

 result, is relatively small, so that the danger of parasite infestation from 

 this source is correspondingly small. Weber Lake also has soft water and a 

 comparatively small snail population, and this may account, in part at least, 

 for the small number of parasites found in the perch of that lake. 



In the investigations relating to the growth of the perch in the northeastern 

 lakes, Edwin Schneberger has read and measured the scales of about 3,000 

 specimens, from which rates of growth have been computed. 



In June, 1931, the following papers relating to the investigations made on 

 "Wisconsin lakes appeared in Volume XXVI of the Transactions of the Wiscon- 

 sin Academy of Sciences, Arts, and Letters. 



1. A third report on solar radiation and inland lakes. E. A. Birge and 

 C. Juday. 



2. A second report on the phosphorus content of Wisconsin lake waters. 

 C. Juday and E. A. Birge. 



3. Copepods parasitic on fish of the Trout Lake region, with descriptions of 

 two new sijecies. Ruby Bere. 



4. Leeches from the lakes of northeastern Wisconsin. Ruby Bere. 



5. Note on the determination of total phosphorus in lake water residues. 

 Leslie Titus and Villiers W. Meloche. 



PACIFIC COAST AND ALASKA FISHERY INVESTIGATIONS 



On May 22, 1931, the personnel and equipment of the Stanford 

 University field station of the Bureau of Fisheries were transferred 

 to the new Fisheries Biological Laboratory at Seattle, Wash. All 

 of the bureau's biological investigations, dealing with Pacific coast 

 fishery problems, except those relating to shellfish and the coopera^ 

 tive work on California trout, are now being carried on at this 

 station. 



The laboratory building of this new station is constructed of brick 

 and is fireproof throughout. It has three full stories and contains 

 29 offices for individual workers. The lower floor is taken up with 

 storerooms, photographic dark rooms, the heating plant, a room 

 which can be kept at constant temperature for the storage and 

 space for working on fresh or preserved specimens. The second floor 

 consists entirely of offices. The third floor is composed of additional 

 offices, two chemical laboratories, a fireproof room for the storage of 

 valuable data and a large library. Connections for gas, hot and 

 cold water, steam, compressed air, and vacuum are available in 

 virtually all of the individual offices, so that they may be converted 

 readily into experimental laboratories whenever the need occurs. 



The staff of investigators of the International Fisheries Commis- 

 sion, United States and Canada, is occupying quarters in the build- 

 ing at present, and offices for a statistical agent and a technologist 

 and one of the chemical laboratories has been fitted up for use of the 

 division of fishery industries. 



ALASKA RED SALIMON 



Karluk red salmon. — ^Marking experiments were continued at Kar- 

 luk, Alaska, during 1931 for the purpose of determining if possible 

 the mortality of the red salmon while the fish are in the salt water 

 and also to provide a check on the readings of the salt-water growth 

 taken from the scales. Fifty-five thousand red-salmon fingerlings 

 "were marked as they were migrating to the sea. The commercial 



