THIETY-PIRST BIENNIAL REPORT 21 



assembling of material and the editing of onr quarterly publication, 

 California Fish and Game; the preparation of a monthly employees' 

 bulletin; the release to the press of publicity covering the division's 

 activities, and the maintenance of an excellent library of books, peri- 

 odicals, and other publications dealing with fish and game and related 

 subjects. 



Our research activities have continued, with the aid of the Hooper 

 Foundation for Medical Research, in diseases of fish and game. Notable 

 advances have been made in the study of duck diseases, deer parasites, 

 quail diseases, and the prevention of deer and game bird damage. 



HYDRAULICS 



While progress has been made in the installation of fish screens and 

 ladders, there is still a large group of organizations and individuals 

 who resist the efforts of the Commission to prevent the loss of fish to 

 the waters of the state by the installation of screens in canals, and to 

 insure the passage of migratory fish to spawning areas by the installa- 

 tion of fish ladders. While existing legislation properly provides that 

 those who receive the benefit of the diverted water must protect the 

 state from the loss of fish life, there is still a strong feeling that this 

 protection (screens and ladders) should be paid for by the sportsmen 

 who are being deprived of fishing areas by the water diversions. 



The Bureau of Hydraulics has continued its effective work in the 

 prevention of oil pollution, and splendid cooperation has been received 

 from many of the oil operators. It is estimated that the oil industry 

 has expended in the neighborhood of $4,000,000 during the past three 

 years in the prevention of oil pollution. 



LEGAL BUREAU 



The legal work of the division has continued to be greatly varied in 

 character, and includes the prosecution of civil actions in the superior 

 courts in matters relating to water pollution, fish screens and ladders, 

 and the preservation of fish and game ; the defense of all actions insti- 

 tuted in federal, superior and other courts against the division, the 

 Commission, or its employees acting in their oflicial capacities ; assisting 

 the deputies of the division in the prosecution of criminal cases in 

 justice and police courts for fish and game law violations; rendering 

 opinions to employees of the division, and to other individuals and 

 organizations who desire an interpretation of the fish and game laws; 

 and the preparation of leases, agreements, and other instruments 

 required for the work of the division. 



The reports of the bureau heads are reproduced on the following 

 pages, as submitted by them, even though in some cases their recom- 

 mendations have not yet been approved hy the Commission. It is 

 believed that the interests of the state are best served by such a record 

 of the conclusions which have been reached by these trained observers. 



Respectfully submitted. 



John L. Farley, 



Executive Officer. 



