. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. 26 FISH AND GAME COMMISSION unable to intelligently conserve and use the splendid species with which nature has endowed us. Certain fish diseases common to the different varieties of trout seem to be prevalent throughout the State. In most cases they are of well known types and they may be held in check by rather simple means of control, hence their early diagnosis is imperative. Some are difficult to treat in a satisfactory manner. I
. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. 26 FISH AND GAME COMMISSION unable to intelligently conserve and use the splendid species with which nature has endowed us. Certain fish diseases common to the different varieties of trout seem to be prevalent throughout the State. In most cases they are of well known types and they may be held in check by rather simple means of control, hence their early diagnosis is imperative. Some are difficult to treat in a satisfactory manner. It is proposed to establish within the bureau an agency for the control of disease and the pre- vention of serious loss from that cause. In this connection it is intended that each station shall eventually be provided with a microscope of simple construction, and that the foreman and others in charge shall acquaint themselves with its proper use in the detection of the presence of certain organisms which are apt to give serious trouble unless their growth is checked. The writer, under State authority, recently made a trip of observa- tion to a number of the most noted centers of fish culture in the East. Fig. 4. Counting rack placed in the Shasta Kiver near its mouth for the enumera- tion of salmon and steelhead passing upstream on their spawning migration. Photo by Dr. J. O. Snyder, November 8, 1931. and IMiddle West. Through the courtesy of officials in charge, details of organization, construction, general hatchery methods, transportation and distribution were carefully observed. Some of these may and will be applied here with profit. After consideration of all that was seen and heard, it appears that no definite formulae or set of specific rules relating to construction, feeding, treatment of disease, distribu- tion and planting, or other methods of procedure relating to fish cul- ture may be successfully established for universal application. It follows that the fish cultu
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