. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. THIRTIETH BIENNIAL REPORT 53 During the latter part of April and the first part of May, Dr. George A. Coleman made a special study of conditions at Kern River Hatchery and Ave quote from his report as follows: "A thorough examination of this water was made from the intake at the head of the ditch, through the flume, settling tanks mid head troughs and hatching troughs. The ditch was found to be literally alive with blue green alg
. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. THIRTIETH BIENNIAL REPORT 53 During the latter part of April and the first part of May, Dr. George A. Coleman made a special study of conditions at Kern River Hatchery and Ave quote from his report as follows: "A thorough examination of this water was made from the intake at the head of the ditch, through the flume, settling tanks mid head troughs and hatching troughs. The ditch was found to be literally alive with blue green algae of several species which caused a disagreeable odor. This algae caused a heavy growth on the sides of the tanks and troughs and a scum or mould formed. Xo matter how often it was removed, a new growth would develop in 24 hours after a thorough cleaning. The fish w|ere found to be suffering from a heavy infestation of the gills with algae, fungus, and a peculiar desmid (Ankistrodesmus) which is finer than a cambric needle. It penetrates the gills and causes an irritation that is followed by a bacterial infection that soon causes Fig. 19. West Walker River Experimental Hatchery. Typical of experimental stations is this one, a tent with eight troughs. Photograph by George McCloud. On a great many fish in the last stages, a peculiar amoeboid pro- tozoan parasite was found on the gills by the hundreds, seem- ingly eating the algae, but also obtaining blood from the ; The above shows the general condition of the water in Kern River during the summer months. This season, 1928, the algal growths started unusually early. The writer has examined the Water several times during the summer and fall in years past and found the algae in great quantities but owing to the passage of the water through the tunnel, together with the dry season, it was worse this season than in former years. It never was considered good water for hatchery pur- poses. Often persons not familia
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