. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. 232 CALIFORNIA FISH AND GAME, FISH DIE IN MANY PARTS OF THE STATE. During the month of August reports came in to the Fish and Game Commis- sion of fish dying in different parts of the State from Santa Barbara to Shasta counties. The cause of death was trace- able in nearly every case to the exhaus- tion of the free oxygen in the water by the decomposition of organic matter. In other words the fish smothered. Fish breathe by means of g
. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. 232 CALIFORNIA FISH AND GAME, FISH DIE IN MANY PARTS OF THE STATE. During the month of August reports came in to the Fish and Game Commis- sion of fish dying in different parts of the State from Santa Barbara to Shasta counties. The cause of death was trace- able in nearly every case to the exhaus- tion of the free oxygen in the water by the decomposition of organic matter. In other words the fish smothered. Fish breathe by means of gills which are so constructed that the free oxygen which are catchment basins where organic malter is carried and deposited on the bottom. In streams of more rapid flow oxygen is supplied from the air by the movement of the water. There have been more than the usual number of cases of fish dying this summer, for the reason that there was an unusually large amount of organic matter washed into the streams during the past winter. Decomposition was held in check during the cool weather of early summer, but beginning late in July and continuing through August the. Fig. 53. Receiving trout from the fish car to plant in the American River. Photo by the McCurry Company. mixed in. the water is extracted and passes into the blood of the animal, just as the free oxygen in the air passes into the blood of animals breathing by means of lungs. The water of streams and lakes contains more oxygen in winter than at any other time, but as spring and summer come on, the temperature of the water rises, and the fermentation and decomposition of vegetable and ani- mal matter on the bottom or in solution increases at a rapid rate and exhausts the free oxygen in the water. This ex- haustion of oxygen is most marked in lakes, reservoirs, and sluggish streams weather was exceptionally warm. This warm weather coming at a time when the streams were low quickly exhausted the oxygen in the more quiet wate
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