. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. BOTTOM FAUNA OF BLUE LAKE 87 counted, and preserved in 70 per cent alcohol. Later, the volumes of the various components of each sample were determined by the displacement of water in a burette, after excess alcohol had been removed by placing the organisms momentarily upon a blotter. In transposing to units of weight, it was assumed that the specific gravity was one. This has been found to be approximately correct for organisms of th
. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. BOTTOM FAUNA OF BLUE LAKE 87 counted, and preserved in 70 per cent alcohol. Later, the volumes of the various components of each sample were determined by the displacement of water in a burette, after excess alcohol had been removed by placing the organisms momentarily upon a blotter. In transposing to units of weight, it was assumed that the specific gravity was one. This has been found to be approximately correct for organisms of the kinds involved (Davis, 1938, p. 12; Cooper, 1940, p. 65). Tables 1 and 2 contain the results of the analyses of the two series of bottom samples. The forms have been separated into four arbitrary categories, and for each sample the number and volume of each category has been given, as well as the total volume and number for the sample. There were few kinds of organisms present on the lake bottom, particularly in deep water. At depths greater than 15 meters ( feet), the only forms found were immature chironomids (Chironomus sp. near cristatus and Procladivs sp.),^ and tubifex worms. At depths of 2 Identified by O. A. Johannsen, Cornell University. Chironomids are small two- winged flies which deposit their egg-s in water, where the whole larval life is passed. The larvae are sometimes called ";. UrrCK RLM L«U Fig. 39. Map of Upper Blue Lake. Depths are shown in meters (1 meter = feet).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original California. Dept. of Fish and Game; California. Fish and Game Commission; California. Division of Fish and Game. [San Francisco, etc. ] State of California, Resources Agency, Dept. of Fish and Game
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