. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. BLACK SPOTTED TROUT IN BLUE LAKE, CALIFORNIA By A. J. Calhoun Stanford TJniversiiy Introduction During the course of a study of the blaek-spotted trout (Salmo clarkii henshawi) in Upper Blue Lake, carried on during the summers of ]940 and 1941, rather complete records of the size, composition, and other characteristics of the spawning runs of these fish were collected. Addi- tional information was obtained concerning the after-effects
. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. BLACK SPOTTED TROUT IN BLUE LAKE, CALIFORNIA By A. J. Calhoun Stanford TJniversiiy Introduction During the course of a study of the blaek-spotted trout (Salmo clarkii henshawi) in Upper Blue Lake, carried on during the summers of ]940 and 1941, rather complete records of the size, composition, and other characteristics of the spawning runs of these fish were collected. Addi- tional information was obtained concerning the after-effects of spawning upon the adults, and the status of natural reproduction in the lake. It is the purpose of this paper to present and to discuss these data. A brief description of the lake is included to furnish the reader the necessary background. A fvill account of the results of limnological studies car- ried on at Blue Lake, together Avith considerable additional material con- cerning the trout, is contained in a thesis submitted to the School of Biological Sciences of Stanford University (Calhoun, 1942).. Fig. 20. Upper Blue Lake in winter. The black-spotted trout was the native cutthroat of the Lahontan drainage system (Snyder, 1917). It has been introduced into numerous streams and barren lakes on the headwaters of the Mokelumne River, including Upper Blue Lake. Gill and Jordan (1878) first described the species from individuals collected at Lake Tahoe, as Salmo henshawi Recent work (Schultz, 1934, 1936) has demonstrated that the subgroups within the cutthroat series can not legitimately be given the rank of full species. The black-spotted trout should accordingly be designated Salmo' clarkii he^ishawi. 1 Submitted for publication, October, 19 43. Thi.'; paper is based on work done under the auspices of the California State Division of Fish and Game, in partial fulfill- ment of the requirements I'or the degree of Doctor of Philosopliy at Stanford University. (22). Please not
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