. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. CARP CONTROL WORK IN LAKE ALMANOR, 1941 29 It is necessary to fold the wire in at the bottom to make an apron. This apron should then be staked securely so that the carp can not root under it. One or more V-shaped openings should be located so that the fish migrating toward their spa^vning area will enter Fig. 8. Gould's Swamp, Lake Alnianor, May, 1941. The carp trap located on sfream, and poisoning was carried on
. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. CARP CONTROL WORK IN LAKE ALMANOR, 1941 29 It is necessary to fold the wire in at the bottom to make an apron. This apron should then be staked securely so that the carp can not root under it. One or more V-shaped openings should be located so that the fish migrating toward their spa^vning area will enter Fig. 8. Gould's Swamp, Lake Alnianor, May, 1941. The carp trap located on sfream, and poisoning was carried on in the shallow areas in the right background. The use of powdered derris or timbo root has been described by several fisheries biologists but usually it is employed in waters which are to be completely poisoned. Thus, relatively small lakes or stretches (jf stream, even ocean tide-pools, can be completely freed of fish life. The present description is of a method of controlling an undesirable species wdthout affecting the more desirable ones. Selective poisoning with powdered derris root was reported by Greenbank- for a Michigan lake. Greenbank also reports selective poisoning of Fish Lake, Utah, in 1938, by Stillman Wright. Lake Almanor is not particularly well adapted to the control poisoning of carp but certain swamps and shallow indentations in its shore line are frequented by the spawning fish and here they can be poisoned with great ease. Long, narrow, shallow inlets in a lake shore -Greenbank, John. Selective poisoning of fish. Transactions, vol. 70, 1940, pp. 80-86, 1941. American Fisheries 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 Califor
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