. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. 210 CALIFORNIA FISH AND GAME ings at eacli end of the trap. Eaeli funnel \vas ni ( ) long. An access hole was cut in the top of each trap to permit removal of cap- tured fish. The traps were suspended to desired depths by nylon rope secured to permanently moored, fiberglass buoj's. Since threadfni shad are positively phototactic (Johnson 1970), we included a light source inside each trap to attract the shad. A light pa
. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. 210 CALIFORNIA FISH AND GAME ings at eacli end of the trap. Eaeli funnel \vas ni ( ) long. An access hole was cut in the top of each trap to permit removal of cap- tured fish. The traps were suspended to desired depths by nylon rope secured to permanently moored, fiberglass buoj's. Since threadfni shad are positively phototactic (Johnson 1970), we included a light source inside each trap to attract the shad. A light package, consisting of two 6-volt, dry cell batteries and a single 6-volt light bulb, was placed inside a liter (1 gal) glass jar. Each jar was. FIGURH 1. Cylindrical wire fish trap used to evaluate threadfin shad populations in sonic scattering 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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