. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. 60 CALIFORNIA FISH AND GAME. FIGURE 2. Tagging Strongvlocentrotus franciscanwi in situ. The tagging needle has penetrated the sea urchins test and depression of the actuating level will insert the tag. Note the tagged sea urchin in left foreground. Photo by Fred Fischer. RESULTS AND DISCUSSION We tagged 150 giant red sea urchins, Strongvlocentrotus franciscanus, in January 1976, off La Jolla, California (Figure 3). We employed a taggi
. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. 60 CALIFORNIA FISH AND GAME. FIGURE 2. Tagging Strongvlocentrotus franciscanwi in situ. The tagging needle has penetrated the sea urchins test and depression of the actuating level will insert the tag. Note the tagged sea urchin in left foreground. Photo by Fred Fischer. RESULTS AND DISCUSSION We tagged 150 giant red sea urchins, Strongvlocentrotus franciscanus, in January 1976, off La Jolla, California (Figure 3). We employed a tagging rate of one sea urchin every 2 min and at a tag cost of less than five cents per urchin. Reobservation data were collected on 40 sea urchins. All data points in the graph were derived from actual observations within the test area; hence some sea urchins were not accounted for owing to movement from the test area or unrecovered fatalities. Test recalcification in the area of the tag was not observed in any of the sea urchins tagged by this method. However, one sea urchin, tagged without an identification disc, was removed months after tagging with no apparent ill ef- fects. Many urchins showed signs of test decalcification or thinning in the vicinity. 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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