. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. NOTES 127 square quadrats were dug 8 to 10 inches deep at ;^1 i-aiidiiiiily selected stations around the higoon down to the — tide level. The samples were then screened with a sifting box having .25 inch niesli screen. The dominant size range of the 267 specimens sampled throughout the lagoon was 20 to 40 mm (maximum dimension) with extremes of 8 mm (the smallest clam that will be retained by the screen) to 101 mm (Figure 1). The l
. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. NOTES 127 square quadrats were dug 8 to 10 inches deep at ;^1 i-aiidiiiiily selected stations around the higoon down to the — tide level. The samples were then screened with a sifting box having .25 inch niesli screen. The dominant size range of the 267 specimens sampled throughout the lagoon was 20 to 40 mm (maximum dimension) with extremes of 8 mm (the smallest clam that will be retained by the screen) to 101 mm (Figure 1). The larger clams were found at stations close to tlie water line of a — tide. Since most sam])les were taken under less extreme tidal conditions, we believe the proportion of mature northern quahog is much greater than our samples indicate. On the east coast, 60 to 70 mm is the size at which tlie northern quahog reaches sexual maturity (Carriker, 1956, Sieling, 1956). Since sj)ecimens of 60 mm and above were found at one-third of the stations, we believe the Colorado Lagoon colonv is well established. B ;;uh''ht|||j|j||jj||||[|!l!!t!!||jj. FIGURE 1. Alercenar/a mercenono (A) Juvenile, (B) Mature Adult. (Photo by Dean Grose) ACKNOWLEDGMENTS We would like to thank Mary Jo George and Donald Drysdale for their help in making the survey; and Donald Keish, (-alifornia State College at Long Beach, John Fitch, California Dej)artment of Fish and Game, and Terry Paige, Long Beach Eecreation Department, for their cooperation. James McLean, Los Angeles County Museum, verified the specimens, and Jules M. Crane, Jr., Cerritos College, made suggestions on methods and reviewed the 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; Califor
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