. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. SPINY LOBSTER BIOLOGY AND BEHAVIOR 125 TABLE 1 Median Carapace Lengths (mm) of California Spiny Lobsters, by Months Month Jan. Feb. Mar. Apr. May June July Ann. Sept. Oct. Nov. Dec. Male Female . 77.(1 annual increment of mm; carapace lengths of females increased from 5G to 91 mm in 8 molts, an annual increase of
. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. SPINY LOBSTER BIOLOGY AND BEHAVIOR 125 TABLE 1 Median Carapace Lengths (mm) of California Spiny Lobsters, by Months Month Jan. Feb. Mar. Apr. May June July Ann. Sept. Oct. Nov. Dec. Male Female . 77.(1 annual increment of mm; carapace lengths of females increased from 5G to 91 mm in 8 molts, an annual increase of mm. Lsing the value , given by Backus I I960) for the average ratio of carapace length to total length, the annual total length increment would be mm for males and mm for females, slightly lower than the Incre- ments reported by Lindberg (1955) and Backus for this species. Oshima (1948), working with /'. japonicus, indicated that individuals 52 mm in carapace length are in their third year. Masuda I 1954 i, using the anteimuie flagella to determine ages for the same species, found that by age 3 these lobsters have passed through IS molts and arc 14s to 1!)1 mm tl. Assuming that Masuda measured "total length" in the same manner as Backus, we can adjust these figures using Backus's value i to a mean carapace length of mm. This puts Masuda "s animals within the lower size limits sampled in our study. Assuming that our smaller individuals are in their third year, female California spiny lobsters attain legal size (83 mm carapace length) in approxi- mately 10 years, the males in 11. This is appreciably older than the 7 or 8 years suggested by 52 58 64 70 76 82 88 CARAPACE LENGTH IN MM 94 100 106 112 118 FIGURE 4—Carapace length frequencies for male (solid line) and female (broken line) lobsters. Arrows indicate assumed year Please note that these images are extracted from scanned page images that may have been digitally
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