. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 520 GORDON HENDLER AND DAVID R. FRANZ MflftCM 1968 W4I5. I 234 567 8 9 10 II 12 13 14 15 16 17 IB 19 20 LENGTH 2 3 1 5 6 78 9 10 II 12 13 14 15 16 17 18 19 20 FIGURE 5. Size-frequency histograms for the cultch subpopulation; June 1967-August, 1968. forms range from 5-14 mm, overlapping both phallus-buds and males. The exis- tence of transitional forms, with the phallus-length to body-length ratio of phallus- buds and body length of large males, suggests that the male phase may be omitted in nature as well as in experimental
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 520 GORDON HENDLER AND DAVID R. FRANZ MflftCM 1968 W4I5. I 234 567 8 9 10 II 12 13 14 15 16 17 IB 19 20 LENGTH 2 3 1 5 6 78 9 10 II 12 13 14 15 16 17 18 19 20 FIGURE 5. Size-frequency histograms for the cultch subpopulation; June 1967-August, 1968. forms range from 5-14 mm, overlapping both phallus-buds and males. The exis- tence of transitional forms, with the phallus-length to body-length ratio of phallus- buds and body length of large males, suggests that the male phase may be omitted in nature as well as in experimental isolation. The females range from 6-20 mm and overlap all other sexual stages in size. Transition to the female phase can definitely be accomplished in one season, since mm females produced eggs during their first summer. The occurrence of females as large as mm suggests a life span of two seasons (H years) or more. Crepidula does not form the permanent chains of mated animals char- acteristic of some species in the genus. At any one time, a female carries only one attached male. If a third individual is attached to the mated pair, it is generally sexually immature. Data summarizing the sexual composition of the cultch subpopulation are shown in Figure 5; of the Pagurus subpopulation in Figure 6. Figures and present data on the per cent of females brooding egg masses and of females associated with male-phase 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 Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
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