. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 280 G. HENDLER AND D. R. FRANZ X 09 03 09 Male gonad index Female gonad index- Female caecum index Male caecum index. 0 ' N 1971 D " J 1972 FM M A FIGURE 3. Organ indices for Leptasterias tenera in Block Island Sound. The mean and 95% confidence intervals are shown for the data from 5 males and 5 females in each sample. Sampling dates as in Figure 2. that the young seastars showed a 1:1 sex ratio, but that the sex ratio for individuals of breeding size differed significantly from unity, favorin
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 280 G. HENDLER AND D. R. FRANZ X 09 03 09 Male gonad index Female gonad index- Female caecum index Male caecum index. 0 ' N 1971 D " J 1972 FM M A FIGURE 3. Organ indices for Leptasterias tenera in Block Island Sound. The mean and 95% confidence intervals are shown for the data from 5 males and 5 females in each sample. Sampling dates as in Figure 2. that the young seastars showed a 1:1 sex ratio, but that the sex ratio for individuals of breeding size differed significantly from unity, favoring females. Fecundity and gonadal dimorphism L. tenera examined typically had two gonads in each arm. The ripe ovaries were small, lobate, and concentrated at the base of the arm, and mature testes were branched and some (by folding) exceeded the arm in length (Worley, et ai, 1977). The contrasting size of the gonads in males and females of different sizes is shown in Figure The length of the ovaries was directly proportional to the size of the seastar (Fig. 8). The number of oocytes was also a direct function of the size of the female (Worley, et al., 1977). Coefficients of determination (r) calculated from the sets of data for males and females show that 91% of the variability of ovary length, but only 18% of the variability of testis length, is explained by the size of the seastar (Fig. 8). Thus,. 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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