. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 188 RICHARD A. BOOLOOTIAN, A. FARMANFARMAIAN AND A. C. GIESE .7 z o ui .6 V) v> o 5 o 4 x uj o o , < 3 o o .2. NDJFMAMJ JASON MONTH OF YEAR FIGURE 5. Gonad index of the abalone H. nifcsccns for the period November, 1956 to November, 1957. The circles are the mean values and the vertical lines are the 95% confi- dence limits. DISCUSSION Table III is a graphic summary of the breeding seasons reported in the litera- ture for eight species of Haliotis, from various parts of the world. Various lengths of breeding season hav
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 188 RICHARD A. BOOLOOTIAN, A. FARMANFARMAIAN AND A. C. GIESE .7 z o ui .6 V) v> o 5 o 4 x uj o o , < 3 o o .2. NDJFMAMJ JASON MONTH OF YEAR FIGURE 5. Gonad index of the abalone H. nifcsccns for the period November, 1956 to November, 1957. The circles are the mean values and the vertical lines are the 95% confi- dence limits. DISCUSSION Table III is a graphic summary of the breeding seasons reported in the litera- ture for eight species of Haliotis, from various parts of the world. Various lengths of breeding season have been reported for H. nifescens (Bonnot, 1930, 1940, 1948; Scofield, 1930; Croker, 1931) probably because systematic observations were not made throughout the year. As information was accumulated, the spawning period was extended, and Bonnot (1948) reported it to be from March to September. Monthly examination of the gonads of this organism at Pacific Grove, Cali- fornia, disclosed mature gametes throughout the year. Furthermore, recently metamorphosed individuals have been found at all seasons in Southern California. It thus appears likely that in both localities H. rufescens, considered as a popula- tion, breeds throughout 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 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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