. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 1974 - 2- 1) CL i'J sper ma t ogonia spermatocytes & sperm at ids spermatozoa. B 1974 FIGURE 1. Volume fluctuations of gonadal regions during the annual reproductive cycle of Comanthus japonica. The number of individual animals averaged for each sample is shown above the date of collection. The spawnings of the first and third week of October 1973 are marked, respectively, by arrows I and II. For the triangular data points, only spawned animals in the collection were taken into account. For the data points labeled U. the
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 1974 - 2- 1) CL i'J sper ma t ogonia spermatocytes & sperm at ids spermatozoa. B 1974 FIGURE 1. Volume fluctuations of gonadal regions during the annual reproductive cycle of Comanthus japonica. The number of individual animals averaged for each sample is shown above the date of collection. The spawnings of the first and third week of October 1973 are marked, respectively, by arrows I and II. For the triangular data points, only spawned animals in the collection were taken into account. For the data points labeled U. the animals were unsexable; (A) volume per ovary of the post-pachytene oocyte population and of the ovarian lumen. The thickened segments of the horizontal axis indicate the approximate inter- val during each annual cycle when precursors of the post-pachytene oocytes (namely, oogonia and spireme oocytes) were present in the ovary; (B) volume per testis of the male germinal cell populations. Fluctuations in the size-jrequency struct it re oj the oocvtc population Changes in the size-frequency structure of the post-pachytene oocytes have been demonstrated by a frequency polygon analysis (Fig. 2). Each of the eleven average frequency polygons has been plotted against the date of collection. For most collections, the polygon of each individual female was approximately con- gruent with the average polygon ; however, four of seven females collected on 1 March 1973 had distinctly bimodal frequency polygons. Otherwise, the individual polygons were tmimodal, aside from relatively slight irregularities, which were presumably due to random sampling 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
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
