. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 330 M. YAMASHITA AND F. IWATA "f4 »w*>Te-! »a?5a &«& ^Srt#v«i ".*iS •1Vj!>W| ;.^^3^/ • •*.». FIGURE 1. A: Photograph of Amphipholis koclui from the ventral view, partly dissected to show the attachment and arrangement of the testes. Scale = 5 mm. B: Photograph of the testes isolated from one inter-radial part. Scale == 1 mm. C: Histological cross section of the testis, showing a zonation of spermatogonia (SG), spermatocytes (SC) and spermatozoa together with spermatids (STZ). Scale = 100 /um. D: High
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 330 M. YAMASHITA AND F. IWATA "f4 »w*>Te-! »a?5a &«& ^Srt#v«i ".*iS •1Vj!>W| ;.^^3^/ • •*.». FIGURE 1. A: Photograph of Amphipholis koclui from the ventral view, partly dissected to show the attachment and arrangement of the testes. Scale = 5 mm. B: Photograph of the testes isolated from one inter-radial part. Scale == 1 mm. C: Histological cross section of the testis, showing a zonation of spermatogonia (SG), spermatocytes (SC) and spermatozoa together with spermatids (STZ). Scale = 100 /um. D: High magnification of the testis in Figure 1 C. From the testicular wall to the inside, spermatogonia (SG), spermatocytes (SC) and spermatozoa together with spermatids (STZ) form zones. Scale = 50 /urn. E: The amoeboid cell cluster in the sperm mass. Scale = 50 ^m. Annual cycle of spermatogenesis Figure 2 gives monthly fluctuations in the number of the spermatogenic cells, the area of the amoeboid cell clusters and the sea water temperature at the collection site. As a whole, the following five phases are distinguishable in the annual testicu- lar cycle. Phase 1: August to October. Spermatogenesis is arrested, and the spermatocytes are absent. A small number of the relict spermatozoa are ingested by the amoeboid cells forming large 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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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
