. The Biological bulletin. Biology; Zoology; Marine biology. ASTERINA BREEDING AND DEVELOPMENT 261. Figure 2. Section of the gonad of a specimen of Asterina minor, which was fixed just before spawning. Hematoxylin-eosin stain. A) A testicular and an ovarian tubule, containing mature sperms and ova, respectively. B) Magnified picture of the testicular tubule in Figure 2A. C) Section of gonad showing that testicular tubules (te) are situated close to the gonoduct (d). D) A hermaphroditic gonad, in which ovarian part is dominating. E) A hermaphroditic gonad, in which testicular part is dominating
. The Biological bulletin. Biology; Zoology; Marine biology. ASTERINA BREEDING AND DEVELOPMENT 261. Figure 2. Section of the gonad of a specimen of Asterina minor, which was fixed just before spawning. Hematoxylin-eosin stain. A) A testicular and an ovarian tubule, containing mature sperms and ova, respectively. B) Magnified picture of the testicular tubule in Figure 2A. C) Section of gonad showing that testicular tubules (te) are situated close to the gonoduct (d). D) A hermaphroditic gonad, in which ovarian part is dominating. E) A hermaphroditic gonad, in which testicular part is dominating. F) Magnified picture of a part of Figure 2E. Scale = 100 yxa in A, C, E. Scale = 50 /mi in B, D, F. in the field in May. The following is a description of the typical process of breed- ing assemblage. Forty animals which were collected on April 25 and 26, 1974, began to organize into two groups in a large glass container in the laboratory several days after their collection. These groups were not very stable and animals moved frequently from one group to the other. Generally after about 10 days the assem- blages became stable, and no animals seemed to move from their respective group. At this time animals in either group clung to one another along the margins of their bodies, or thev were imbricated with others to some 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 Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-; Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report; HighWire Press. Lancaster, Pa. [etc. ] : Lancaster Press, inc. [etc. ]
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